RELIABILITY STUDY OF ANTI-SLIDE PILE WITH ANSYS AND RESPONSE SURFACE METHOD

This paper is based on the in-depth analysis of the geometric meaning of reliability index and the basic idea of response surface method. It proposes the algorithm steps of reliability index on the basis of ANSYS and response surface method. The engineering geological conditions of Dalugou loess landslide in Wuqi County Shaanxi Province are analyzed. According to the landslide geological survey data and design information of landslide remediation engineering, the finite element model of anti-slide pile soil system is established on ANSYS software platform. The numerical simulation results of pile and soil system under own weight condition prove the validity of the finite element model. Moreover, the density of landslide, the cohesion c, the internal friction angle of slide surface, and the compression modulus Es of sliding bed are screened as random variables. The reliability calculation model of anti-slide pile is developed using ANSYS software and CCD responding surface method. The corresponding algorithm is developed. The sample calculation shows that, when the number of test point N equals to 25,the probability of failure of anti-slide pile structure Pf=0.35% and =2.70,which verifies the feasibility of establishing the reliability model and corresponding algorithm with ANSYS and CCD response surface method.