A study on seismic behavior of abutments considering soil structure interaction
JIAO Chiyu1,2, WU Runran3,4, LONG Peiheng1,3, LU Ziming5
1.Beijing Advanced Innovation Center for Future Urban Design,Beijing University of Givil Engineering and Architecture, Beijing 100044, China;
2.State Key Laboratory of Disaster Prevention in Civil Engineering, Tongji University, Shanghai 200092, China;
3.Engineering Structure and New Materials Research Center of Beijing Higher Education Institutions, Beijing University of Givil Engineering and Architecture,Beijing 100044, China;
4.Beijing Collaborative Innovation Center for Technology of Energy Saving and Emission Reduction, Beijing University of Givil Engineering and Architecture,Beijing 100044, China;
5.Beijing First Expressway Construction Management Co., Ltd., Beijing 100044, China
Abstract：This paper aims to study the structural response law of abutments during earthquake.Firstly, the seismic damage of abutments in previous earthquakes at home and abroad was analyzed.Secondly, taking the abutment of a G ramp curved girder bridge as the engineering background, the seismic response research of the abutment by solid element method were carried out, and the displacement time history in each unit of the abutment back wall from the bottom to the top during the earthquake was monitored.After that, three factors such as the abutment height, soil shear expansion angle, and the contact condition between soil and abutment which influence the abutment seismic response of abutment were studied.It can be concluded that: with the increase of abutment height, the amplification coefficient of maximum displacement of abutment back becomes larger; within the scope of this work, the shear expansion angle of soil has little effect on the seismic displacement response of abutment; when the separation effect of abutment and soil is considered, the seismic response at the top of abutment is larger than that obtained when the separation effect of abutment and soil is not considered.It is suggested that the contact state between soil and abutment should be accurately simulated in seismic design of abutment.The results can provide reference for the seismic response research of abutment structure.
焦驰宇1,2，吴闰然3,4，龙佩恒1,3，鲁子明5. 桩柱式桥台土-结构相互作用抗震性能研究[J]. 振动与冲击, 2021, 40(4): 235-242.
JIAO Chiyu1,2, WU Runran3,4, LONG Peiheng1,3, LU Ziming5. A study on seismic behavior of abutments considering soil structure interaction. JOURNAL OF VIBRATION AND SHOCK, 2021, 40(4): 235-242.
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