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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 2, Issue 4 - Dec 2002
Volume 2, Issue 3 - Sep 2002
Volume 2, Issue 2 - Jun 2002
Volume 2, Issue 1 - Mar 2002
Selecting the target year
Development of Wireless Real Time River Water Quality Management System with GPS and GIS
Yi, Jae-Eung ; Ha, Sang-Min ; Lee, Jong-Kook ;
Journal of Korean Society of Hazard Mitigation, volume 2, issue 4, 2002, Pages 69~75
In this paper the development of a real time river water quality management system is described. This system can manage a river water quality fluctuation by finding out abnormal conditions quickly and exactly. The GIS based monitoring system collects various properties of river water quality through the wireless real time network. Tanchun, the first branch of the Han River was selected as the target basin of the system development. This system is composed of three parts - wireless real time field measuring system with a GPS receiver, a server computer and a GIS platform. After the first field test in Tanchun basin, the result showed the many possibilities of measuring various water quality properties in real time and storing the data and analyzing them within the GIS environment in real time in very efficient manners. It is expected that the developed system will contribute to the efficient management of a river water quality control and water quality related disaster prevention purposes.
재해로 인한 농작물의 생산비 피해액 산정
Shim, Kee-Oh ; Lee, Cheol-Kyu ;
Journal of Korean Society of Hazard Mitigation, volume 2, issue 4, 2002, Pages 77~85
Korean government compensates 100% for natural disaster relief fund to public facilities, and provides 70 percents to crops through unit price calculation. This study estimated disaster damage according to the standard production cost of crops. Disaster damage was estimated according to the unit price of crops. Those crops are lettuce, pumpkin, red pepper, spinach, tomato and cucumber. As a result, the ratio of natural disaster relief fund to damage was revealed as
with present method,
with suggested method. Suggested method is the first one considered damage ratio of crops, producer price and raising period.
A Study on the Deteriorations Mechanism of Timeworn Buildings in Seoul
Kwon, Ki-Hyuk ; Lee, Kyoung-Yong ; Yang, Hee-Suk ;
Journal of Korean Society of Hazard Mitigation, volume 2, issue 4, 2002, Pages 87~95
Because of the gravitation of population toward large cities, a number of buildings have been constructed since 1970's. They have been rapidly deteriorated as time passed by. Therefore the purpose of this paper is to present basic data on private buildings managed by the Seoul Metropolitan Government and to analyse deterioration factors of them as well as interrelation. And then, the results of this paper can be used to establish the policy of managing timeworn buildings. Through this study timeworn masonry buildings occupy the major part of timeworn buildings, which have almost structural instability, especially individual residence. Both structure type and building type have an interrelation with the deterioration grade. The structure grade have an interrelation with occupancy class more than structure type.
Formulation of Dynamic Vehicle-Bridge Interaction Problems
Yi, Gyu-Sei ;
Journal of Korean Society of Hazard Mitigation, volume 2, issue 4, 2002, Pages 97~116
In this papers, a finite element formulation is proposed for dynamic analysis of vehicle-bridge interaction problems under realistic loading conditions. Although the formulation presented in this paper is based on the consideration of only a single traversing vehicle, it can be extended to include several different bridge configurations. The traversing vehicle and the vibrating bridge superstructure are considered as an integrated system. Hence, although material and geometric nonlinearities are excluded, this introduces nonlinearity into the problem. Various vehicle models, including those with suspension systems, are considered. Traveling speed of the vehicle can be varied. The finite element discretization of the bridge structure permits the inclusion of arbitrary geometrical configurations, and surface and boundary conditions. To obtain accurate solutions, time integration of the equation of vehicle-bridge motion is carried out by using the Newmark method in connection with a predictor-corrector algorithm.
A Field Survey on the Risk Management Information System on the Underground Space - Focused on Fire Protection Assessment System on The Underground Shopping Mals -
Park, Jong-Keun ; Roh, Sam-Kew ;
Journal of Korean Society of Hazard Mitigation, volume 2, issue 4, 2002, Pages 117~122
A large number of accidents at an underground place have been happening, including the gas explosion under construction of subway, the fires of underground utility and underground shopping malls, and other explosion, at home and abroad recently. These accidents make the function of a city ineffective due to the paralyses of electricity and communications net as well as the loss of property, and cause people to feel unsecured with accompaniment of a heavy of toll of lives. This study suggests safety assessment items and fire protection assessment technique for underground shopping malls by extracting dangerous elements in the management stage through examination of related accidents, documents and present conditions.
A Study on Characteristics of Neural Network Model for Reservoir Inflow Forecasting
Kim, Jae-Hvung ; Yoon, Yong-Nam ;
Journal of Korean Society of Hazard Mitigation, volume 2, issue 4, 2002, Pages 123~129
In this study the results of Chungju reservoir inflow forecasting using 3 layered neural network model were analyzed in order to investigate the characteristics of neural network model for reservoir inflow forecasting. The proper neuron numbers of input and hidden layer were proposed after examining the variations of forecasted values according to neuron number and training epoch changes, and the probability of underestimation was judged by deliberating the variation characteristics of forecasting according to the differences between training and forecasting peak inflow magnitudes. In addition, necessary minimum training data size for precise forecasting was proposed. As a result, We confirmed the probability that excessive neuron number and training epoch cause over-fitting and judged that applying
training epochs might be suitable in the case of Chungju reservoir inflow forecasting. When the peak inflow of training data set was larger than the forecasted one, it was confirmed that the forecasted values could be underestimated. And when the comparative short period training data was applied to neural networks, relatively inaccurate forecasting outputs were resulted and applying more than 600 training data was recommended for more precise forecasting in Chungju reservoir.
Experimental Study on the Precast Concrete Joint using Re-bar Debonding and Cutting Technique
Yi, Waon-Ho ; Moon, Jung-Ho ; Lee, Yong-Jae ; Lee, Han-Jun ;
Journal of Korean Society of Hazard Mitigation, volume 2, issue 4, 2002, Pages 131~141
Precast concrete (PC) panels are often used as retaining walls to support soil pressure. In such a case, the panels should be connected at the location where PC panels meet with a buttress. However, it is not easy to provide enough development length for the reinforcing steels due to the limited width of the buttress. If it happens, the width of buttress should be increased as large enough although it is not desirable. The critical section required for providing the development length is always located where the flexural moment is maximum. Thus it is the place the buttress width ends. Also it is the place that the reinforcing steels stressed to maximum. However, it is possible to make differentiate between the maximum moment location and the most stressed location of reinforcing steels. It means that the most stressed location of reinforcing steels, the critical section, can be moved to the other place where the moment is not maximum. New critical location will have less moment than that of buttress width ends. In consequence, the development length would be longer than that of the typical way of construction. Debonding or cutting technique make it possible to reduce the moment strength of a section. Therefore reinforcing steels are debonded or cut to have a desired flexural strength at a desired place. In this study, five test specimens in full scale were erected to examine the effects of critical section movement in PC panel joints. Test parameters were the length variations of debonded and cut reinforcing steels. The test results showed that the debonding or cutting technique could be used to lengthen the development length in the joint of PC panels.