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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 1, Issue 3 - Dec 2001
Volume 1, Issue 2 - Sep 2001
Volume 1, Issue 1 - Jun 2001
Selecting the target year
Diagnostics of Truss Structures via Vibration Monitoring
Park, Soo-Yong ; Kim, Jeong-Tae ; Kim, Yeon-Bok ;
Journal of Korean Society of Hazard Mitigation, volume 1, issue 2, 2001, Pages 63~74
In this paper the feasibility of Nondestructive Damage Detection (NDD) in large structures is demonstrated via simulating vibration monitoring of such structures. The theory of NDD for truss type structures is formulated. To examine the feasibility of the theory, a finite element model of a 3-D truss structure, which consists of sixteen bays and includes 246 elements, is developed to simulate damage. Four damage cases are simulated numerically and the cases range from the structure being damaged in one location to the structure being damaged in three locations. For the given modal parameters, this study reveals very good results for small amounts of damage as well as large damage.
An Analysis of Runoff Characteristics at Creeks
Jung, Jae-Wook ; Yoon, Sei-Eui ;
Journal of Korean Society of Hazard Mitigation, volume 1, issue 2, 2001, Pages 75~83
In this study, the maintenance problems were investigated through checking the creeks which were improved by close-to-nature river improvement technique. The characteristics of flow were measured at Changsa Creek in Suwon city. The computational results of numerical model with kinematic wave theory was evaluated through observation data about precipitation, velocity, and flow depth. Furthermore, SCS, Clark, and RRL models were compared to the actual observations. As a result, the kinematic wave theory's calculated peak time of discharge concentration occurred little earlier than the actual observation, but the tendency of hydrograph coincided with observation.
A Study on the Estimation of the Urbanization Using GIS and Its Effect on the Runoff
Kang, Sang-Hyeok ; Kwon, Jae-Hyuk ; Jun, Byung-Duk ;
Journal of Korean Society of Hazard Mitigation, volume 1, issue 2, 2001, Pages 85~92
The flood damage due to heavy rainfall caused by not only geographical factor, but also social factors. In this paper we derived the flooding potential factors, and analyzed resident's understanding of flooding through the Tokai disaster of Japan, occurred in september 2000. Furthermore, the urban rate obtained by the data comparison between 1975 and 1985 using GIS is evaluated to estimate the effect of rainfall-runoff mechanism due to the urbanization. These efforts could be served as the information of flood damage for the communication with the residents and it would be helped the minimization of flood damage.
Long-term Behavior of FCM Bridges considering Seasonal Temperature Variation - Part 1
Lee, Son-Ho ; Lee, Hak-Eun ;
Journal of Korean Society of Hazard Mitigation, volume 1, issue 2, 2001, Pages 93~101
The objective of this study is to derive a shrinkage correction formula that considers temperature effect and to develop a methodology for the improved prediction of the long-term behavior of the FCM bridges by considering seasonal temperature variations in-situ. Thereby, current formulation were performed by using the actual experimental shrinkage data including seasonal temperature variation. The investigation of the long-term behavior of the FCM bridge was performed on the construction site in order to decide applicability of the shrinkage formula Numerical results by the general method indicates inaccurate values of total strain when considering real strain, whereas the applied method demonstrates a good agreement in the resultant strain. In consequently, the applied method will improve the prediction of the long-term deformation of the FCM Bridges.
An Analysis and Design on the Anchorage of PSC Box Girder
Im, Jung-Soun ; Bahang, Yun-Suk ; Lee, Soo-Keun ;
Journal of Korean Society of Hazard Mitigation, volume 1, issue 2, 2001, Pages 103~114
As the results of comparison with several anchorage design methods of PSC box girder, stress superposition effect by the order of prestressing force can't be considered in the case of multi-anchorage design with existing design methods. In anchorage design by 3-D finite element analysis, estimation of stress concentration region and stress flow are correctly defined, but the estimation of sectional forces in anchorage is very complicated. In the case of anchorage design by strut-tie model method, the stress superposition effect can be considered and sectional forces in anchorage are easily calculated. Therefore, strut-tie model method is remarkably suitable to anchorage design if geometrical conditions of the truss members are carefully considered.
A Study on the Stochastic Modeling for Stream Flow Generation
Lee, Joo-Heon ;
Journal of Korean Society of Hazard Mitigation, volume 1, issue 2, 2001, Pages 115~121
The purpose of the synthetic generation of monthly river flows based on the short term observed data by means of stochastic models is to provide abundant input data to the water resources systems of which the system performance and operation policy are to be determined beforehand. In this study, a multivariate autoregressive model has been applied to generate monthly flows of the multi sites considering the correlations between each site. The model performance was examined using statistical comparisons between the historical and generated monthly series such as mean, variance, skewness and correlation coefficients. The results of this study showed that the modeled generated flows were statistically similar to the historical flows.
Empirical Application for the Urban Disaster Risk Assessment : Fire, Facility and Escape Cases in Cheongju City
Hwang, Hee-Yun ; Baek, Ki-Young ; Park, Byung-Ho ; Lee, Man-Hyung ; Hwang, Jae-Hoon ; Ryu, Eul-Leal ; Kim, Tae-Hwan ;
Journal of Korean Society of Hazard Mitigation, volume 1, issue 2, 2001, Pages 123~137
Based on basic characteristics of urban disasters and their data availabilities in Korea, this study provides risk assessment models which are derived from Cheongju examples. In specific, the application models are confined to fire, facility and escape risk survey results in the paper. For the assessment criteria, major independent variables for the categories of fire include both the frequency levels and the amount of damage. And the degree of facility risk assessment is heavily hinged on both the weighted values of key facilities and their weighted rank-sizes. In the same context, the degree of escape risk assessment is hinged on both the weighted values and the amount of the classification of land. From the empirical configuration, this paper presents that the potential figure of fire risk is relatively higher in the built-up areas within the existing Central Business District where accommodates a number of dilapidated housing units and community-supportive facilities. In contrast, the potential figure of facility and escape risk is higher in both old residential areas and the newly-built apartment complex. In short, the CBD and its neighboring residential areas record a high potential figure in terms of total risk, juxtaposing fire, facility and escape risk all together.