A 12-story reinforcement concrete frame structure is employed to simulate the superstructure.
The finite difference method FLAC3D is used in the analysis. Numerical simulation using the dynamic analysis module of the finite difference software,FLAC3D,was conducted for a full-scale gabion-reinforced soil retaining wall subjected to horizontal seismic wave.The numerical model was validated by comparison between the numerical and the measured seismic experimental results.The dynamical responses of the retaining wall,such as horizontal and vertical displacement,acceleration and failure mode,were analyzed when the wall was subjected to seismic waves with different amplitudes and was reinforced with different vertical spacing reinforcements.On the basis of the above analysis,some measures and suggestions were proposed for the seismic design of gabion-reinforced soil retaining wall.The results show that no collapse occurs when the wall is excited by seismic wave with different peak value accelerations.The wall can continue to bear load even though large seismic-induced horizontal displacement and settlement have appeared.Therefore,the gabion-reinforced soil retaining wall may have good seismic performance.The acceleration amplification factor trends decrease with increase of the peak value acceleration when the frequency characteristics of input seismic time-history is almost unchanged.The vertical spacing of the gabion mesh reinforcement should not exceed 1.0m,0.75m,0.5m,when the wall is constructed in seismic regions of earthquake intensity less than 7 degree,equal to 8 degree,no less than 9 degree,respectively.The potential sliding surface is bilinear when the wall is under horizontal seismic wave.The seismic-induced displacement control standard is suggested for gabion-reinforced soil retaining walls. A three-dimensional numerical analysis of shaking table tests on dynamic soil-pile-superstructure interaction (SSI) system considering soil liquefaction is presented in this paper.
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