可液化地基中单桩基础的三维数值分析方法及应用

王睿; 张建民

doi:10.11779/CJGE201511006

可液化地基中单桩基础的三维数值分析方法及应用 English Version

王睿,
张建民

1. 清华大学岩土工程研究所,北京 100084;
2. 清华大学水沙科学与水利水电工程国家重点实验室,北京 100084

基金项目: 国家自然科学基金项目（51038007,51079074）

详细信息

作者简介:
王睿(1987- ),男,博士,主要从事岩土工程抗震方面研究。E-mail: wangrui_05@mail.tsinghua.edu.cn。

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- 文章访问数: 342
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出版历程
- 收稿日期: 2014-09-07
- 发布日期: 2015-11-19

Three-dimensional elastic-plastic analysis method for piles in liquefiable ground

1. Institute of Geotechincal Engineering, Tsinghua University, Beijing 100084, China;
2. State Key Laboratory of Hydroscience and Engineering, Tsinghua University, Beijing 100084, China

摘要

摘要: 在砂土液化大变形物理机制的基础上,建立了三维的砂土液化大变形统一本构模型,该本构模型能够实现对不同状态砂土单调和循环加载以及液化前后力学行为的统一描述。利用这一本构模型,在OpenSees有限元平台上发展了针对可液化地基中桩基础震动的三维弹塑性有限元动力时程分析方法。在有限元分析中,土体采用u-p格式流体固体耦合立方体单元模拟,桩基础采用立方体实体单元模拟。利用本文建立的本构模型和相应分析方法,对水平可液化地基中单桩基础,以及发生侧向流动的倾斜地基中单桩基础的离心机振动台试验进行了三维有限元数值模拟。模拟结果验证了数值方法在模拟地基和桩基础震动响应方面的有效性。
- 液化地基 /
- 本构模型 /
- 单桩基础 /
- 离心机振动台试验 /
- 有限元数值模拟
Abstract: Based on the physics of large post-liquefaction deformation of sand, a three-dimensional unified plastic model for the large post-liquefaction deformation of sand is developed. The constitutive model is able to achieve unified description of the behaviour of sand at different states under monotonic and cyclic loadings during both pre- and post-liquefaction regimes. Using the model, a three-dimensional dynamic finite element analysis method for piles in liquefiable ground is established. In the finite element analysis, the soil is modelled through u-p form coupled brick elementss and the pile through brick elements. Centrifuge shaking table tests on a single pile in level liquefiable and lateral spreading grounds are simulated using the proposed finite element analysis method. The results exhibits the effectiveness of the proposed constitutive model and simulation methods in reproducing the dynamic response of both the ground and piles.
- liquefiable ground /
- constitutive model /
- single pile /
- centrifuge shaking table test /
- finite element simulation

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参考文献(20)

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