| 桩-土接触效应及对桥梁结构地震反应的影响 |
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| 引用本文： | 陈清军,姜文辉,李哲明.桩-土接触效应及对桥梁结构地震反应的影响[J].上海力学,2005,26(4):609-613. |
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| 作者姓名： | 陈清军 姜文辉 李哲明 |
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| 作者单位： | 同济大学土木工程防灾国家重点实验室,上海200092 |
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| 基金项目： | 国家自然科学基金（59895410;50538050） |
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| 摘 要： | 目前有关涉及桥梁桩基础地震反应的研究大多是基于桩与桩侧土体之间无相对滑动、位移保持协调的假定。本文针对地震作用下桥梁桩基础的接触面效应及其对结构地震反应的影响问题，以某桥梁工程为背景，通过在桩-土交界面处设置接触单元来模拟桩-土间的接触非线性，建立了土-桩-桥梁结构相互作用体系的三维分析模型。利用这一模型，分析了地震作用下桩-土交界面处的动力反应形态，探讨了桩-土间的接触非线性及其对桥梁结构地震反应的影响。初步分析结果表明：在强震作用下，桩-土间会产生较强的接触非线性，在本文模型中，这种非线性主要表现为桩-土交界面处的滑移；考虑桩-土间的接触面效应将使结构的位移反应结果较基于桩-土间位移协调的情形有所增大。
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| 关 键 词： | 桩-土接触非线性 桥梁结构 地震反应 相互作用 |
| 文章编号： | 0254-0053（2005）04-609-5 |
| 收稿时间： | 2005-04-30 |
| 修稿时间： | 2005年4月30日 |
Effect of Pile Soil Contact and Its Influence on Seismic Response of Bridge Structure |
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| CHEN Qing-jun, JIANG Wen-hui, LI Zhe-ming.Effect of Pile Soil Contact and Its Influence on Seismic Response of Bridge Structure[J].Chinese Quarterly Mechanics,2005,26(4):609-613. |
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| Authors: | CHEN Qing-jun JIANG Wen-hui LI Zhe-ming |
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| Institution: | State Key Laboratory for Disaster Reduction in Civil Engineering, Tongji University, Shanghai 200092, China |
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| Abstract: | The effect of pile soil contact and its influence on seismic response of bridge structure were investigated by the engineering background of an actual bridge. The 3D model of soil pile superstructure interaction system was established by using finite element method, and the interface element was used to model the interface behavior between soil and pile materials. The motion behavior at the interface of pile soil under seismic loading was analyzed, and its influence on the displacement response of pile footing and superstructure was also discussed. It is shown that the interface of pile soil would appear contact non-linearity under strong shock loading. |
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| Keywords: | interface non linearity of pile soil bridge structure seismic response interaction system |
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