Study on the effect of step series on seismic dynamic response of reinforced soil retaining wall
In order to optimize the structural design of reinforced earth retaining wall,the influence of step series on the seismic performance of reinforced earth retaining wall was studied.Based on Flac3D software,a numerical model of reinforced earth retaining wall was established,and the lateral displacement,vertical settlement,acceleration response and horizontal earth pressure of reinforced earth retaining walls with different step series under different peak ground acceleration(PGA)were discussed.The results show that under the peak acceleration of 4 m/s2,the lateral displacement decreases by 61.9%and the vertical settlement decreases by 20.5%with the increase of step series;The PGA amplification factor increases with the increase of the step number,and the PGA amplification factor in the stiffened area is slightly larger than that at the panel;The horizontal earth pressure of the one-stage retaining wall is maximum at the bottom,and the horizontal earth pressure of the two-stage and three-stage retaining walls reaches the maximum at the grading;The horizontal earth pressure is greater than the calculated value of the specification at the grading.Increasing the number of steps can improve the seismic performance of reinforced soil retaining wall.The research can provide theoretical reference for the classification design of reinforced soil retaining walls in practical engineering.
foundation engineeringreinforced soil retaining wallstep seriesnumerical simulationseismic performance
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