A Study on Ground Acceleration Amplification Characteristics of Sea Dike according to the Seismic Wave Characteristics = A Study on Ground Acceleration Amplification Characteristics of Sea Dike according to the Seismic Wave Characteristics

다국어 초록 (Multilingual Abstract)

Earthquakes have become more frequent in South Korea of late, and the earthquake damage is clearly different depending on how to prepare for it, so there is a strong need to construct seismic infrastructures. As the seismic behavior of sea dike is very complicated, there is a dearth of actual cases of seismic behavior analysis and ground liquefaction evaluation. Damages like seismic ground displacement and liquefaction differ according to the seismic acceleration amplification characteristics. Thus, the ground acceleration amplification characteristics in the sea dike were analyzed according to the seismic waver characteristics (short cycle, long cycle, artificial seismic wave). To define the ground acceleration amplification characteristics according to the seismic wave characteristics, ground response analysis of the areas surrounding the sea dike was conducted, and 3D numerical analysis of the sea dike was conducted. Based on the ground investigation data, the representative ground cross-section and the ground parameters were set. Ground response analysis was conducted according to the input seismic waves, so as to analyze the ground acceleration amplification characteristics. 3D modeling was performed to analyze the earth-behaving sea dike. Dynamic analysis was conducted using the linear time history analysis method, and the displacement and ground acceleration were analyzed at the top of the sea dike. The findings of this study are expected to be used to evaluate the ground acceleration amplification characteristics and the possible liquefaction during earthquakes above the design earthquake level in sea dike, and to reduce the subsequent danger.