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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Journal of the Korean Society of Safety
Journal Basic Information
Journal DOI :
The Korean Society Safety
Editor in Chief :
Volume & Issues
Volume 20, Issue 4 - Dec 2005
Volume 20, Issue 3 - Sep 2005
Volume 20, Issue 2 - Jun 2005
Volume 20, Issue 1 - Mar 2005
Selecting the target year
A Study on the FEM Analysis of Maraging Steel according to Nb content
Choi, Byung-Ky ; Choi, Byung-Hui ; Kwon, Tack-Yong ;
Journal of the Korean Society of Safety , volume 20, issue 4, 2005, Pages 1~8
Effects of Nb(Niobium) contents and solution annealing on the strength and fatigue life of 18%Ni maraging steel commonly using in aircraft, space field, nuclear energy, and vehicle etc. were investigated. Also the fatigue life stress intensity factor were compared experiment result and FEA(finite element analysis) result. The more Nb content, the higher or the lower fatigue life on base metal specimens or solution annealed specimens showing that the fatigue lift was almost the same. The maximum stresses of X, Y, and Z axis direction showed about
respectively. The Y direction stress showed the highest because of the same direction as the loading direction. The fatigue lives showed about 7% lower FEA result than experiment result showing almost invariable error every analyzed cycle. Stress intensity factor of the FEA result was lower about
than that of the experiment result showing that the longer fatigue crack length the higher error. It considered that the cause for the difference was the modeled crack tip having always the same shape and condition regardless of the crack growth.
A Numerical Study on Smoke Exhaust at a Underground Room Fire
Ko, Kyung-Chan ; Park, Woe-Chul ;
Journal of the Korean Society of Safety , volume 20, issue 4, 2005, Pages 9~13
A underground room fire was simulated to investigate the effects of smoke exhaust on temperature visibility, soot etc. in the room. A room of
with a door of
and a 0.5MW polystyrene fire in the room were considered. Temperature, visibility, CO volume fraction and soot were compared for the exhaust velocity at a vent located at the ceiling, 0, 1.2, and 2.4m/s, respectively. Results showed that increasing exhaust velocity decreased room temperature, CO and soot and increased visibility.
The Effect of Surface Protective Material on the Impact Resistance in Filament Wound Composite Pressure Vessel
Kang, Ki-Weon ; Kim, Young-Soo ; Lee, Mee-Hae ; Choi, Rin ;
Journal of the Korean Society of Safety , volume 20, issue 4, 2005, Pages 14~19
One area in which composites have been used rather extensively is for fabricating pressure vessel. These structures can be readily manufactured by filament winding, which is, as far as composite fabrication techniques are concerned, a relatively inexpensive method for producing composite structures. Unfortunately, the higher strength material and fabrication costs are not the only disadvantages of fiber-reinforced polymer composites when they are compared to metals. Additionally, these materials tend to exhibit brittle behavior. This is of particular concern when they are subjected to a low-velocity impact during routine handling a significant amount of structural damage can be introduced into the composites. The goals of this paper are to understand the impact damage behavior and identify the effect of surface coating materials on impact resistance in filament wound composite pressure vessels. For these, a series of low velocity impact tests was performed on specimens cutting from the full scale pressure vessel by the instrumented impact testing machine. The specimens are classified into two types with and without surface protective material. The visualization for impact damage is made by metallurgical microscope. Based on the impact force history and damage, the resistance parameters were employed and its validity in identifying the damage resistance of pressure vessel was reviewed. As the results, the impact resistance of the filament wound composites and its dependency on the protective material were evaluated quantitatively.
The Reliability Estimation of Buried Pipeline Using the FAD and FORM
Lee, Ouk-Sub ; Kim, Dong-Hyeok ;
Journal of the Korean Society of Safety , volume 20, issue 4, 2005, Pages 20~28
In this paper, the methodology for the reliability estimation of buried pipeline with longitudinal gouges and dent is presented and the limit state of buried pipeline is formulated by failure assessment diagram(FAD). The reliability of buried pipeline with defects has been estimated by using a theory of failure probability. The failure probability is calculated by using the FORM(first order reliability method) and Monte Carlo simulation. The results out of two procedures have been compared each other. It is found that the FORM and Monte Carlo simulation give similar results for varying boundary conditions and various random variables. Furthermore, it is also recognized that the failure probability increases with increasing of dent depth, gouge depth, gouge length, operating pressure, pipe outside radius and decreasing the wall thickness. And it is found that the analysis by using the failure assessment diagram gives highly conservative results than those by using the theory of failure probability.
Reflecting and Dielectric Characteristics of
Dielectric Systems due to the Contents of
Ryu, Boo-Hyung ; Kwon, Soon-Suk ;
Journal of the Korean Society of Safety , volume 20, issue 4, 2005, Pages 29~33
In this paper, reflectance and the dielectric characteristics for
system have been investigated as a function of contents of
. The reflectance was decreased with increasing the contents of
and the reflectance of
system was lowered than that of
system. The dielectric constant of
system was higher than
system, and the dielectric constant in the both system was increased with increasing of
contents. This can be explained as the space charge effects. These results are could be applied to the under plate dielectrics of PDP required high reflective ratio and breakdown strength.
A Study on Risk Assessment of Methyl Ethyl Ketone Peroxide
Mok, Yun-Soo ;
Journal of the Korean Society of Safety , volume 20, issue 4, 2005, Pages 34~39
To evaluate characteristics of explosion hazard of Methyl Ethyl Ketone Peroxide, MCPVT was used for this study. In result maximum explosion pressure and maximum explosion pressure rising velocity of MEK-PO were
. As a result or adding metal powder to estimate hazard of explosion, the maximum explosion pressure and maximum explosion pressure rising velocity according to adding Fe powder in MEK-PO increased. In opposite, those decreased resulting in adding Ca powder in MEK-PO.
Incombustibility of Polypropylene by Metal Addition Flame Retardant
Lee, Sang-Eun ; Song, Young-Ho ; Chung, Kook-Sam ;
Journal of the Korean Society of Safety , volume 20, issue 4, 2005, Pages 40~45
The principal actions of a flame retardant are to decrease or prevent the formation of volatile products and increase the formation of char layer. Use of flame retardant additives can decrease the overall fire hazard of the product containing them thus leading to an increase in overall fire safety. Although several flame retardants have been developed for use in polymers, many of these are known to increase the amount of smoke and toxic gases generated by them. This paper present a new flame retardant using metal addition flame retardant. For this study, the experiments of flame retardancy conducted are as follows : burning ratio, weight loss rate using TGA-DTA, the measurement of LOI and char yield. And smoke mass concentration and CO yield were measured. The metal addition flame retardant reduced burning ratio and weight loss rate, increased the LOI and yield of char formation with decreased smoke mass concentration and CO yield.
Temperature Strength of Sawdust-Mixing Concrete
Son, Ki-Sang ; Hong, Seung-Ryul ;
Journal of the Korean Society of Safety , volume 20, issue 4, 2005, Pages 46~53
Existing study far fire-resistant concrete has been done already. but it is not found out how the waste tyre mixing concrete will be acted against fire. This waste tyre concrete molds under the condition of
were heated in gas oven. It was worried about that they might be fractured down at about
so that they can not be tested. compressive strength for the test molds are made with commercially used
mixing saw dust with proportion such as 0.05%, 0.1%, 0.2%, 0.4%, 0.6%, 0.8%, 1.0%, 1.2%, 1.4%, 1.6%, 1.8%, 2.0% compressive strength at
was approximately 20% from the original, while approximately 30% deoreased at
. their results are not quite different from the normal concrete condition even though they contains saw dust in it. The higher strength the concrete has, the less strength was decreased. There are almost no difference in strength under the condition of less than
, but damage of concrete structure could be considerable large with more than
Experimental Study on the Capacity of Holed RC Beam Mixed with Waste Tire Particles
Son, Ki-Sang ; Lee, Won-Gyun ;
Journal of the Korean Society of Safety , volume 20, issue 4, 2005, Pages 54~62
This Study is to find out how RC beam mixed with sawdust acts comparing with normal beam without sawdust mixture, and how they can be applied to the actual structural frame, despite a Int that they are mixed with waste material : saying sawdust. ED3H1, ED3H2, ED5H1, ED5H2, ED3H1UB, ED5H1UB, ED3H2L, ED5H2L and Normal without sawdust mixture are main factor to be tested here in order to apply them to the actual case. D and H means diameter 3cm or 5cm, and holes one and two respectively. And all variables are tested with each two for one variables. Test results are compared using crack diagrams and strain & loads. There are eleven(11)% capacity decrease between ED 3H1 and ED5H1 in rebar, strain. Left and right side crack shapes are much similar in variable ED3H2L having maximum capacity 14.5 tone. ED5H2L having maximum capacity thirteen(13)tone, in case of normal 19.6 tone. Two holes in beam rather on the longitudinal direction than on the forcing direction can be more effective to keep the original capacity of the beam because this case can distribute load more uniformly. There is 33% capacity decreased in case of diameter five(5)cm, compared to diameter three(3)cm. Two holes give thirty nine(39) percent capacity decrease than one of diameter three(3)cm.
Development on the Selection of Green Construction Materials for Residental Safety
Song, Hyuk ; Chung, Woo-Yang ;
Journal of the Korean Society of Safety , volume 20, issue 4, 2005, Pages 63~70
It has been used so many kinds of architectural materials and interior products in current building construction, and use of composite architectural materials is increasing with the development of chemical technology. As the green architecture has become the center of public interest, much effort is conducted in advanced countries on the LCA point of view, such as restriction of architectural materials that emitting pollution substances, developing of Non-Toxic architectural materials, and recycling of used materials, etc. with the cooperation of related organizations, material manufacture companies, and construction companies. Because the kinds of materials to be used in building constructions are so various, there might be some possibility of personal and subjective choice at the time of materials selection resulting the missing the requirements of building components and the choice of harmful materials to human. One way to resolve the material problem is to present the green architectural materials which coincide with the quality performance at service and not harmful to man and nature. At this point of view, this study aims to develop the material classification model by investigating the major labelling system about green architectural materials in both domestic and abroad and to implement an efficient material selection system by making a powerful database of environmental standard and quality basis of building requirements.
A Development on the Safety Management Information System in Building Work
Park, Jong-Keun ;
Journal of the Korean Society of Safety , volume 20, issue 4, 2005, Pages 71~77
There are insufficient models that find problems and solutions for accident prevention through risk assessment and suggest safe work process and work instruction from foundation works to finish work for accident decrease. This paper presents a quantitative risk assessment model by analysis of risk factors in each process such as foundation, erection, structure, equipment finish and etc based on accident examples and investigation on actual condition in building. In addition, the safety management system was developed to perform risk assessment of construction and use it for effective safety training for labor.
Analysis of Cantilever Cylindrical Shells with Edge-Stiffeners
Park, Weon-Tae ; Son, Byung-Jik ;
Journal of the Korean Society of Safety , volume 20, issue 4, 2005, Pages 78~86
In this study, cantilever cylindrical shells with edge-stiffeners are analyzed. A versatile 4-node flat shell element which is useful for the analysis of shell structures is used. An improved flat shell element is established by the combined use of the addition of non-conforming displacement modes and the substitute shear strain fields. Three models by load conditions are considered. Model A, B and C are loaded by point load at the free edge, line load and external pressure respectively. A various parameter examples are presented to obtain proper stiffened length and stiffened thickness of edge-stiffeners. It is shown that the thickness of shell can be reduced more than 50% for Model A, about
for Model B by appropriate edge-stiffeners.
Safely Improvement Program for High-Rise Office Building Management
Lee, Yong-Sam ; Choi, Jong-Soo ;
Journal of the Korean Society of Safety , volume 20, issue 4, 2005, Pages 87~96
In the construction industry, most safety related researches have been focused on the safety matters in construction job site while the safety issues regarding facility management have been received limited attention. Hence, this research aimed to uncover the problems of current safety management practices then suggest improvement plans. Through the questionnaire suey and analysis, following conclusions were drawn. Regarding the safety mindset, participation rate in safety prevention activities is average at most. Therefore, the extra attention and effort by property owners and managers are required. Examination of accidents indicated that 88% of them were stemmed from unsafe activities, 10% from unstable mentality and 2% from unavoidable natural disasters. Therefore, 90% of these accidents could be prevented by eliminating unsafe activities. In addition to the above findings, several other facts and suggestions are detailed.
A Study on the Types and Solves Plan of Popular Complaint by Construction Work Types - Focus on the Gwang-Ju City -
Song, Hyuk ; Go, Seong-Seok ; Park, Hyeon-Ku ;
Journal of the Korean Society of Safety , volume 20, issue 4, 2005, Pages 97~105
As construction project is becoming larger, construction progress and works are more various and complex according to recent Korean construction tendency. The growth of construction induces much pollution on the progress of construction and the problems due to the construction pollution are raised into social problem strongly, because it is increasing the need on the quality of lift and the desire of clean environment. This study aimed to seek far the effective solving plan of the construction popular complaints by surveying the real condition of construction popular complaints and analyzing the cause and tansaction period of popular complaints. For this study, the laws related and popular complaints were analysed focusing on the documents in low district offices of Gwangju from 2000 to 2004. As a result, the types of construction popular complaints were divided into 17 and the causes were as follows in order: crack and subsidence of ground(14.90%), infringement of private life(11.55%), noise(10.80%), infringement of a right to sunshine(10.07%) and breakdown(6.7%). Consequently, it is considered that these complaints are occurred by physical and environmental causes.
A Study on the Safety Consciousness of Resident for the Environmental Factors in Apartments
Park, Hyeon-Ku ; Song, Hyuk ; Go, Seong-Seok ;
Journal of the Korean Society of Safety , volume 20, issue 4, 2005, Pages 106~113
The housing is a human's basic space and the comfort and the safety are the most basic conditions. According to the flow of age for Well-Being since the 21th, the suppliers and the users of apartment are making best effort now for the embossment of green environmental quality of apartment, and outstretch their hands for marketing strategic purposes in a side of indoor and outdoor environment with distinctive elements. But these supply and use are on progress competitively with the simple distinction, it is thought that indoor and outdoor environment are must be promoted according to the survey of residents' consciousness. So this study aims to provide basic materials with residents for the promotion of comfortable dwelling environment by solving the basic safety problem and also aims to survey and analyze the residents' safety consciousness in object of physical and non-physical environmental quality of indoor and outdoor of apartment by analyzing indoor air quality pollution, the feeling of being victimize caused by air pollution and safety consciousness according to physical environment elements.
Cognitive Analysis on Accident-related Human Factors during Shunting Movements
Lee, Seung-Won ; Lim, Hyeon-Kyo ;
Journal of the Korean Society of Safety , volume 20, issue 4, 2005, Pages 114~121
Railroad shunting movements connecting and disconnecting train sets are very susceptible to human errors since they depend on human decision-making and action procedure that are variable to situation to situation. Nevertheless, in the investigation of railroad accidents, all the accident causes related with human factors have merely been categorized as 'careless treatment' of the workers without any systematic approach of behavioral sciences or the analysis of human errors. In this research, therefore, 137 accident cases occurred during railroad shunting movements and 435 accident cases occurred during driving were analyzed with a special interest of human errors. According to results, the traditional accident investigation scheme used for last several decades did not seem to be appropriate for catching up true accident causes with respect to human errors. In addition, both signal men and locomotive drivers made many mistakes in judgement/action stage while the former mainly commit judgement tasks where as the latter mainly commit cognition tasks. Ant those tasks such as 'confirmation of signal and route', 'location check-up of connected train sets', and 'route identification for a shift of track' ranked highly for accident susceptibility.
The Relationship Between Safety Climate and Safety Performance, and the Moderating Effect of Age
Ahn, Kwan-Young ;
Journal of the Korean Society of Safety , volume 20, issue 4, 2005, Pages 122~129
With Zohar(1980)'s research on safety climate and industrial safety, occupational safety and health literatures begin to emphasize the influence of organizational context. Based on this research trend, this paper tried to review the relationship between individual/ organizational factors and occupational accidents. Based on the responses from 294 manufacturing workers, this paper reviewed the relationships among safety climates, safety performance, and age. The results of statistical analysis showed that all safety climate factors have affirmative effects on safety participation and safety attitudes negative effect on accident number, and job load affirmative effect on accident number. Job load and management commitment showed interactive effects on accident number with age.
A Feature Analysis of Industrial Accidents Using C4.5 Algorithm
Leem, Young-Moon ; Kwag, Jun-Koo ; Hwang, Young-Seob ;
Journal of the Korean Society of Safety , volume 20, issue 4, 2005, Pages 130~137
Decision tree algorithm is one of the data mining techniques, which conducts grouping or prediction into several sub-groups from interested groups. This technique can analyze a feature of type on groups and can be used to detect differences in the type of industrial accidents. This paper uses C4.5 algorithm for the feature analysis. The data set consists of 24,887 features through data selection from total data of 25,159 taken from 2 year observation of industrial accidents in Korea For the purpose of this paper, one target value and eight independent variables are detailed by type of industrial accidents. There are 222 total tree nodes and 151 leaf nodes after grouping. This paper Provides an acceptable level of accuracy(%) and error rate(%) in order to measure tree accuracy about created trees. The objective of this paper is to analyze the efficiency of the C4.5 algorithm to classify types of industrial accidents data and thereby identify potential weak points in disaster risk grouping.
Accident Analysis of Second Daegu Subway Line During its Construction Period
Lee, Yong-Tae ; Shin, Sung-Heon ; Son, Byung-Chang ;
Journal of the Korean Society of Safety , volume 20, issue 4, 2005, Pages 138~147
The accidents which occurred between during february of 1997 to December of 2004 at the 2nd Daegu subway construction site have been classified. The accident types of injuries include accidental falls, falling objects which consist 53.4% of all accidents. This result is higher than the same types of accidents occurring at construction sites which are 46.3%. It was found that the 3.4 times more accidents are caused from safety measures and working methods than problems caused by lack of supervision. 78.0% of the accidents occurred at stations and at the ventilation area. 31.9% of the accidents occurred when the operation was near completion(
) which means there was pressure to complete the operation to meet the set due date. In the case of 50.0% of the accidents were caused by workers with less than two month work experience. And lumbago is 6.9%, especially lumbago didn't showed before. Maybe accident should increase if not reduce a possibility of danger. In this study a literature search has been conducted for the cause of these accident types and respective suggestions are provided.
A Study on Evaluation of Neck Muscle Workload in Static Work Using EMG
Kim, Yu-Chang ; Jeong, Hyun-Wook ; Jang, Seong-Rok ;
Journal of the Korean Society of Safety , volume 20, issue 4, 2005, Pages 148~153
Computer dominated jobs and industrial automation have rapidly created work-related musculoskeletal disorders(WMSDs) and WMSDS are expanding to employee of other general industry. Specific risk factors associated with WMSDs include repetitive motion, heavy lifting, forceful exertion, contact stress, vibration awkward posture and rapid hand and wrist movement. The purpose of this paper is to analyze the effects of the neck muscle workload according to posture(joint angle) and load weight. Seven male students participated in this study. To analyze neck muscle workload was studied on electromyographic(EMG) activity for sternocleidomastoid and trapezius, was subjectively rated using a Borg's CR-10 scale. ANOVA showed that the CR-10 ratings and most EMG root-mean-square (RMS) value were statistically significant improvement according to posture(joint angle) and load weight. The results of this study indicate the joint angle and weight of neck muscle workload to provide safe working conditions. To reduce the large number and severity of WMSDs employees have been experiencing, we need to redesign the job in workplace to identify and control hazards that are reasonably likely to be causing or contributing to the WMSDs.
A Study on the Network of Civilian, Enterprise, School and Government Sectors for Disaster Management
Sung, Ki-Whan ;
Journal of the Korean Society of Safety , volume 20, issue 4, 2005, Pages 154~161
As disasters in the modem era become a large scale and complexity, no single entity can manage them. Instead collective cooperation between civilian, enterprise, school and government sectors is significantly needed, along with a well prepared mechanism. Thus, I attempt to construct the applicable network of civilian, enterprise, school and government sectors for disaster management through exemplary case studies of established countries as well as Korea's current operations and its drawbacks, based upon a networking design of disaster management organizations as belows: Firstly, it is cooperation and coordination among relevant organizations that are required essentially in the new era, in view of formative condition of necessary environment for civil participation. The cooperation and coordination can be made only through the network of civilian, enterprise, school and government sectors. Secondly, in order to build up the network, major roles and tasks which should be done by civilian, enterprise, school and government sectors respectively are listed based upon a stage of disaster management. Thirdly, operation models of a safety monitoring unit, a disaster prevention unit, a emergency response unit, and a rehabilitation unit are proposed in line with the network of civilian, enterprise, school and government sectors in regional base.
Study for Safety Satisfaction and Expectation, Satisfactioon, and Revisit of Mega-Event Participation: for Structural Equation Model
Kwon, Young-Guk ; Park, Hyun-Jee ;
Journal of the Korean Society of Safety , volume 20, issue 4, 2005, Pages 162~170
The effective development of event product for a successful event is first started with figuring out the participation motive of event. Second, what level of expectation before participating event for participant will have. Third, what level of satisfaction and safety satisfaction based on figured out motive and expectation will participant have. Fourth, what level of revisit based on satisfaction will have. The study is needed for these low items. Therefore, this investigation started as an exploratory study for a successful event to analysis the relationship among expectation satisfaction, safety satisfaction and revisit. The results indicated that participated motive is positively influenced on expectation. The expectation is positively influenced on safety satisfaction. The satisfaction is positively influenced on revisit. Finally, the safety satisfaction is positively influenced on revisit. The unique characteristics of this study is considered a safety satisfaction as m event safety and as an important factor when terror becomes often these days.
A Study of a Heat Flux Mapping Procedure to Overcome the Limitation of Heat Flux Gauges in Fire Tests
Choi, Keum-Ran ;
Journal of the Korean Society of Safety , volume 20, issue 4, 2005, Pages 171~179
It is essential to understand the role of wall lining materials when they are exposed to a fire from an ignition source. Full-scale test methods permit an assessment of the performance of a wall lining material. Fire growth models have been developed due to the costly expense associated with full-scale testing. The models require heat flux maps from the ignition burner flame as input data. Work to date was impeded by a lack of detailed spatial characterization of the heat flux maps due to the use of limited instrumentation. To increase the power of fire modeling, accurate and detailed heat flux maps from the ignition burner are essential. High level spatial resolution for surface temperature can be provided from an infrared camera. The objective of this study was to develop a heat flux mapping procedure for a room test burner flame to a wall configuration with surface temperature information taken from an infrared camera. A prototype experiment was performed using the ISO 9705 test burner to demonstrate the developed heat flux mapping procedure. The results of the experiment allow the heat flux and spatial resolutions of the method to be determined and compared to the methods currently available.