彪仿俊   王传甲   薛  炳   王庆扬
(中国电子工程设计院深圳电子院设计有限公司，深圳518031)

[摘要] 采用ABAQUS对空中华西村上部结构和桩筏基础进行了整体三维弹塑性数值模拟。计算采用Mohr Coulomb模型和混凝土塑性损伤模型分别描述土和混凝土的非线性材料特性，采用Winkler模型描述桩的力学行为，在此基础上模拟了沉降过程中上部结构、筏板、桩以及土的共同作用过程。和以往的分析手段相比，该方法能够模拟上部结构刚度以及混凝土开裂损伤引起的沉降变化、筏板混凝土和钢筋应力的重分布及桩基反力分布的变化。该方法计算假定较少，为基础设计和验算提供了比传统方法更可靠的数值依据。
[关键词] 桩筏基础；塑性损伤；基底土反力；数值模拟；沉降

Research of the Pile-raft Foundation Interaction of Konzhong Huaxicun
Biao Fangjun, Wang Chuanjia, Xue Bing, Wang Qingyang
( China Electronics Engineering Design Institute, Shenzhen Electronics Design Institute Co., Ltd., Shenzhen 518031,  China)

Abstract: Three dimensional numerical suuulation of the pile-raft foundation and the upper structure of Kongzhong Huaxicun is carried out. Mohr-Coulomb and concrete damage plasticity ruodel are used to describe the nonlinear properties of the soil and the concrete respectively. The settlement process is simulated with the whole model made up of the upper structure,  the pile-raft foundation and the soil below. The redistribution of the stress in the concrete and the rebar of the raft, the reaction force of the pile are analyzed under the influence of the upper structure. Compared to the traditional method, this method can provide more reliable bases for the foundation design.
Keywords: pile-raft foundation;  damage plasticity;  subsoil back pressure;  numerical simulation,  settleruent