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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Journal of the Korean Society of Safety
Journal Basic Information
Journal DOI :
The Korean Society Safety
Editor in Chief :
Volume & Issues
Volume 21, Issue 6 - Dec 2006
Volume 21, Issue 5 - Oct 2006
Volume 21, Issue 4 - Aug 2006
Volume 21, Issue 3 - Jun 2006
Volume 21, Issue 2 - Apr 2006
Volume 21, Issue 1 - Feb 2006
Selecting the target year
Quantitative Fire Risk Assesment for the Subway Platform Types
Rie, Dong-Ho ; Kim, Ha-Young ;
Journal of the Korean Society of Safety , volume 21, issue 6, 2006, Pages 1~6
Subway platform is divided into Side-platform type and Center-platform type. In this study does quantitative fire risk assesment of subway platform types in numerical analysis by using CFD model. From the result of this study, 1) All exhaust mode was low-end result it seems most fire risk at Side-platform station. 2) All exhaust mode was low-end result it seems most fire risk at Center-Platform station. 3) When comparing same type exhaust mode of Side-platform and Center-platform that last thing was visible
low-end fire risk. Center-platform is more opera-tive than Side-platform that reduce fire risk when that was same dimension and external environment. Designer look upon a fire characteristic of subway platform types when he make smoke control air volume and platform area design.
FEM Analysis on Temperature Distribution and Thermal Stress of a Brake Drum for Large Commercial Vehicle
Kim, Ho-Kyung ; Lee, Young-In ; Joo, Se-Min ;
Journal of the Korean Society of Safety , volume 21, issue 6, 2006, Pages 7~13
A transient heat transfer and thermal stress analysis for a brake drum of commercial vehicles have been performed by ANSYS code in the cases of single braking and the repeated braking condition. The temperature and thermal stress distributions in the brake drum under various braking conditions were obtained using a two-dimensional axisymmetric model. In case of deceleration of 0.3G with an initial vehicle speed of 60km/h, the maximum temperature in the drum was
after braking application. The maximum stress of 78.7MPa in the drum occurred at the intersection between the flange and hat under a condition in which repeated 15 cycles braking with an initial vehicle speed of 60km/h and a deceleration of 0.3G is applied to according to KS R1129. The maximum stress value is much lower than the yield strength of drum material(FC250).
Evaluating on the Effects of Circumferential Thinning Angle and Bending Load on the Failure Pressure of Wall-Thinned Elbow through Burst Tests
Kim, Jin-Weon ; Na, Yeon-Soo ; Lee, Sung-Ho ;
Journal of the Korean Society of Safety , volume 21, issue 6, 2006, Pages 14~19
This study performed burst tests using real-scale pipe elbow containing simulated local wall-thinning to evaluate the effects of circumferential thinning angle and bending load on the failure pressure of wall-thinned elbow. The tests were carried out under the loading conditions of internal pressure and combined internal pressure and bending loads. Three circumferential thinning angles,
, and different thinning locations, intrados and extrados, were considered. The test results showed that the failure pressure of wall-thinned elbow decreased with increasing circumferential thinning angle for both thinning locations. This tendency is different from that observed in the wall-thinned straight pipe. Also, the failure pressure of intrados wall-thinned elbow was higher than that of extrados wall-thinned elbow with the same thinning depth and equivalent thinning length. In addition, the effect of bending moment on the failure pressure was not obvious.
Development and Application of Detailed Procedure to Evaluate Fatigue Integrity for Major Components Considering Operating Conditions in the Nuclear Power Plant
Kim, Byong-Sup ; Kim, Tae-Soon ;
Journal of the Korean Society of Safety , volume 21, issue 6, 2006, Pages 20~25
In the design of class 1 components to apply ASME code section III NB, a fatigue is considered as one of the important failure mechanisms. Fatigue analysis procedure and standard fatigue design curve(S-N curve) is suggested in ASME code, which had to be performed to meet the integrity of components at the design step. As the plant life extension for operating power plants and the long-lived plant design, however, are being progressed, the fact which the existing ASME fatigue design curve can not consider fatigue effects sufficiently comes to the fore. To find the technical solution for these problems, a number of researches and discussion are continued up to now. In this study, the detailed fatigue analyses using the 3 dimensional modeling for the fatigue-weakened components were performed to develop the optimized fatigue analysis procedure and their results are compared with other reference solutions.
Analysis of Electric Shock Risk of the Human Body in Underwater
Kim, Sung-Chul ; Kim, Doo-Hyun ; Lee, Chong-Ho ; Kim, Chong-Min ;
Journal of the Korean Society of Safety , volume 21, issue 6, 2006, Pages 26~32
The paper considers the electrical shock risk of the human body due to underwater leakage current in electric field. The characteristics of electric shock in fresh water due to the leakage of submerged electric facility in the bathtub in public baths were conducted. The exposed live electrode is modeled as a point source of electric current source. It is assumed that divergent monopole field exists in the vicinity of the current source, regardless of the presence of return electrode and insulating boundary. The electric potentials in the steel bathtub, Diesen and Mole and Flux3D program one are measured according to the distance from leakage source. The results show that the increased shock risk and safe distance are estimated by the bathtub of limited width and the voltage calculated on the basis of a divergent monopole field concept is compared with the measured value.
A Study on Improvement Plan on the Standard of Judgment of Electrical Code to Protect Against Electric Shock in the Water
Kim, Han-Sang ; Kim, Chong-Min ;
Journal of the Korean Society of Safety , volume 21, issue 6, 2006, Pages 33~37
Underwater lighting is installed in water tanks, fountains and pools in waterparks, it has direct contact with water and in case of any electrical failure due to faults from electrical equipment, there is a lot of electrical shock risk. In this paper, we proposed an improvement plan of the standard of judgment of electrical code which is MOCIE (Ministry of Commerce, Industry and Energy) notification by fact finding survey and analysis of the domestic and foreign codes.
A Study on Thermal Characteristics on Polymeric Floorings
Lee, Nae-Woo ; Kim, Nam-Seok ; Moon, Byoung-Soo ;
Journal of the Korean Society of Safety , volume 21, issue 6, 2006, Pages 38~45
Polymeric floorings mainly consisted of PVC are easily decomposed by many kinds of hot environmental factors, then generate hazardous asphyxiate gases and/or toxic gases etc. Therefore the mechanism of decomposition and quantitative toxic indices of products are very important for preventing safety and health disasters, especially in case of confined area. So we have investigated decomposition kinetics, numbers of process involved, toxicity indices of product and so on, using DSC, TGA, FT-IR and Pyrolyzer-GC/MS. The thermal decomposition process of polymeric floorings can be mainly divided by dehydrochlorinated reaction and polyene decomposition step, and activation energies of those are approximately
. Especially lethal concentration(
), fractional effective dose (FED) are calculated by measuring the amount of decomposition product. The values on
of sample G are ranged
in case of sample K and H are
respectively. Even if the results are estimated by calculation method without animal test and/or clinical demonstration, these values could be very useful data for occupational health, hygiene and safety control.
Performance of Fire Extinguishing of Water Mist Nozzle for Power Transformer Fire Scenario
Lee, Kyoung-Duck ;
Journal of the Korean Society of Safety , volume 21, issue 6, 2006, Pages 46~54
Fire extinguishing experiment was conducted with water mist nozzle in case of the pool fire, cascade fire and spray fire on flammable liquid of class B whether water mist system can be effective system for power transformer fire scenario. In the event of a pool fire, flow rate and time to extinguish was inclined to be increased according to the obstruction rate of ignition space. Furthermore, the performance of fire extinguishing depended upon the spraying angle of the nozzles. In case of cascade fire, the effect of extinguishment was began to show from a combustion pan filled with fuel and fuel flowing plate later on.
Safety Index of Korean Society Analyzed by Time Series
Shin, Chang-Sub ; Kim, Sung-Min ; Hwang, Suk-Keun ; Lee, Kyoung-Duck ; Yee, Jae-Yeol ;
Journal of the Korean Society of Safety , volume 21, issue 6, 2006, Pages 55~63
Rapid economic growth in Korea, on the other side, has generated increase of multiple complex dangers. To take off dangers scattered in the Korean society and to conduct safe society for better life, it is needed to develop social safety index. Social safety index analyzed by time series could compare and estimate various social disasters, thus it act as the foundation to set up safety policy. The research has focused on 8 social safety indexes; natural disaster, fire, traffic accident, crime, industry accident, forest fire, collapse and explosion, and environmental pollution. To find out Korean society safety index analyzed by time series, the research analyzed changes of each safety indexes in 10 years since 1994. Looking at the changes of each indexes, traffic accident showed the most improvement overall the nation, with industrial accident and collapse and explosion rating second and third place. However, crime, fire and natural disaster get worse, and especially crime has turned worsened than any other divisions.
Analysis of Defect Cases by Construction Types in Apartments
Go, Seong-Seok ; Song, Hyuk ; Lee, Jae-Hong ;
Journal of the Korean Society of Safety , volume 21, issue 6, 2006, Pages 64~73
Due to the lack of available land for housing in Korea, apartment has been supplied in great quantities to raise the rate for land-use since the middle of 1980s. Many people in Korea live in apartment because the number of apartment occupies more than half of total houses. Nevertheless, the concern on the house management with respect to the quality is insufficient, it is currently required the concern on the quality of housing. Moreover, many defects in apartment has been occurred repeatedly now, so, it is necessary to analyze the defect in order to raise the quality of living environment. This study aimed to survey the types of defect in apartment according to the construction types through the questionnaire analysis about apartment residents in Gwangju city for the purpose of reducing the defects.
Risk Assessment for the Failure of an Arch Bridge System Based upon Response Surface Method(I): Component Reliability
Cho, Tae-Jun ; Bang, Myung-Seok ;
Journal of the Korean Society of Safety , volume 21, issue 6, 2006, Pages 74~81
Probabilistic Risk Assessment considering statistically random variables is performed for the preliminary design of a Arch Bridge. Component reliabilities of girders have been evaluated using the response surfaces of the design variables at the selected critical sections based on the maximum shear and negative moment locations. Response Surface Method(RSM) is successfully applied for reliability analyses for this relatively small probability of failure of the complex structure, which is hard to be obtained by Monte-Carlo Simulations or by First Order Second Moment Method that can not easily calculate the derivative terms of implicit limit state functions. For the analysis of system reliability, parallel resistance system composed of girders is changed into parallel series connection system. The upper and lower probabilities of failure for the structural system have been evaluated and compared with the suggested prediction method for the combination of failure modes. The suggested prediction method for the combination of failure modes reveals the unexpected combinations of element failures in significantly reduced time and efforts compared with the previous permutation method or system reliability analysis method.
A Study on Improvement of the Shape and Performance of Raised Pavement Marker
Kim, Sang-Bum ; Kwon, Yong-Seok ;
Journal of the Korean Society of Safety , volume 21, issue 6, 2006, Pages 82~87
The existing raised pavement marker, however, have some limitations. Most of them are square-shaped which makes only forward and backward retro-reflection, their orientation can be easily changed by impact of vehicle, and the surface reflector can be readily contaminated leading poor functioning. In addition, maintenance for broken raised pavement marker is not easy. The purpose of the study is to design and manufacture a new and improved type of raised pavement marker. The new raised pavement marker has round-shaped upper structure. Its body was separated from the holder and the reflector was surrounded by acrylic cover. We tested performances of the constituent parts, optimum load after installation, and reflection efficiency. The new raised pavement marker will be an initiation of studies on the improvement of the shape and performance of raised pavement markers.
A Study on the Improvement of Apartment House Remodeling through Sick House Syndrome Attitude Survey
Go, Seong-Seok ; Lee, Jae-Hong ; Song, Hyuk ; Lee, Hyun-Chul ; Hong, Ju-Hyun ;
Journal of the Korean Society of Safety , volume 21, issue 6, 2006, Pages 88~95
The aim of apartment house remodeling should be accomplished by three courses; first, to reduce resources and environmental pollution, and second, to overcome social issue such as sick house syndrome on the point of residents' safety, and last, to secure life quality of apartment house healthy and nature friendly through satisfying residents' desire comfortable and safety course. Thus, this study aims to suggest the basic data to improve remodeling of apartment house considering residents' safety on the point of greenness, because of preventing social issue such as sick house syndrome, creating comfortable interior space, deducing indiscreet remodeling, and developing sustainable construction, through grasping customers' demand, and analyzing the correlation between remodeling status and residents' attitude survey of sick house syndrome.
A Study on the Safety Assessment of Curved Hollow RC Slab Bridge Structures
Chai, Won-Kyu ; Jo, Byung-Wan ; Kim, Kwang-Il ;
Journal of the Korean Society of Safety , volume 21, issue 6, 2006, Pages 96~100
In this thesis, the crack investigation, the damage investigation, the drawing check, and the structural analysis were performed on a curved hollow RC(reinforced concrete) slab bridge structure to assess the structural safety of that. From the crack investigation result, main reason of crack occurrence is guessed with travelling of the large truck. Therefore reinforcement of slab structure is necessary by using the steel plate. When structural analysis, the straight beam model, the curved beam model, and the curved plate model is used. From the results of structural analysis for curved hollow RC slab bridge, the maximum bending moment and the maximum shear force was not a difference in each models. But the vertical displacement of mid span using the curved beam model was greater than that using the other models.
The Effect and Management of the Ergonomics Program for the Prevention of WMSDs in a Shipbuilding Industry
Kim, Yu-Chang ; Chang, Seong-Rok ;
Journal of the Korean Society of Safety , volume 21, issue 6, 2006, Pages 101~105
Importance of the work-related musculoskeletal disorders(WMSDs) has been increasing in the manufacturing industry such as the domestic shipbuilding industry and car industry. Recently, companies have implemented the risk factor investigation due to the amendment of the industrial safety and health law in 2003. At the same time, some large companies have introduced and implemented an ergonomics program for WMSDs. Yet, until now a study of the effect and management of the ergonomics program has not been conducted. In 2005, we audited an ergonomics program in a domestic shipbuilding company four times for 9-month period. The company implemented an ergonomics program from 2003 to 2005. From the investigation, this paper reveals the effects and problems of the ergonomics program implemented by the company and presents methods for its improvement. The findings described in this paper will help the companies to implement their ergonomics program for WMSDs in the future.
A Survey on the Subjective Symptoms and Risk Factors of Musculoskeletal Disorders in Dentists
Choi, Myung-Gwan ; Choi, Sang-Bock ; Cha, Sang-Eun ;
Journal of the Korean Society of Safety , volume 21, issue 6, 2006, Pages 106~115
The purpose of this study is to provide basic data for continuing study in order to accomplish preventive countermeasures for work-related musculoskeletal disorders(WMSD) and to examine related factors in connection with each other as: the working environment, the equipment used, working method, pain symptoms of dentists. The investigation period for this study was from November 1, 2004 to February 28, 2005, and we analyzed questionnaire survey of 190 dentists who were giving medical treatment in and around the metropolitan area and Daegu City. Also, we visited 20 dental hospitals personally and examined the work posture through check lists, interviews, and field investigations on work posture using photos and videotaping. This study showed the increasing physical burdens which were related to dentists work accomplishment and attitude, recognizing pain which were affecting work related WMSD. With the access of ergonomics and improving the education and training of awkward medical treatment methods and posture, and continuous public information about WMSD, the occurrence rate of WMSD could be decreased.
Determination of Cutting Parameters Considering Machining Safety in Milling Operation
Park, Byoung-Tae ;
Journal of the Korean Society of Safety , volume 21, issue 6, 2006, Pages 116~121
In metal cutting processes, cutting conditions have an influence on reducing the production cost and deciding the quality of a final product. Process planners usually make modification to recommended cutting parameters obtained from machining data handbooks in order to satisfy requirements for individual operation. The modified cutting parameters also need to be examined for the safe machining. In this paper, a new operation planning system that allows the generation and check of modified cutting parameters is proposed for the milling process. A neural network methodology is introduced to identify mathematical models for generation of the modified cutting parameters, and several simplified rules and equations are presented for the check of the cutting parameters. Finally, the results are demonstrated with an example part.