基于Abaqus的湿陷性黄土地区复合桩基承载性能分析

Bearing performance analysis on composite pile foundation in collapsible loess area based on Abaqus

湿陷性黄土在我国西部地区分布广泛,伴随着西部大开发战略的实施和重要基础设施的不断兴建,长短复合桩基在该地区得到广泛应用.用Abaqus分析一种长短复合桩基的承载性能.在桩基所承受的竖向载荷不变的情况下,逐步加大桩基所承受的横向载荷,得到承台的横向位移变化情况.分别改变桩长、桩径、桩距和桩-土弹性模量比等参数,进行多工况分析.最后给出Abaqus针对该问题的加速性能测试结果.

The collapsible loess area is widely distributed in the western region of China. The composite pile foundation has been widely applied in this region with the implementation of the western development strategy and the continuous construction of critical infrastructures. The bearing performance of a kind of composite pile is analyzed based on Abaqus. The transverse displacement values of the plate are obtained when the lateral load is gradually increased and the vertical load stays unchanged. The multi cases analysis is carried out with the individual change of the parameters such as length, diameter, spacing and pile soil elastic modulus ratio changed. Finally, the parallel acceleration performance test result of Abaqus for this problem is obtained.