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FDM-DEM耦合分析刚性桩复合地基褥垫层特性
引用本文:郑俊杰,董友扣,马强,蒋明镜.FDM-DEM耦合分析刚性桩复合地基褥垫层特性[J].华中科技大学学报(自然科学版),2011(8):36-39.
作者姓名:郑俊杰  董友扣  马强  蒋明镜
作者单位:华中科技大学土木工程与力学学院;同济大学地下建筑与工程系;
基金项目:国家自然科学基金资助项目(50908112); 国家杰出青年基金资助项目(51025932)
摘    要:针对单独采用连续体法或离散元法分析桩体复合地基褥垫层的不足,以单桩模型试验为背景,采用有限差分法(FDM)模拟桩体和桩间土,采用离散单元法(DEM)模拟褥垫层,对刚性桩复合地基建立耦合计算模型,并对该模型各加载阶段的桩顶刺入量、褥垫层的受力特性和变形特性进行了分析.结果表明:当上部荷载较大时桩顶边缘出现沿竖向的滑裂带,褥垫层的调整均化作用是通过桩顶附近的颗粒从桩顶高应力区向低应力区流动实现的.

关 键 词:有限差分法  离散元法  耦合  复合地基  褥垫层  桩刺入  颗粒流

Analyzing the behaviours of rigid pile composite foundation through FDM-DEM coupling simulation
Zheng Junjie Dong Youkou Ma Qiang Jiang Mingjing.Analyzing the behaviours of rigid pile composite foundation through FDM-DEM coupling simulation[J].JOURNAL OF HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY.NATURE SCIENCE,2011(8):36-39.
Authors:Zheng Junjie Dong Youkou Ma Qiang Jiang Mingjing
Institution:Zheng Junjie1 Dong Youkou1 Ma Qiang1 Jiang Mingjing2(1 School of Civil Engineering and Mechanics,Huazhong University of Science and Technology,Wuhan 430074,China,2 Department of Geotechnical Engineering,Tongji University,Shanghai 200092,China)
Abstract:To improve continuum method or discrete element method (DEM) used in simulating the cushion of pile composite foundation,a coupling model was proposed.In this model,the piles and soil were simulated by finite difference method(FDM) while cushion by DEM,to simulate a single pile model experiment.The analysis of penetration value of pile and mechanical and deformation behavior of cushion at different phases in the coupling model show that there would be a vertical slip crack on the edge of pile when the load ...
Keywords:finite difference method(FDM)  discrete element method(DEM)  coupling  composite foundation  cushion  pile penetration  particle flow  
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