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.
Key words
curved bridge /
soil-abutment interaction /
ABAQUS software /
numerical simulation /
seismic performance
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