基于ABAQUS的桩-土动力仿真分析

采用ABAQUS软件模拟桩土的动力作用和ABAQUS软件中的主一从接触算法。在桩与土体之间建立接触,以无限元模拟土体边界,对桩和锚索采用弹性模型,土体采用Drucker—Prager模型。通过计算,得到了在地震作用下桩的受力与变形情况,并对有锚索和无锚索两种情况下桩的受力与变形进行了分析比较。     

地震条件下双排抗滑桩受力分析

采用FLAC-3D软件模拟桩土的动力作用,抗滑桩、挡土板采用线弹性模型,土体采用Mohr-Coulomb弹塑性模型。对于桩土界面采用无厚度接触面interface单元进行模拟。通过计算,得到了在0.15,0.20,0.40g地震力作用下桩的受力与加速度分布情况。     

Dynamic Behavior of Double-Row Pre-stressed Anchor Piles under Earthquake Conditions

To investigate the seismic performance of the double-row pre-stressed anchor piles (DRPAPs) on the Yuxi-Mengzi railway, FLAC3D was used to construct a three-dimensional model. Using Koyna earthquake records as input motions, dynamic time-history analyses were carried out. In the analyses, we compared earth pressure on the front and back of the piles and deformation of the piles under different seismic forces with or without anchor cables. With the anchor cable present, the earth pressure on the back of the pile s free section increases, but that on the back of the pile s anchorage section decreases. Also, with anchor cables, the earth pressure on the front of the upper pile decreases, and that on the back of the lower pile decreases.