基于Ansys的滑坡抗滑桩动力特性的有限元分析

Finite element analysis of dynamic characteristics of anti-slide pile based on Ansys

采用Ansys有限元计算软件,以某滑坡体为例,建立了有限元的三维模型,并选取Kobe地震波中的代表性波段,研究了在地震作用下抗滑桩的侧面应力、动土压力以及桩身的弯矩分布规律。结果表明:在地震作用下,抗滑桩侧面受到不可忽略的侧面应力,对其抗震能力产生有利影响;地震时,抗滑桩产生的弯矩呈现"凸"形,在滑坡带部位达到最大;同时还出现负弯矩,对抗滑桩的抗震不利,在设计时应加以考虑。

The finite element calculation software Ansys was used to develop a three-dimensional model of a landslide. The representative range of Kobe earthquake wave was selected to investigate the distribution characteristics of lateral stress, soil pressure, and bending moment of the anti-slide pile. The results showed that the lateral stress of the anti-slide pile is significant under earthquakes, which may have a favorable impact on the anti-seismic performance of the pile; the bending moment of the anti-slide pile shows in the “convex” shape and it reaches the maximum in the landslide area during the earthquake; and the occurrence of negative moment can have an adverse impact on the anti-seismic performance of the pile.