强震边坡动力响应及安全系数计算

Dynamic Response and Safety Coefficient Calculation of Slope under Severe Earthquake

运用ANSYS大型通用软件,对一均质边坡进行地震荷载模拟分析;根据Wilson-θ时程分析方法,将天津地震波输入到边坡模型上,对该边坡进行了应力、位移、速度和加速度动力响应分析。并由摩尔-库伦强度理论对ANSYS通用后处理器进行编程,得出边坡的安全系数分布云图。当安全系数为0.521时,全图的部分穿越临空边界,有滑移的可能,得出该模型不稳定,安全系数为0.521。

A seismic analysis of a uniform slope was made through ANSYS.According to the Wilson-θ time history analysis and dynamic response analysis of stress,displacement,velocity and acceleration were done under the Tianjin seismic which was input into the slope model.In the POST1,safety factor was calculated through stress field by Moore-coulomb＇s Strength Theory;safety coefficient distribution map was obtained.When safety factor was 0.521,a section crossed volley border,therefore it had the possibility of sliding.It was demonstrated that the model with safety coefficient 0.521 was unstable.