|
Title |
Seismic Fragility of Bridge Considering Foundation and Soil Structure Interaction
|
|
Authors |
김선재(Sun-Jae Kim) ; 안효준(Hyo-Joon An) ; 송기일(Ki-il Song) |
|
DOI |
https://doi.org/10.11112/jksmi.2020.24.6.129 |
|
Keywords |
비선형 정적 해석; 지진파; 직접기초; 말뚝기초; 지진취약도 곡선 push-over test; seismic wave; shallow foundation; pile foundation; fragility curve |
|
Abstract |
In performing the structural analysis, the foundation is considered to be a fixed end as a plastic hinge model. In this study, the displacements of the foundation, pier, and shoe were compared when the foundation modeled as a fixed end, a shallow foundation constructed on bedrock of 2m depth, and a pile foundation constructed in the 10m to 20m depth of bedrock. The shear force was also compared, and the probability of damage was calculated and compared for the critical condition. When calculated as a fixed end, the displacement of the foundation converged to 0mm, but the shallow foundation built on the bedrock with a depth of 2m caused relatively displacement, and the pile foundation constructed to contact the bedrock with a depth of 18m caused a larger displacement. In addition, it was analyzed that the displacement of the foundation, which is the lower structure, affects the displacement of the super structure, but the difference in shear force applied to the foundation was insignificant in the three cases. There was no difference between the shallow foundation and the pile foundation in the influence on the displacement of the top of the pier, but there was a big difference from the analysis assuming as a fixed end.
|