| 近断层脉冲型地震动作用下高层摩擦摆基础隔震结构的减震性能研究 |
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| 引用本文： | 颜桂云,潘晨阳,薛潘荣,方艺文,潘钦锋.近断层脉冲型地震动作用下高层摩擦摆基础隔震结构的减震性能研究[J].世界地震工程,2019,35(3):045-55. |
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| 作者姓名： | 颜桂云 潘晨阳 薛潘荣 方艺文 潘钦锋 |
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| 作者单位： | 1. 闽台合作土木工程技术福建省高校工程研究中心, 福建工程学院 土木工程学院, 福建 福州 350118;2. 福州大学 土木工程学院, 福建 福州 350116 |
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| 摘 要： | 近断层地震动中长周期、短持时和高能量的加速度脉冲将对高层摩擦摆基础隔震结构的减震性能产生不利影响，考虑土-结构相互作用（SSI效应）后的隔震结构将产生动力耦合效应，可能进一步放大隔震结构地震响应。为此，通过一幢框架-核心筒高层摩擦摆基础隔震结构的非线性地震响应分析，考察近断层脉冲型地震动作用下框架-核心筒摩擦摆基础隔震结构的层间位移角、楼层加速度和隔震层变形等响应规律，揭示隔震体系的损伤机理。基于集总参数SR （sway-rocking）模型，分析不同场地类别与不同地震动类型对隔震体系动力响应影响规律。结果表明:高层摩擦摆基础隔震结构在近断层脉冲型地震动作用下的减震效果相比普通地震动减震效果变差，楼层剪力、层间位移角和隔震层变形等超越普通地震动作用下的1.5倍；对于Ⅲ和Ⅳ类场地类别，考虑SSI效应使隔震结构的地震响应进一步放大，弹塑性层间位移角随着土质变软增大尤为明显。
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| 关 键 词： | 近断层脉冲型地震动 高层结构 摩擦摆隔震 土-结构相互作用 减震性能 |
Seismic absorption performance of base-isolated high-rise structures using friction pendulums subjected to near-fault pulse ground motions |
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| YAN Guiyun,PAN Chenyang,XUE Panrong,FANG Yiwen,PAN Qinfeng,' target="_blank" rel="external">.Seismic absorption performance of base-isolated high-rise structures using friction pendulums subjected to near-fault pulse ground motions[J].World Information On Earthquake Engineering,2019,35(3):045-55. |
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| Authors: | YAN Guiyun PAN Chenyang XUE Panrong FANG Yiwen PAN Qinfeng " target="_blank">' target="_blank" rel="external"> |
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| Affiliation: | 1. Fujian-Taiwan Cooperative Institute of Civil Engineering Technology in Universities of Fujian Province, School of Civil Engineering, Fujian University of technology, Fuzhou 350118, China;2. School of Civil Engineering, Fuzhou University, Fuzhou 350116, China |
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| Abstract: | The adverse impacts on base-isolated high-rise structures using friction pendulums bearings will be exerted when subjected to near-fault ground motions featured by horizontal pulse motions of acceleration with long period, short duration and high energy, and the soil-structure interaction (SSI) which will result in a dynamic coupling effect, may further amplify the seismic response of an isolated structure. To this end, by nonlinear seismic response analysis of a frame-core tube base-isolated high-rise structure using friction pendulums, the impacts of near-fault pulse ground motions on the inter-story drift ratios, inter-story shear forces as well as deformation of isolation layer are revealed, and the damage mechanism of isolation system is examined. Further, based on sway-rocking model, the effects of different site types and different ground motion types on the dynamic response of isolation system are analyzed. The results show that the damping effects of the base-isolated high-rise structures using friction pendulums when subjected to near-fault pulse ground motions become worse than those when subjected to ordinary ground motions, the inter-story drift ratios, inter-story shear forces as well as deformation of isolation layer are 1.5 times greater than that of ordinary ground motions. On Ⅲ and Ⅳ sites, the nonlinear seismic response of isolated structures is enlarged by considering the SSI effect. The inter-story drift ratios increase obviously with the soil softening. |
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| Keywords: | near-fault pulse ground motion high-rise structure friction pendulum isolation soil-structure interaction shock absorption performance |
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