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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Journal of Korean Society of Hazard Mitigation
Journal Basic Information
Journal DOI :
Korean Society of Hazard Mitigation
Editor in Chief :
Moo Jong Park
Volume & Issues
Volume 16, Issue 4 - Aug 2016
Volume 16, Issue 3 - Jun 2016
Volume 16, Issue 2 - Apr 2016
Volume 16, Issue 1 - Feb 2016
Selecting the target year
Evaluation of the Effect of Vertical Ground Motion on 3-Story RC Frames with Various Span Ratios
Kim, Siyun ; Kim, Sung Jig ;
Journal of Korean Society of Hazard Mitigation, volume 16, issue 3, 2016, Pages 1~6
DOI : 10.9798/KOSHAM.2016.16.3.1
The paper presents an analytical assessment focusing on the effect of vertical ground motion on three story RC frames by considering different span ratios and vertical-to-horizontal peak ground acceleration ratios. Interstory drift ratio is considered as a global failure criterion, while the axial force variation, shear demand, and shear capacity of RC columns are monitored to assess the effect of vertical ground motion on a local level. It is observed that the inclusion of the vertical component of ground motion significantly affected the response of RC columns.
A Study on Positioning & Structure of an Emergency Stay Shelter for Increasing Evacuation Performance in the Balcony-Expanded Apartment
Park, Hyung-Joo ; Lee, Young-Jae ;
Journal of Korean Society of Hazard Mitigation, volume 16, issue 3, 2016, Pages 7~16
DOI : 10.9798/KOSHAM.2016.16.3.7
The purpose of this study was to analyze the adaptability of plan-front positioning and the effectiveness of structural protecting ability for architects to design the emergency stay shelters in balcony expansion. The balcony expansion, as only a tool for the space expansion from the open space to closed space facing living rooms has not permitted due to the negative aspect in emergency evacuation. As the amendment of the building code facilitated the balcony expansion on condition that installation of one emergency stay shelter, however, it has proved that the balcony-expanded apartment is more possible in terms of easiness of burning spread of upper level comparing with apartments without balcony expansion. Therefore, the shelters located in plan-front balcony expansion area has proved as being as a dangerous space for evacuators not to wait long until rescuer's arrival so that they should be placed at the rear or side of plans surrounded by spandrels. Furthermore, it concludes that the structural protection standard for the shelter facing room required by the existing code would be changed from fire resistant ability to smoke protecting standard.
A Comparative Study on Evacuation Time According to Guidance Lighting for Walkway When Visibility Level is Down
Kim, Jin-Su ; Rie, Dong-Ho ;
Journal of Korean Society of Hazard Mitigation, volume 16, issue 3, 2016, Pages 17~22
DOI : 10.9798/KOSHAM.2016.16.3.17
The smoke of fire is reduced a visibility, it is leads to a reduction in the walking speed. A Subway platform has been installed to the evacuee guidance lights on the bottom part of the central aisle corridor for safe evacuation of passengers(NFSC 303, 2014). In this study, the subway platform was estimated evacuation time under the coefficient condition factors (0.2~0.9[/m]). Also it is compared with evacuee guidance lights and without evacuee guidance lights. The simulation space is
that is half size of the underground stations, evacuee are 100. The results of the study show that last evacuation time is 103 sec in non- coefficient condition. Incase of coefficient condition in 0.9[/m], it increase about twice times than non-coefficient condition on last evacuation time is 190 sec. Also the extinction coefficient higher goes up effect of guidance light when the visibility is 0.9 [/m], last time of evacuation time is faster than condition on non-guidance light(19.5%).
An Experimental Study on the Structural Performance of Helix Pile to Concrete Footing Connection
Oh, Myoung Ho ; Kim, Myeong Han ;
Journal of Korean Society of Hazard Mitigation, volume 16, issue 3, 2016, Pages 23~30
DOI : 10.9798/KOSHAM.2016.16.3.23
New construction details for the Helix pile to concrete footing connection have been developed to overcome the shortcomings of existing connection details. In this study, the structural performance of this connection was evaluated experimentally with the full-scale test specimens. The joint details composed of slide block key for splicing the Helix piles were also included in the experimental study. The Helix pile to concrete footing connections with the newly developed details were efficiently capable of transferring the applied loads from the upper structure to the substructure pile. The cement mortar filled in the pipe of Helix pile prevented the pile from buckling effectively, and the joint details for splicing the Helix piles using the slide block key backed up the ultimate load capacity of the Helix pile.
Seismic Fragility of Underground Utility Tunnels Considering Probabilistic Site Response Analysis
Han, Seung Ryong ; Lee, Ho Dam ; Lee, Chang Soo ;
Journal of Korean Society of Hazard Mitigation, volume 16, issue 3, 2016, Pages 31~37
DOI : 10.9798/KOSHAM.2016.16.3.31
The purpose of this study is the evaluation of the seismic fragility of underground utility tunnels buried. The seismic fragility was estimated by developing fragility curves to assess the degree of vulnerability of structures stochastically. To consider the response of soil which has inherent uncertainty, probabilistic site response analysis had performed based on the shear-wave velocity generated by Monte Carlo Simulation. Artificial earthquakes were generated by enveloping uniform hazard response spectra (UHRS) for the Korean peninsula. The seismic fragility curves were developed through a total of 7200 time history analysis from combination of various conditions of utility tunnels and generated soil properties. The developed fragility curve compared with other fragility curves which were developed for the fixed and deterministic condition of the underground utility tunnels using
in the national seismic design standard. As a result, the seismic fragilities using probabilistic site response analysis show less vulnerable than the seismic fragilities with the fixed condition. This study presents that current seismic design of underground utility tunnels is conservative and reflects safer.
A Study on Model of Heavy Rain Risk Prediction Using Influencing Factors of Flood Damage
Lee, Hyun-Jong ; Ryu, Seong-Hyun ; Won, Shawn ; Jo, Eun-Ju ; Kim, Seung-Wook ; Joe, Gi-Hun ;
Journal of Korean Society of Hazard Mitigation, volume 16, issue 3, 2016, Pages 39~45
DOI : 10.9798/KOSHAM.2016.16.3.39
In this study, we calculated the risk of flooding rains in Seoul districts through a regression analysis. The Results of regression analysis present it to us that 'weighted hourly rainfall', 'capacity of rainwater recycling facility', 'vulnerable housing'(single multiplex housing density, basement semi-basement housing rate), 'topography drainage'(lowlands rate, average slope, drainage pump capacity), imperviousness ratio are powerful factors to damage by order. Non-standardized regression coefficients multiplied by time duration to hourly rainfall classified section created a derived variable indicating the risk of flooding. Capacity of rainwater recycling facility were identified to affect a significant negative flood damage. The Model of this study could be used as basis to establish adapt disaster prevention against heavy rainfall damage.
Analyzing Types of Urban Areas at High Risk to Landslide Hazard Based on the GIS Approach
Moon, Yonghee ; Lee, Sangeun ; Kim, Myoungsoo ; Baek, Jongrak ;
Journal of Korean Society of Hazard Mitigation, volume 16, issue 3, 2016, Pages 47~53
DOI : 10.9798/KOSHAM.2016.16.3.47
According to the rapid population growth and urbanization, many cities suffer from the limitation in space, and hence the commercial buildings, educational facilities, and housing settlement areas continue to stretch until the bottom of the mountain. In result, residents become more and more vulnerable to landslides and debris flow. This led to the central government to perceiving the need for strengthening regulations relevant to urban planning. In order to consider risks due to landslides and debris flow in the stage of urban planning, present authors suggested the strategies. This study obtained a total of 76 priority areas, which were also classified into three types - Type A (high population exposure and mid landslide occurrence likelihood) - 27 areas, - Type B (mid population exposure and high landslide occurrence likelihood) - 25 areas, and 14 areas - Type C (high population exposure and high landslide occurrence likelihood).
A Study on the Runoff Parameter Estimation in the Distributed Model
Lee, Jaejoon ; Lee, Sungho ; Kwak, Changjae ;
Journal of Korean Society of Hazard Mitigation, volume 16, issue 3, 2016, Pages 55~66
DOI : 10.9798/KOSHAM.2016.16.3.55
The purpose of this study is to estimate some runoff parameters for using COBRA model which is distributed rainfall-runoff model. COBRA model has been developed to estimate the runoff of composite urban basin in 2012. Some runoff parameter which are total porosity, residual water contents, and pore-size distributions are analyzed for the validity about the their estimates. The Guryang watershed of Yongdam test bed is selected as experimental region. Runoff hydrograph between observed one and simulated one which is used mean value of runoff parameters are compared for 8 historic rainfall-runoff events. It is shown that simulated one is underestimated in comparison with the observed one in terms of peak discharge in this case. Therefore an additional sensitivity analysis is fulfilled to seize the sensitivity of some runoff parameters. The range of runoff parameters is covered from 75% to -75% of their mean values. The COBRA model is considered to be drawn properly as following results that are Total porosity and pore-size distributions were shown in inverse relation to the peak discharge, and otherwise residual water contents was shown in proportional relation. By applying the sensitivity analysis is classified according to the parameters sets in terms of 6 kinds of soil drainage classes in Guryang watershed, a default value of some runoff parameters is proposed for using COBRA model. The fitness of runoff hydrograph between observed one and newly simulated one was examined to be higher than that of before correction in accuracy.
A Study on Elements Derived for Disaster Recovery Support Priorities
Jeong, Inju ; Kim, Sunkuk ; Chol, JeaHoon ; Jung, SamGyo ;
Journal of Korean Society of Hazard Mitigation, volume 16, issue 3, 2016, Pages 67~71
DOI : 10.9798/KOSHAM.2016.16.3.67
In case of Korea as well as, natural disaster such as typhoons, floods, droughts, etc. occurs continually. As of 2014, the number of casualties was 27 people and the amount of the property damage was estimated at 6,944 hundred million won during the last ten-year average. Moreover, scale of damage in urban is rising by increasing frequency of local torrential rainfalls due to climate change. According to these phenomena, the government is expanding supports for natural disaster relief expenditure, though fairness in priority lacks when restoration expenditure is executed. In this present paper, we derived the elements for disaster recovery support prioritization that expect to utilize the priorities of the recovery assistance.
Optimum Mine Ventilation System Using Gallery Temperature Prediction
Kwon, Joon Uk ; Song, Doo Hwan ; Kim, Yun Kwang ; Jang, Yun Ho ;
Journal of Korean Society of Hazard Mitigation, volume 16, issue 3, 2016, Pages 73~79
DOI : 10.9798/KOSHAM.2016.16.3.73
Working on the prediction of temperature under propriety examination for the development of a deep coal bed and safety ventilation design is important. This paper focuses on its ultimate goal in optimizing the work place environment by assuring that the required optimal ventilation rate are based on the analysis of the airflow. The working environment is deteriorated due to a rise in temperature of a coal mine caused by an increase of its depth and carriage tunnels, so in order to improve the environment, a ventilation evaluation on J coal mine is carried out. Also, the effect of the tunnel length on the temperature to enhance the ventilation efficiency on the subsurface is numerically analyzed. The temperature prediction for the main carriage gallery 9X in -475 ML is under construction and once completed and made. The result would be
Development and Application of Debris-flow Remote Monitoring System using Solar Energy in Urban Area
Kim, Jongrack ; You, Kwangtae ; Jang, Suhyun ; Lee, Deuksoo ; Lee, Dongsoo ;
Journal of Korean Society of Hazard Mitigation, volume 16, issue 3, 2016, Pages 81~86
DOI : 10.9798/KOSHAM.2016.16.3.81
The purpose of this study is to perform a system development and field application to remotely monitor the occurrence of debris flows in urban area. The main goal was to measure the sensing data and CCTV images using only solar power without an external power supply. The developed system was installed on the test bed located at S-city. The several sensors were installed such as rainfall gauge, piezometer, water content sensor, wire sensor, geophone, level meter and CCTV to consider the related factors to debris flow occurrence. The data aquisition interval was adjusted by the condition of precipitation to save the consumption energy. To prevent the loss of the measured data, the data logger saved them on the internal memory when the local system could not connect to communication server. The data were sent after network connection. In addition, we developed a monitoring software to query and analyze the storage data in the database. The operating results during five months showed a reliable system performance that is compared with system design capabilities.
A Study on National Disaster Safety R&D - Focusing on the Disaster Types and Management Phases
Choi, Sumin ; Lee, Juyoung ;
Journal of Korean Society of Hazard Mitigation, volume 16, issue 3, 2016, Pages 87~94
DOI : 10.9798/KOSHAM.2016.16.3.87
As social concerns and demands for safety increase, Korean government has established various disaster plans for hazard mitigation. One main plan was to improve research and development (R&D) capabilities regarding disaster prevention and management. In this study, Korean government's current plans on disaster safety R&D and recent years' government funded disaster safety R&D projects from the National Science & Technology Information Service (NTIS) database were analyzed. The projects were categorized by two criteria. One was the types of disaster-natural, social, special, maritime, and fire safety & rescue activity- and the other was the phases of disaster management- anticipation, prevention, preparedness, response, recovery, and platform. The results show that R&D projects on social disaster were the most numerous in types and R&D projects on prevention were the most numerous in phases. These analyses show that the improvements on response phase R&D ability and whole-cycle management is needed in the disaster R&D system of Korea.
Measures for Assessing the Criteria of Appropriate Relief Goods Stockpiling: Case Study on Seoul City
Seo, Jung Pyo ;
Journal of Korean Society of Hazard Mitigation, volume 16, issue 3, 2016, Pages 95~103
DOI : 10.9798/KOSHAM.2016.16.3.95
Korea is hit every year not only with typhoons, heavy rain and other natural disasters, but also with unpredictable various disasters, leading it to suffer a large number of disaster victims, and human and property damage. To quickly rescue such victims, the stockpiling of relief goods is one of key countermeasures. This paper thus aimed to set up the criteria for appropriate stockpiling of relief goods by examining the types of relief goods, their composition status, stockpiling and support status. And, it examined th relief goods stockpiling assessment criteria for Seoul City in a bid to set up the criteria for local governments. Towards that end, Seoul City's natural disaster damage, caused in the period of 2001-2011, was examined. Alongside this examination, to estimate the dependent variable, no. of disaster victims, the regression analysis method, involving the independent variables, such as population density, disaster damage, and rainfall as correlation factors, was used; thus the goods relief stockpiling criteria was derived. This paper also found that, to assess the appropriate criteria for relief goods stockpiling, the staff's knowledge and experience, the utilization of accurate and ample data, and the future forecasting method are important.
A Study on the Improvement of Local Government Safety Management Plan - Focusing on Comparison of Emergency Operations Plan by USA -
Kwak, Changjae ; Rheem, Sangkyu ; Choi, Woojung ;
Journal of Korean Society of Hazard Mitigation, volume 16, issue 3, 2016, Pages 105~115
DOI : 10.9798/KOSHAM.2016.16.3.105
It is critical to develop and maintain appropriate plans for all stages of disaster management in order to respond effectively and efficiently during the emergency situation. The plans need to secure the continuous training and exercise for timely operations of emergency situation. There are three levels of Safety Control Plans including the Master Plans for National Safety Control, Si Do Safety Control Plans and Si Gun Gu Safety Control Plans in Korea. This study analyzed the Safety Plans' developing process and 2015 Safety Control Plan guideline. The study includes three main contents that focus on emergency operations and safety management: (1) making process of Emergency Operations Plan(EOP) in USA; (2) comparing EOP of Colorado State and Si Do Safety Management Plan and Si Gun Gu Safety Management Plan written which was updated in 2015; and (3) drawing implications and suggesting a way of improvement plans.
A Study on Establishment of Strategy for Development of Storm and Flood Damage Prediction System
Jang, Hyungsu ; Oh, Kukryul ; Kim, Wonhyun ; Sim, Oubae ;
Journal of Korean Society of Hazard Mitigation, volume 16, issue 3, 2016, Pages 117~124
DOI : 10.9798/KOSHAM.2016.16.3.117
Recently, climate change had caused the frequency of rainfall occurrence and magnitude to increase. For this reason, disaster damage, recovery cost and casualties had also increased continuously. The establishment and operation of a storm and flood damage prediction system would serve as a tool for the government in order to draft a disaster prevention policy. In Korea, the casualties or damage function and damage estimation technique is currently on it early development stage since it still lacks direct and indirect damage scale calculation, limitations in the development of prediction techniques, etc. accordingly, It is need for the development of Storm and flood damage prediction system to support disaster response phase by decision making. In this study, foreign systems were analyzed and then strategies on how to apply such systems into Korea's situation developed. It suggested the need for considering various damage functions with real-time/scenario-based damage prediction and inventory setting from foreign research cases. As a result, the storm and flood damage prediction system framework was designed to meet domestic situation wherein its development will include the development of real time/scenario-based storm and flood damage prediction. Through the development of this system, an effective disaster response for business support system can be developed.
A Study on the Comparison of Volcanic Disaster Response Systems in Korea, China, and Japan
Yi, Waonho ; Kim, Hyewon ; Lee, Sungsu ; You, Jinsun ;
Journal of Korean Society of Hazard Mitigation, volume 16, issue 3, 2016, Pages 125~131
DOI : 10.9798/KOSHAM.2016.16.3.125
Since the eruption of Eyjafjallajokull in Iceland in 2010 with its impacts in global scale, the potential threat from volcanic disaster increased the attention in Korea due to past historic records of eruptions of Mt. Baekdu and adjacent volcanoes in Japan and China. Due to the absence of preparedness to volcanic disaster in Korea, it is important to understand the response and mitigation measures to the volcanic hazard. For this purpose, this paper tries to compile the relevant measures and regulations in Japan and China, among which Japan has a lot of experience in volcanic disasters over history and subsequently build systematic responsive structures both in governmental and civil levels. With comparisons of the regulations and systems for the volcanic disaster preparedness between Korea, Japan and China, this paper presents the possible improvement in those in Korea.
Analysis on the Amount of Muscle Activity According to Changes of Material Arrangement in Footpath Pavement Work
Lim, Tae Kyung ;
Journal of Korean Society of Hazard Mitigation, volume 16, issue 3, 2016, Pages 133~141
DOI : 10.9798/KOSHAM.2016.16.3.133
The study aims to measure and analyze changes in the amount of muscle activity of the workers in the footpath pavement construction in accordance with the change of the material arrangement to prevent musculoskeletal disorders of the construction laborers. Experiment methods are as follows. Subjects may install five cement blocks one by one with a squatted posture on a pre-built virtual workspace. The material positions are planned to be placed in the left (M1), middle (M2), and right (M3) outside the workspace. The rectus femoris of the leg portion, brachioradialis of the arm portion, the upper trapezius of the shoulder, and elector spinae of the waist are selected to measure the muscle activity. The experimental results are summarized as follows. The material position that may alleviate the physical workload in the right rectus femoris, the left and right brachioradialis, and left elector spinae is determined to be the left side (M1). For the right upper trapezius, it is determined that it is appropriate to place the material on the left side (M1) or the middle (M2).
A study on System of Disaster Medical Response - Focused on Analysis of EMS Activity of Previous Step in the Hospital Regarding Incident Cases of Mass Casualty -
Shin, Yong Sik ;
Journal of Korean Society of Hazard Mitigation, volume 16, issue 3, 2016, Pages 143~150
DOI : 10.9798/KOSHAM.2016.16.3.143
This research analyzes the cases of emergency medical response to mass casualty incident. Upon mass casualty incident, response activities such as initial severity classification, patient extraction, secondary severity classification and wounded transport are done as previous step of hospital. These response activities are triage, treatment and transport. Many empirical studies analyze that suitable response activities of previous step to the hospital upon many deaths occurrence have important influence in decreasing loss of lives. This emphasizes the importance of systematic EMS activities in previous step to hospitals. This research analyzes adequacy of activities such as severity classification, field first aid and wounded transfer which are pre step activities to hospitals by many death occurrence targeting 3 cases of incident happened in Gyeonggi-Do in 2014 and 2015. Analyzed data utilized operation report of disaster situation room of National Emergency Medical Center and inner document reported to Ministry of Public Safety and Security after being written in Disaster and Safety Headquarters of Gyeonggi-Do. The result of analysis shows that activities of severity classification, wounded first aid and wounded transport were not done systematically upon 3 mass casualty incidents happened in Gyeonggi-Do in 2014 and 2015.
Study on the Prediction of the Shallow Failure-prone Sites by Using Digital Aerial Photos: on the Mt. Umyeon in Seoul City
Lee, Kwang-Youn ; Kim, Kyoung-Nam ; Jang, Su-Jin ; Seo, Gi-Beom ; Kim, Beom-Soo ; Chun, Kun-Woo ;
Journal of Korean Society of Hazard Mitigation, volume 16, issue 3, 2016, Pages 151~160
DOI : 10.9798/KOSHAM.2016.16.3.151
Applying stereovision-typed aerial photo for the landslide analysis of mountain is one of the popular method in the parts of geomorphology and disaster analysis. This study explores the landslide effects by overlapping digital aerial photo, digital terrain map, and DEM on the soft photogrammetry. The standardization for observing the landslide effects is developed, and systematization is explored by interpreting the procedure and know-how, and finally drawing up of a interpretation map. In this way, total of 23 types of interpretation indicator were selected, and able to develop the procedure for overlapping data selected for applying each indicator. Finally, the whole process was applied to the case of Mt. Umyeon in the city of Seoul, and could developed 13 interpretation legends.
Determining the Priority of Investment by Risk Assessment for Slopes
Ryu, Jihyeob ; Han, Sehee ;
Journal of Korean Society of Hazard Mitigation, volume 16, issue 3, 2016, Pages 161~170
DOI : 10.9798/KOSHAM.2016.16.3.161
The program ESRAS(Expert System for Risk Assessment of Slope) Ver 1.0 that can assess the risk of slopes by means of fuzzy inference is developed in this paper. The results of assessment involve the degree of stability of slopes, the possible travel distance of the soil mass being failed, and anticipated loss of life and properties. With this program, vulnerable slopes can be managed most effectively and the fuzzy inference is used to express quantitatively the judgement of an expert and the uncertainty of slope stability. The fuzzy rule base is composed of an evaluation list for slope stability together with the experience of an expert. This program has been examined for 88 slopes which have been failed or shown a possibility of failure. With this examination, the standards to assess the stability of slopes can be presented and it is proven that this is particularly useful in determining the priority of investment for remedial works of slopes.
An Experimental Study on the Temperature-Time Curve of Compartment
Kweon, Oh-Sang ;
Journal of Korean Society of Hazard Mitigation, volume 16, issue 3, 2016, Pages 171~177
DOI : 10.9798/KOSHAM.2016.16.3.171
To deal with building fire risk which has been increasingly diversified, performance-based fire safety design is required more than ever and allows to perform more rational design considering alternative design approach. First strategy for developing alternative design is identify fire characteristics of the building like to prediction temperature in the compartment. Standard temperature curve is applied domestically in evaluating fire resistance performance using heating furnace and temperature growth curve required at early stage of fire depends on
growth curve. This study is intended to analyze engineering temperature growth prediction curve and evaluate the practicable temperature growth curve using a real-scale fire experiment data. Combustion experiment using heptane burner sized
. Experiment result was showed results silmiar with BFD and New curves. Moreover, New courve indicated better result at the stage in temperature decay.
Analysis of an Automotive Fire Case that Broke Out during Driving after Established Black Box
Lee, Euipyeong ;
Journal of Korean Society of Hazard Mitigation, volume 16, issue 3, 2016, Pages 179~187
DOI : 10.9798/KOSHAM.2016.16.3.179
This study investigated a car fire that broke out in the dashboard during driving and analyzed a fire cause and the party responsible for the fire. The black box and its auxiliary battery of the car were put after its purchase. A fire station investigator concluded that a fire cause was related with a black box auxiliary battery. This author dismantled the dashboard to investigate the fire cause and found that the fire was caused by a power steering module and not by the black box auxiliary battery. The findings were presented by evidence. It was also found that the responsibility of the fire rested with a car maker rather than with a car owner or a car service center putting the black box auxiliary battery. The investigation of the car fire case confirmed that the cause of a car fire should be judged by specific investigation including dismantlement and not be estimated by investigating appearances or prejudice without evidence.
Effects of Working Time on Physiological Response Wearing Fire Fighting Equipment
Yoo, Donghoon ; Choi, Huynki ; Lee, Bongseop ; Bang, Changhoon ;
Journal of Korean Society of Hazard Mitigation, volume 16, issue 3, 2016, Pages 189~193
DOI : 10.9798/KOSHAM.2016.16.3.189
In this study, the effects of working time(15 min, 30 min) on physiological response(heart rate, rating of perceived exertion, cool thermal sensation, weight variation, tympanic temperature, glucose, lactate) wearing fire fighting equipment were investigated. The results of the study are as follows; There were significant treatment by time interactions for heart rate, rating of perceived exertion, cool thermal sensation, weight variation, and tympanic temperature. However, glucose and lactate showed no significant difference in treatment by time interaction effects. It was concluded that physiological response of human body varied considerably by increase of working time wearing fire fighting equipment. Further research on individual health and safety during fire fighting tasks should be carried out.
A Study on the Fire Suppression in Ultra High-Buildings using Fire Department Connection
Min, Sehong ; Park, Jongduk ; Kwon, Yongjoon ;
Journal of Korean Society of Hazard Mitigation, volume 16, issue 3, 2016, Pages 195~201
DOI : 10.9798/KOSHAM.2016.16.3.195
Fire station are operating fire pump truck to suppressing fire. But it doesn't have sufficient performance to deal with high-rise building disaster. Some fire station have extra-high pressure pump for high-pressure water discharge, but due to its expensive cost, it's practically impossible that allocate to all fire station. So it requires method for suppressing high-rise building fire with non-extra high pressure fire pump. Fire department connection system is installing to more than 70 m height buildings, for directing fire suppression. But, there is possibility of malfunctioning of this system. So we designed moveable fire pump apparatus system for substitute for fire department connection system.
The Evaluation of Fire Resistance Performance of High Strength Concrete for Nuclear Power Plant Structure
Ryu, Dongwoo ;
Journal of Korean Society of Hazard Mitigation, volume 16, issue 3, 2016, Pages 203~208
DOI : 10.9798/KOSHAM.2016.16.3.203
The method of concrete mix design used in this study aims to achieve the identical specified design strength, applying different types and replacement ration of mineral admixtures and afterwards, fire tests were conducted using the standard time-temperature curve specified in the ASTM E119 to identify the influences of the types of mineral admixtures on the fire resistance performance of HSC. The least spalling was observed in the test specimen containing blast furnace slag as a partial replacement of cement, while the most significant spalling phenomena were observed in the test blast furnace slag test specimen that silica-fume was added in.
A Study on the Reliability for Sprinkler System of the Underground Parking Lot: Focusing on the Underground Parking Lot in Gyeonggi-do
Hwang, Chwanghwan ; Choi, YoonJong ; Kim, Hakjoong ;
Journal of Korean Society of Hazard Mitigation, volume 16, issue 3, 2016, Pages 209~214
DOI : 10.9798/KOSHAM.2016.16.3.209
There were many cases of not fire control in initial time because the sprinkler system did not work at underground parking lots. But, the study of working ratio and cause of not working at underground parking lots is not progressed. So, Analyze the working of sprinkler system at underground parking lot fire in Gyonggi-do using the from 2010 to 2015 data of National Fire Information System. The result of study, the reliability of sprinkler system is very low because sprinkler system work at only 6 cases fire of 63 cases.
A Study on the Freeze of Sprinkler Piping through Temperature Measuring of Underground Parking Lots
Hwang, Chwanghwan ; Kim, Hakjoong ;
Journal of Korean Society of Hazard Mitigation, volume 16, issue 3, 2016, Pages 215~219
DOI : 10.9798/KOSHAM.2016.16.3.215
There are many cases of great fire by not operating of springkler system in underground parking lot. It was due to be installed not wet type but preaction springkler system because of worring pipe freeze. In addition to that, preaction springkler system is difficult to maintenance the system and checking the construction errors. Recently, Building is deeper and deeper for securing the more parking lots. This study is that freezing or anti-freezing condition on the underground floor level to apply wet type springkler system. The result of study, there is not freeze below
Performance test of High-durable Precast Concrete Pavement System
Na, Okpin ; Seo, Taesuk ; Kim, Junhyung ; Jung, Yunsoo ; Choi, Jisun ; Choi, Hoonjae ;
Journal of Korean Society of Hazard Mitigation, volume 16, issue 3, 2016, Pages 221~228
DOI : 10.9798/KOSHAM.2016.16.3.221
The cast in-place concrete pavement takes easily negative effects on the reduction of construction time due to the quality of concrete, so that a precast concrete (PC) pavement system has been developed. The purpose of this study is to suggest the new slab connecting method for rapid PC pavement construction and flip-over for the improvement of durability. To evaluate the performance of this pavement system, rapid chloride penetration test, scaling test, and fatigue test for the serviceability against traffic loadings were conducted. As a result of RCPT and scaling test, the bottom side of PC slab was superior to the pouring side of it. When the cyclic loading of 80 kN was applied to slab connection, there was no crack to be observed and the load transfer of dowel bar was reduced up to 10%.
Full-scale Test for Load Transfer Efficiency of Fast Hardening Track
Choi, Wonseok ; Lee, Heeyoung ; Lee, Illwha ; Chung, Wonseok ;
Journal of Korean Society of Hazard Mitigation, volume 16, issue 3, 2016, Pages 229~234
DOI : 10.9798/KOSHAM.2016.16.3.229
The existing ballasted track has problems including riding quality degradation due to disorder of track and increasing maintenance cost. To solve aforementioned problem, Fast Hardening Track (FHT) has been developed for replacing the ballasted track. In FHT system, the joint of adjacent slabs is the most vulnerable for damage since deformation of joint will be discontinuous. In this study, a full-scale FHT system was fabricated and tested to evaluate the performance of two joint configurations. The first joint is supported by aggregate interlock and geogrid, and the second one is only reinforced by geogrid. Both joints were loaded to investigate the displacement, strain, earth pressure, and load transfer efficiency. It has been found that the joint reinforced by aggregate interlock showed excellent load transfer efficiency. In general, the FHT reinforced by aggregate interlock and geogrid provides far less deflection and strain responses compared to without aggregate interlock case.
Hydraulic Characteristics of Leakage for the Monitoring of Water Distribution System
Kwon, Hyuk Jae ;
Journal of Korean Society of Hazard Mitigation, volume 16, issue 3, 2016, Pages 235~242
DOI : 10.9798/KOSHAM.2016.16.3.235
In this study, pressure change due to artificially reproduced leakage was measured to analyze the hydraulic characteristics of leakage in pilot plant of water distribution system. Pressure change due to leakage was estimated by EPANET and compared with the experimental results. It was found that EPANET underestimates the pressure change due to leakage in water distribution system. Furthermore, the relationship between pressure change and leakage amount was defined. The relationship between pressure change and leakage distance from the leakage location to the monitoring location was also defined. It was found that pressure change was more sensitively response to leakage amount than leakage distance.
Statistical Analysis on In-situ Material Properties for Aged Cores of Earth-Cored Fill Dams
Park, DongSoon ; Oh, Jeheon ;
Journal of Korean Society of Hazard Mitigation, volume 16, issue 3, 2016, Pages 243~256
DOI : 10.9798/KOSHAM.2016.16.3.243
For the safety evaluation of aged cored fill dams, it is essential to obtain in-situ engineering properties of core zone. However, material properties of aged dam cores have been rarely reported or published. In this study, comprehensive geotechnical investigation and laboratory testing schemes were conducted by no-water borehole drilling and sampling through the dam cores of 13 earth cored fill dams. As a result,
distribution by SPT were plotted to normalize confining pressure dependency and to identify stiffnesses of compacted core layers. After statistical processing, we proposed the median, upper and lower bound distribution of both fundamental soil properties (such as gradation, water content, specific gravity, unit weight, liquid limit, and plasticity index) and mechanical properties (such as permeability, strength parameters, and consolidation characteristics) for in-situ aged dam cores. Detail features of each parameter are discussed for characteristic dams. The results are believed to be contributable to the safety evaluation of aged cored fill dams with insufficient information regarding in-situ material properties, and to the classification of the potential hazard of cores.
Reliability Analysis for Limit State Design of Shallow Foundation in Sandy Soil
Kim, Sun Il ; Kim, Dong Gun ; Yoo, Nam Jae ;
Journal of Korean Society of Hazard Mitigation, volume 16, issue 3, 2016, Pages 257~264
DOI : 10.9798/KOSHAM.2016.16.3.257
Considering level of reliability prevailed currently, resistance factors for applying the Load Resistance Factors Design method (LRFD) to designing shallow foundation on sandy soil (c = 0,
) were proposed in this paper. To quantify the expected uncertainties of soil properties related to soil parameters and bearing capacity of a shallow foundation on sandy soil ground, data used for design and construction from domestic and abroad was collected and analysis of probability statistics on soil properties was performed. First-Order Reliability Method (FORM) was used to propose the target reliability index for general shear failure of shallow foundation. Estimated values of target reliability index were compared with those obtained from the allowable stress design method, based on the safety factor, being currently used in practices.
Induction Waterway Review by Debris Flow's Characteristics
Ro, Kyung Soo ; Jeon, Ki Woong ;
Journal of Korean Society of Hazard Mitigation, volume 16, issue 3, 2016, Pages 265~269
DOI : 10.9798/KOSHAM.2016.16.3.265
Owing to a recent abnormal weather, landslide and debris flow's occurrence causes that damage of the urban increases rapidly. Therefore, when the disaster occurres, the disaster prevention method should be required. So, utilization of inactive space, such as a park, retarding basin, reservation area, the ground and parking lot when the urban forms reduces the damage of sediment disaster. It needs development of induction technology. Now facilities and the technology guiding control to landslide and debris flow do not exist. In Japan training wall about reduction method from the damage of lava flow is being installed, but that kind of facilities does not exist in Korea. However, a scale and frequency of landslide and debris flow increases year after year. In the case that the urban forms near mountainous district, technical development of guide control should be needed for reducing damages from landslide and debris flow. Furthermore, it is necessary to review of an induce waterway that is artificially induced debris flow to low-risk area. Induction waterway study by debris flow's characteristics were carried out in this study.
Pullout Behavior of Multiple Compression Type Anchor with the Space of Load Point
Hwang, Tae-Hyun ; Lee, Kang-Il ;
Journal of Korean Society of Hazard Mitigation, volume 16, issue 3, 2016, Pages 271~279
DOI : 10.9798/KOSHAM.2016.16.3.271
The multiple compression type anchor(MCA) was formed by the divided strands to have the different length. Therefore the divided strands can behave independently, and the bond stress around the bond length was induced uniformly. However the space of load points in tendon were not considered in field, although the pullout behavior of MCA may be different with the space of load point. Thereby this study was carried out a numerical analysis to investigate the pullout characteristics of MCA with the space of load points. In analyses results, the pullout behavior of MCA was different by the space of load point. And the bonded stress on the boned length was distributed uniformly, for
Fundamental Period Formulas for The Korean-style House Using Ambient Vibration
Kim, Hye Won ; Lee, Jung Han ; Park, Byung Cheol ; Yi, Waon Ho ;
Journal of Korean Society of Hazard Mitigation, volume 16, issue 3, 2016, Pages 281~289
DOI : 10.9798/KOSHAM.2016.16.3.281
In Recent, researches for the earthquake-resistant performance of Korean wooden house are insufficient, although earthquake occurrences are steadily increased in Korea. The primary purpose of this research is to find out dynamic characteristics such as natural frequency and damping factor of Korean wooden house. To evaluate the dynamic characteristics, micro tremor measurements are performed for 24 sites. And for each site, the natural frequency is determined by Fast Fourier Transform analysis, and damping factor is analyzed by synchronized human excitation. From the test results, the damping factor was measured less than 5%, and primary natural frequency of 24 sites were ranged from 1.9 Hz to 7.45 Hz due to the period of house use, the types of construction method, structural changes and so on. And natural frequency is affected by plan type, and plan aspect ratio. Using regression analysis with 24 houses, the natural period equation regarding to the height is suggested.
Evaluation of Network Performance and Data Quality of Korea Infrasound Stations
Kim, Tae Sung ; Kang, Ik Bum ; Che, Il-Young ; Kim, Dong Won ; Kim, Young Chai ;
Journal of Korean Society of Hazard Mitigation, volume 16, issue 3, 2016, Pages 291~297
DOI : 10.9798/KOSHAM.2016.16.3.291
Two organizations in Korea are operating 10 infrasound stations which are being used for protecting people from natural or man-made disasters such as volcanic eruption, earthquake or nuclear tests. A study before fusing infrasound data from these stations is performed. Data quality of the two stations, Yangu and Chulwon station, does not reach to an expected level due to high frequency noise problem caused by poor management of background noise reduction system. Yangu station is experiencing continuous strikes by lightning due to high ground resistance value. Based on the optimum network performance evaluation, it is suggested to move Yangu station to Jeju island.
Study on Characteristics Analysis of Sediment Accident Based on Insurance Claim Record and its Practical Application
Baek, Chunwoo ;
Journal of Korean Society of Hazard Mitigation, volume 16, issue 3, 2016, Pages 299~307
DOI : 10.9798/KOSHAM.2016.16.3.299
This study deals with vitalization of private insurance as an alternative for indemnification and restoration of sediment accidents. Claim records, which have been received by H Insurance, on sediment accident during 1999~2014 were analysed. As the result, frequency, total damage and average damage of sediment accident had been increasing. However, sediment accident of fire insurance, property all risks insurance, and flood and wind insurance shows decreasing trend different from that of engineering insurance and car insurance, which covers all natural disaster. It is presumed that this opposite result should be caused by coverage on sediment accident stated in the policy and low insured rate on additional clause for flood and wind. It is expected that private insurance can be an effective alternative for indemnification and restoration of sediment accidents if the issue, which is relating to clear statement about included accident in the policy on sediment accident and increase of insured rate on additional clause for sediment accident, are solved.
A Study on Evaluation and Transfer of Typhoon Risk by CAT Model
Ha, Kag-Cheon ; Kim, Ji-Myong ; Yoon, Myong-Oh ;
Journal of Korean Society of Hazard Mitigation, volume 16, issue 3, 2016, Pages 309~314
DOI : 10.9798/KOSHAM.2016.16.3.309
Natural disasters such as the Thailand flood have led to huge losses and the greater interest and needs in CAT model, a loss estimation tool. In the past, domestic non-life insurance companies failed to develop and apply an advanced CAT model and have been passive in CAT reinsurance and cumulative risk management. For risk management purposes, insurance companies use CAT models. There has been certain problems with models previously used in domestic environment and the model was enhanced and compared with existing and overseas models in terms of applicability. This study finds that with the application of CAT model based on Typhoon scenarios, it is possible to improve and stabilize cumulative risk management, reinsurance budget control and portfolio operation.
Analysis of Flow Change in Sump by Floor Cone Anti-Vortex Device Height Using CFD
Rhee, Dong Sop ; Kim, Hyung-Jun ;
Journal of Korean Society of Hazard Mitigation, volume 16, issue 3, 2016, Pages 315~321
DOI : 10.9798/KOSHAM.2016.16.3.315
Pump station is a very important flood control facility to mitigate inundation area in low-land in urban area. It is not easy to secure site to increase capacity of pump station in urban area due to the various limits. Thus, the maximization of discharge capacity have to be achieved under restricted condition. New pump install with larger capacity could be suggested to increase capacity of pump station. However, additional facility may affect to the flow characteristics, such as increase of flow velocity and vorticity, and cause sever problem to operation of pump station. To solve that problems, the anti-vortex device (AVD) which reduce vorticity of flow could be adopted. In the design process of pump stations in Korea, engineers consider design criteria from foreign countries because lack of appropriated design standard in Korea. Furthermore, design of AVD is based on the experience since enough data about AVD are not available. In this study, numerical simulation based on computational fluid dynamics (CFD) had been used to simulate flow in sump with various conditions of AVD height to supply information which can be apply to the design of pump station.
Estimation of Soil Erosion Using RUSLE Model and GIS Techniques for Conservation Planning from Kulekhani Reservoir Catchment, Nepal
Ban, Jeevan Kumar ; Yu, Insang ; Jeong, Sangman ;
Journal of Korean Society of Hazard Mitigation, volume 16, issue 3, 2016, Pages 323~330
DOI : 10.9798/KOSHAM.2016.16.3.323
This study intended to spatially estimate the soil erosion rate of Kulekhani reservoir catchment area, Nepal applying Revised Universal Soil Loss Equation (RUSLE), adopting remote sensing data and geographic information system (GIS) techniques. Average soil erosion rate of watershed was found to be
which is quite high as compared to threshold rate of erosion
applicable for Himalayan region. It is concluded that soil erosion rate of comparatively 41% area was tolerable but has no distinct zone and approximately 58% area of catchment was on the verge of high to very severe intensity classes. Higher severity of soil erosion was scattered all over the watershed hence conservation measures should be implemented over whole catchment area. The research demonstrates that the use of remote sensing data and GIS has an abundant advantage in predicting soil erosion rate for the sustainable land use and ecological management planning of Himalayan region of Nepal.
A Evaluation on Vibration Serviceability of Concrete Filled Steel Box Girder Bridge
Kang, Sunghoo ; Park, Sunjoon ;
Journal of Korean Society of Hazard Mitigation, volume 16, issue 3, 2016, Pages 331~336
DOI : 10.9798/KOSHAM.2016.16.3.331
The subject of this study was a two-span continuous concrete-filled steel box girder bridge. The bridge surface vibration was quantitatively measured by driving a vehicle of which total weight was 267 kN. The vibrational effect was assessed focusing on pedestrians on the basis of the experimental results. A 'concrete-filled steel box' is prepared by filling concrete in a separate box inside the conventional steel box. In a continuous bridge, concrete is restrictedly filled in the internal part where a negative moment is generated. A vibration acceleration response prediction equation was proposed by using the acceleration response and the scaled-weight obtained from the experiment. The proposed equation may be used to preliminarily predict the paved surface vibration response of a concrete-filled steel box girder bridge, though the applicable weight and speed of cars are partly limited. The vibration serviceability was assessed by using acceleration conversion curve of the Reiher-Meister. When the driving velocity of the vehicle used in the experiment was in the range of 10 km/h to 30 km/h, the vibration was in 'Level E'where the pedestrians are unable to recognize vibration. When the velocity of the vehicle was in the range of 40 km/h to 60 km/h, the vibration was in 'Levels D to E' which are the appropriate levels where the pedestrians do not feel uncomfortable, indicating that the bridge secured appropriate vibration serviceability.
Inundation Analysis of Hanul Nuclear Power Plant against Historical Tsunamis
Cho, He Rin ; Cho, Yong-Sik ;
Journal of Korean Society of Hazard Mitigation, volume 16, issue 3, 2016, Pages 337~343
DOI : 10.9798/KOSHAM.2016.16.3.337
Tsunamis mostly triggered by impulsive undersea ground motions are probably one of most devastating coastal hazards. Since tsunamis could travel a long distance, they may attack not only neighboring but also distant countries. Several nuclear power plants are under operation and constructing now along the eastern coast of the Korean Peninsula. The eastern coast of Korea is very vulnerable to unexpected tsunami attacks generated near the western coast of Japan. In this study, the safety analysis has been done at Hanul Nuclear Power Plants against historical tsunamis. The maximum run-up heights are predicted to examine the possibility of inundation, while the minimum run-down heights are also computed to check whether the supply of cooling water is possible. The Hanul site is safe against those historical tsunamis.
Control of Wave Reflection Using Energy Damping Layers in the Mild-Slope Equation
Jung, Tae-Hwa ; Son, Sangyoung ;
Journal of Korean Society of Hazard Mitigation, volume 16, issue 3, 2016, Pages 345~349
DOI : 10.9798/KOSHAM.2016.16.3.345
A new technique controling wave reflection using sponge layer is introduced in this study. Wave height in the sponge layer is affected by the group velocity and imaginary part of complex wave number. Using this relation, the target wave height is reflected from the boundary. The present method is validated thorough the numerical simulation using the mild-slope equation.
Hourly Precipitation Simulation Characteristic Analysis Using Markov Chain Model
Chung, Gunhui ; Sim, Kyu Bum ; Jo, Deok Jun ; Kim, Eung Seok ;
Journal of Korean Society of Hazard Mitigation, volume 16, issue 3, 2016, Pages 351~357
DOI : 10.9798/KOSHAM.2016.16.3.351
Hydrological systems and hydraulic structures design of rainfall are used as input data. Accordingly shows the different analysis results. In this study, an hour unit of time rainfall occurred simulation using the Markov Chain model. Simulation was used for the time unit of rainfall in 1985~2014 year, 6~10 month. Simulated rainfall was generated using a Markov Chain model. In addition, selection of suitable probability density function using Rainfall occurrence time. Accordingly applied to simulated rainfall data generated by creating rainfall. The past rainfall and rainfall simulation characteristic comparison. Overall, rainfall characteristics showed a similar peak rainfall expression showed a slight underestimation (4.88~9.28%) results. One of the problems of all simulation model does not represent a peak rainfall. Rainfall simulation overall it was similar using time unit rainfall. But, will be helpful to describe the rainfall determined if supplement the rainfall estimation methods.
Methodological Approaches to the Vulnerability Assessment for the Effect Quantification of Debris Flow Disaster Mitigation Facilities
Lee, JiHo ; Lee, JunSun ; Lee, SeungOh ; Jun, HwanDon ;
Journal of Korean Society of Hazard Mitigation, volume 16, issue 3, 2016, Pages 359~367
DOI : 10.9798/KOSHAM.2016.16.3.359
Recently, the scale of localized torrential rains, extreme rainfall, and typhoons has become large due to the climate change which is caused by global warming, and the riskiness of debris flow disaster is increasing by urbanization and industrialization as well. In the case of a domestic situation, it is vulnerable to debris disaster due to high population density of the urban and the debris adaption technique which is suitable to domestic situation needs. In this study, we suggest the methodology to quantify for the effectiveness analysis of debris disaster mitigation facilities. Debris flow disaster vulnerability can be classified as physical aspects and human aspects. Flow depth, flow rate and impact pressure of the debris disaster are used to evaluate the physical vulnerability and physical vulnerability were estimated by summing factors in the grid vulnerability. Human vulnerability assessment is quantified by comparing critical depth of age and gender in grid with occurred mud depth. The suggested methodology can quantify the installation effect of debris flow disaster mitigation facilities, and be used to combination of debris disaster mitigation facilities and its capacity decisions.