挡土墙后地震被动土压力的拟动力学分析

Analysis on Seismic Passive Earth Pressure behind Retaining Wall by Quasi-dynamics Method

考虑地震加速度的放大效应,运用拟动力学的研究方法,推导了地震条件下随时间变化的被动土压力系数、被动土压力合力、被动土压力强度和被动土压力合力作用点的理论公式;重点分析了加速度的放大系数以及地震卓越周期对最危险滑动面倾角、被动土压力系数以及被动土压力分布的影响。

Considering the amplification effect of seismic accelerations, the quasi-dynamics method is used to deduce the theoretical formulae of coefficient, resultant force, strength and resultant action point of the passive earth pressure with the time varying under the seismic condition. The emphasis of this paper is on analysis of the amplification coefficient of acceleration and the influence of seismic predominant period on the most dangerous sliding surface inclination, passive earth pressure coefficient and passive earth pressure distribution.