| 接触对桩-土-结构动力相互作用体系的影响 |
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| 引用本文： | 张亚旭,王修信,庄海洋.接触对桩-土-结构动力相互作用体系的影响[J].地震工程与工程振动,2009,29(6). |
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| 作者姓名： | 张亚旭 王修信 庄海洋 |
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| 作者单位： | 1. 东南大学,土木工程学院,江苏,南京,210096
2. 南京工业大学,岩土工程研究所,江苏,南京,210009 |
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| 基金项目： | 国家自然科学基金项目 |
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| 摘 要： | 为了考察桩-土接触效应对结构地震反应的影响,利用有限元软件ABAQUS建立了土-桩-框架二维有限元模型,分别采用损伤塑性模型和动力粘塑性记忆型嵌套面模型模拟混凝土和土体,利用rebar单元模拟混凝土内的钢筋,取得了较好的计算效果.计算分析中采用19条不同频谱的地震波记录,考虑了地震动强度、桩径、摩擦系数等因素,以层间位移角和桩顶最大位移为主要评价指标,揭示相互作用体系的动力响应特性.分析认为,计算结果对桩、土摩擦系数的取值不敏感;不考虑土-桩接触时,近场土体的动力反应与实际情况存在一定的误差,且上部结构和桩基的动力反应会被低估,应该考虑桩-土动力接触效应;地震动强度增加时,随着结构进入塑性状态,低估程度减小;桩径增加时,低估程度没有显著变化,虽然桩基和上部结构的反应都有所减小.
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| 关 键 词： | 桩-土-结构相互作用 动力接触 地震反应 二维有限元 |
Effect of contact behavior on responses of pile-soil-structure dynamic interaction systems |
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| ZHANG Yaxu,WANG Xiuxin,ZHUANG Haiyang.Effect of contact behavior on responses of pile-soil-structure dynamic interaction systems[J].Earthquake Engineering and Engineering Vibration,2009,29(6). |
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| Authors: | ZHANG Yaxu WANG Xiuxin ZHUANG Haiyang |
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| Institution: | ZHANG Yaxu1,WANG Xiuxin1,ZHUANG Haiyang2(1.Department of Civil Engineering,Southeast University,Nanjing 210096,China,2.Institute of Geotechnical Engineering,Nanjing University of Technology,Nanjing 210009,China) |
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| Abstract: | In order to evaluate the effect of contact on the earthquake responses of soil-structure interaction(SSI) systems,a 2D finite element model of SSI system was developed by using finite element method(FEM)software named ABAQUS.Damaged plastic model and dynamic visco-plastic memorial nested yield surface model are adopted to model concrete and soil respectively,and rebar element is used to simulate the steel in concrete.19 earthquake records with different frequency contents were used altogether.Influence fact... |
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| Keywords: | soil-pile-structure interaction(SSI) dynamic contact earthquake response 2D FEM |
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