| 可液化土-高层结构地震相互作用振动台试验 |
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| 引用本文： | 李培振,吕西林,任红梅,程磊. 可液化土-高层结构地震相互作用振动台试验[J]. 同济大学学报(自然科学版), 2010, 38(4): 467-474. DOI: 10.3969/j.issn.0253-374x.2010.04.001 |
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| 作者姓名： | 李培振 吕西林 任红梅 程磊 |
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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"九七三"重点基础研究发展计划资助项目，国家自然科学基金重大研究计划重点资助项目，国家自然科学基金资助项目，上海市青年科技启明星计划资助项目 |
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| 摘 要： | 进行了可液化土-高层结构地震相互作用的振动台试验,试验采用柔性容器以减小边界影响,采用饱和砂土作为模型土.试验中再现了液化场地土中高层结构的震害现象.得出的主要规律有:相互作用体系的振型曲线与刚性地基上结构的振型曲线明显不同;随着振动次数的增加,体系的频率降低,阻尼比增大;砂土对地震动可起滤波和隔震作用;当最初加速度峰值到达前,砂土层中的孔压比存在负值;震后土中孔隙水压力不一定随振动的停止而立即开始消散,在短期内可能继续增长;桩身应变幅值呈桩顶大、桩尖小的分布;桩土接触压力幅值分布规律与输入激励地震大小有关.
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| 关 键 词： | 地震相互作用 振动台试验 高层结构 可液化土 |
| 收稿时间： | 2008-12-29 |
| 修稿时间： | 2010-01-26 |
Shaking table testing on high-rise buildings considering liquefiable soil-structure interaction |
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| Li Peizhen,Lu Xilin,Ren Hongmei and Cheng Lei. Shaking table testing on high-rise buildings considering liquefiable soil-structure interaction[J]. Journal of Tongji University(Natural Science), 2010, 38(4): 467-474. DOI: 10.3969/j.issn.0253-374x.2010.04.001 |
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| Authors: | Li Peizhen Lu Xilin Ren Hongmei Cheng Lei |
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| Affiliation: | LI Peizhen,CHENG Lei,LU Xilin,REN Hongmei(State Key Laboratory of Disaster Reduction in Civil Engineering,Tongji University,Shanghai 200092,China) |
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| Abstract: | Shaking table model test was made on high-rise buildings with a consideration of the liquefiable soil-structure interaction with the saturated sand soil as model soil.A flexible container was fabricated to minimize the box effect.Macro-phenomena of high-rise building in ground of soil liquefaction due to natural earthquake were reproduced well.Test results show that the mode shape of the system is different from that of the structure on the fixed base in that there are rocking and swing at the foundation.Th... |
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| Keywords: | dynamic soil structure interaction shaking table test high-rise building liquefiable soil |
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