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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 6, Issue 4 - Dec 2006
Volume 6, Issue 3 - Sep 2006
Volume 6, Issue 2 - Jun 2006
Volume 6, Issue 1 - Mar 2006
Selecting the target year
Analysis of Regional Seismic Characters for Establishing Seismic Zone Factor
Kwon, Ki-Hyuk ; Hwang, Wan-Seon ; Seo, Chee-Ho ;
Journal of Korean Society of Hazard Mitigation, volume 6, issue 3, 2006, Pages 1~8
The seismic zone factor is evaluated according to the regional characteristics of seismic response based on the historical and instrumental earthquake data. This study aims at arranging regional seismic characteristics by the analysis of earthquake data recorded in the Korean Peninsula and providing the fundamental data to be used for establishing seismic zone factor considering the domestic seismic characteristics. This paper provides the seismic characteristics in the Korean Peninsula according to the historical and instrumental records and then presents fundamental data for establishing seismic zone factors in domestic region.
Stress Measuring Method for Beam-Column Members with Long Gauge Fiber Optic Sensors
Park, Hyo-Seon ; Baek, Jae-Min ; Lee, Hong-Min ;
Journal of Korean Society of Hazard Mitigation, volume 6, issue 3, 2006, Pages 9~16
In structural health monitoring, the safety of structural members are assessed by the level of stress measured by various strain sensors based on different sensing mechanisms. Since most existing strain sensors used for health monitoring system can cover a relatively small range of structural members, it is very difficult to measure the maximum value of the member subjected to varying amount and types of loads with those point sensors. The reliability of assessed safety of a member may be improved by increasing the number of sensors. It may not be also realistic to increase the number of sensors to overcome these drawbacks. In this paper, a stress measuring method for beam-column members is developed by estimating the maximum stress based on the average strains obtained from long gauge sensor. The average strain from long gage fiber optic sensor is transformed into the maximum strain by multiplication of the modification factor derived in this research.
Assessment Model for the Safety and Serviceability of Structures using Terrestrial LiDAR
Lee, Hong-Min ; Park, Hyo-Seon ;
Journal of Korean Society of Hazard Mitigation, volume 6, issue 3, 2006, Pages 17~28
Structural health monitoring is important to maintain the safety and serviceability of the structures. The displacement in the structure should be precisely and frequently monitored because it is a direct assessment index indicating its stiffness. However, no practical method has been developed to monitor such displacement precisely, particularly for high-rise buildings and long span bridges because they cannot be easily accessible. To overcome such difficult accessibility, we propose to use a LIDAR system that remotely samples the surface of an object using laser pulses and generates the coordinates of numerous points on the surface. In this study, using terrestrial LiDAR, we develop a novel displacement measuring model for structural health monitoring and perform an indoor experiment to prove its performance.
Earthquake Response Analysis of Bridges Using Fiber Element Method
Byun, Soon-Joo ; Im, Jung-Soon ;
Journal of Korean Society of Hazard Mitigation, volume 6, issue 3, 2006, Pages 29~35
Fiber element method in earthquake response analysis of bridges is used to represents a realistic flexural deformation according to nonlinear behavior of beam-column section. Nonlinear pseudo-static analysis of two column bent using fiber element is accomplished and failure mechanism of the plastic hinge region is studied. Load-displacement curve obtained by nonlinear pseudo-static analysis can be applicable to earthquake response analysis by capacity spectrum method. The nonlinear time history analysis of a full bridge model using fiber element experienced by the ground motion corresponding to the target response spectrum is accomplished. The result of time history analysis is similar to that of capacity spectrum method.
Assessment of Ductility and Plastic Hinge Region of Reinforced Concrete Multi-Column Bent
Byun, Soon-Joo ; Im, Jung-Soon ;
Journal of Korean Society of Hazard Mitigation, volume 6, issue 3, 2006, Pages 37~45
In this study, displacement ductility capacity and plastic hinge regions of reinforced concrete multi-column bent with different transverse reinforcement ratio are investigated. The ductility increases remarkably as transverse reinforcement ratio increase and the multi-column bent loaded along transverse direction is more ductile. The plastic hinge length for special detailing requirements of transverse reinforcement is estimated. For high target ductility, plastic hinge length for confinement should be extended with increased transverse reinforcement ratio. The plastic hinge length of multi-column bent loaded along transverse direction is shorter than that along longitudinal direction, because of the different moment distribution.
Relationship between Meteorological Elements and Aerosols Number Concentration at Gosan, Jeju for
Lee, Myoung-Joo ; Oh, Sung-Nam ; NhoKim, Eun-Yun ; Chang, Ki-Ho ;
Journal of Korean Society of Hazard Mitigation, volume 6, issue 3, 2006, Pages 47~56
With the aim to develop the monitoring technology on background atmosphere and climate change over Korean Peninsula, observations and studies on chemical, physical and optical properties of the atmospheric aerosols are made. Aerosol number concentration are measured with Optical Particle Counter from 2001 to 2003 at Gosan for 8 size intervals from 0.3 to
diameter range. For the seasonal variation, the number concentration of coarse particles in spring at Gosan was higher than other seasons due to the influence of sand storm in spring. There is no significant correlations between fine particles (
) and meteorological parameters, such as relative humidity, wind speed and visual range, while the correlation between the number concentration of small particles (
) and relative humidity showed a positive value. This trend was inversed for the case of wind speed: aerosol number concentration showed a small decreasing tendency with increasing wind speed for small particles but the high wind speed in winter season increased coarse particle concentration. Finally, Particles most efficient in light extinction were found to be at the size of about
An Analysis of the Temporal Pattern according to Hydrologic Characteristics of Short-Duration Rainfall
Lee, Jung-Sik ; Shin, Chang-Dong ; Chang, Jin-Wook ;
Journal of Korean Society of Hazard Mitigation, volume 6, issue 3, 2006, Pages 57~68
The objective of this study is to analyze the temporal pattern characteristic of short-duration rainfall defined as a rainfall durations of 6 hours or less by the Huff's 4th quartile distribution. To analyze the temporal pattern characteristic of short-duration rainfall, the rainfall data are classified by rainfall duration and rainfall type(Changma, Typhoon, Severe rain storm, Frontal storm) and change of rainfall segment. Also, the results of this study compared with result of research work of Korea Institute of Construction Technology(1989) and Ministry of Construction & Transportation(2000). The conclusions of this study are as follows; (1) Short-duration rainfall with duration of 6 hours or less is found to be most prevalent frist-quartile storms. (2) In the case of rainfall type, Changma and Severe rain storms and Frontal storm is found second-quartile storms, and Typhoon is found third-quartile storms. (3) In the result by change of sixth segment storms, the type of temporal pattern of rainfall is found to be most prevalent two sixth parts, (4) Comparative analysis of the results shows that shapes of the dimensionless cumulative curves and values are different from those of existing researches.
Analysis of Inundation Characteristics for EAP of Highway in Urban Stream - Dongbu Highway in Jungrang Stream -
Lee, Jong-Ta ; Jeon, Won-Jun ; Hur, Sung-Chul ;
Journal of Korean Society of Hazard Mitigation, volume 6, issue 3, 2006, Pages 69~76
An hydraulic and hydrologic analysis procedure was proposed to reduce the inundation damage of highway in urban stream, that could contribute the EAP and Traffic control planning of Dongbu highway in the Jungrang stream basin which is one of the representative urban area in Korea. We performed the HEC-HMS runoff analysis, and the UNET unsteady flow modeling to decide the inundation reaches and their characteristics. The high inundation risk areas were of Emoon railway bridge and the Wollueng bridge, which are inundated in the case of 10 year and 20 year frequency flood respectively. We also analyze the inundation characteristics under the various conditions of the accumulation rainfall and the duration. Flood elevation at the Wolgye-1 bridge exceed over Risk Flood Water Level(EL.17.84 m) when the accumulation rainfall is over 250 mm and shorter duration than 7 hr. When neglecting backwater effect from the Han river, inundation risk are highly at the reach C2(Wolgye-1 br.
Jungrang br., left bank), C1(Wolgye-1 br.
Jungrang br., right bank), D(Jungrang br.
Gunja br.) in order, but when consider the effect, the inundation risk are higher than the others at the reach D2(Jungrang br.
Gunja br., left bank) and E(Gunja br.
Yongbi br.), which are located downstream near confluence.