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彪仿俊   王傳甲   薛  炳   王慶揚(yáng)
(中國電子工程設(shè)計(jì)院深圳電子院設(shè)計(jì)有限公司，深圳518031)

[摘要] 采用ABAQUS對(duì)空中華西村上部結(jié)構(gòu)和樁筏基礎(chǔ)進(jìn)行了整體三維彈塑性數(shù)值模擬。計(jì)算采用Mohr Coulomb模型和混凝土塑性損傷模型分別描述土和混凝土的非線性材料特性，采用Winkler模型描述樁的力學(xué)行為，在此基礎(chǔ)上模擬了沉降過程中上部結(jié)構(gòu)、筏板、樁以及土的共同作用過程。和以往的分析手段相比，該方法能夠模擬上部結(jié)構(gòu)剛度以及混凝土開裂損傷引起的沉降變化、筏板混凝土和鋼筋應(yīng)力的重分布及樁基反力分布的變化。該方法計(jì)算假定較少，為基礎(chǔ)設(shè)計(jì)和驗(yàn)算提供了比傳統(tǒng)方法更可靠的數(shù)值依據(jù)。
[關(guān)鍵詞] 樁筏基礎(chǔ)；塑性損傷；基底土反力；數(shù)值模擬；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