Geohazard Lab

Geohazard Lab
Professor Major Laboratory Tel. Site
Dong-yeop Kwak Earthquake Engineering Geohazard Laboratory
Engineering Building Ⅱ, Room 111
+82)31-400-4045 Geohazard Laboratory
The goal of Geohazard Laboratory research is to reduce damage on society by geo-hazard events. We collect natural hazard event case histories and analyze the damage trend using data-based and simulation-based studies. Topics of research interests include ground investigation, development of ground motion model, earthquake early warning, fragility analysis of infrastructure, machine learning, and liquefaction.
Research field Research contents Research result
Development of seismic fragility curve We develop empirical fragility curve collecting empirical data set including damage status and demands for series-system infrastructure such as railway and embankment. Numerical simulation is performed to fill the gap that the empirical fragility curve doesn’t cover. System fragility is studied considering correlation of capacity and demand for an infrastructure system Fragility curves with different damage level thresholds
 지진 취약도 곡선 개발
Proxy-based GIS site condition layer development Layers of site conditions such as VS30, VSsoil, and Zbedrock are developed correlating site condition values to proxy layers such as surface geology, topography, terrain maps. To expand data points, boring log information is also collated and VS-N relationship is developed. Ground motion model and site amplification model are developed using empirical ground motion data with these site condition data. 지진원-관측기록-지진관측소 간 관계설정 Seismogenic- Observation record-Seismic station : Setting of relation

한반도 광범위 레이어(고도, 경사, 수계, 지질) Wide layers of the Korean Peninsula (Elevation, Slope, Water system, Geological features)
Predicting intensity measures on free surface using measured ground motion in MEMS sensor in structures MEMS sensors are located inside of buildings for which motions include building response. The goal of this research is to find deconvolution functions from structures to the free surface to utilize MEMS sensor data for intensity measure estimation. 지표면 진도추정 절차 모식도
Diagram of the procedure for estimating the Surface of the earth

2019년 2월 10일 지진의 잔차 분석 결과
Results of the earthquake residual analysis on February 10, 2019.