【摘要】 采用离散元方法建立了某刚性重力式挡土墙的数值模型,并根据室内材料试验结果标定了数值模型的微观参数,使数值模拟结果建立在可靠的参数选择基础上。利用颗粒流软件的微观实时测量优势研究了地震荷载作用下挡土墙的失效模式。研究结果表明:加载初期,挡土墙在墙后动土压力、自身地震惯性力和基础摩擦力的作用下保持稳定;随着加速度峰值的增大,动土压力的波动偏离静土压力并逐渐增大,挡土墙发生水平滑移和旋转,当基础破坏后挡土墙还将发生竖向位移。更多还原

【Abstract】 In this paper,a numerical model of rigid gravity retaining wall was created by discrete element method,and microscopic parameters of the numerical model were adjusted according to indoor material test.The seismic failure mode of the rigid gravity retaining wall was studied use real-time measuring advantage of the software.The results show that retaining wall remain stable due to active earth pressure、seismic inertial force and frictional force at the early stage of loading.With the increase of peak acceleration,the horizontal active earth pressure increase gradually so that the retaining wall produced the horizontal displacement sliding along with rotation,and the retaining wall produced the vertical displacement after the foundation damaged.更多还原