| 桩土接触数值模拟试验 |
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| 引用本文： | 甘立刚,李碧雄,吴体,周薇.桩土接触数值模拟试验[J].四川建筑科学研究,2009,35(2). |
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| 作者姓名： | 甘立刚 李碧雄 吴体 周薇 |
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| 作者单位： | 1. 四川大学建筑与环境学院,四川,成都,610065
2. 四川省建筑科学研究院,四川,成都,610081 |
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| 摘 要： | 用数值分析方法模拟桩土共同作用时自重荷载步的施加将使土体产生变形,而实际工程中,土体自重作用产生的变形早已完成,故两者之问存在一定差异.通过设置接触单元来模拟桩土之间的共同作用,并利用ANSYS中的荷载步来实现扣除土体自重应力引起的变形,对桩土进行3D有限元模拟.数值分析结果与现场实测值的比较表明,在桩土接触模拟中通过荷载步的方法考虑土体自重应力是可行的.还通过分析不同荷载步作用下桩土之间的相互挤压力分布和桩侧摩阻力分布,指出了桩端附近桩侧土体存在的"拱效应"显著减小了该处作用于桩侧的水平土压力和桩侧摩阻力.
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| 关 键 词： | 接触 荷载步 初始应力 桩侧摩阻力 桩土共同作用机理 |
Numerical simulation of the pile-soil interface |
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| GAN Ligang,LI Bixiong,WU Ti,ZHOU Wei.Numerical simulation of the pile-soil interface[J].Building Science Research of Sichuan,2009,35(2). |
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| Authors: | GAN Ligang LI Bixiong WU Ti ZHOU Wei |
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| Affiliation: | 1.College of Architecture and Environment;Sichuan University;Chengdu 610065;China;2.Sichuan Institute of Building Research;Chengdu 610081;China |
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| Abstract: | The deformation of soil will be caused by deadweight step in simulating the pile-soil cooperation by numerical simulation method,while the deformation of soil by the gravity effect has already been finished in the actual project,so there is difference.In this paper,the contact element is used to simulate the pile-soil cooperation,and 3D finite element method is also used by subtracting the distortion of the soil for the deadweight by load step in ANSYS.Compared with the meterage results,the numerical simula... |
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| Keywords: | contact load step initial stress pile lateral friction resistance the mechanism of pile-soil cooperation |
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