结构隔震对远场地震动有较好的减震作用，但遭遇含长周期大脉冲的近断层地震动，隔震支座易产生较大水平位移，导致支座损坏甚至上部结构倾覆失稳，须对隔震支座进行软限位保护。对隔震层软限位的层间隔震结构振动台模型试验进行数值模拟，验证数值模拟精度；进而建立原型结构数值分析模型，进行了285种工况数值模拟计算，对非限位和限位工况下隔震层和主体结构的动力响应进行对比分析，结果表明，隔震层软限位可以限制隔震层变形，但对主体结构地震响应有增大影响；通过对限位设计参数优选，可将主体结构响应控制在不发生损伤或轻微损伤范围内；给出了软限位设计参数对层间隔震结构动力响应的影响规律，提出通过隔震限位结构损伤分析进行限位刚度优选的方法。
Abstract
Structural isolation has a better seismic reduction effect under far field earthquake.But under the action of near-fault ground motion with long-period and large pulses, isolation supports are easy to produce larger horizontal displacements causing support damage, and even upper structure’s overturning or losing stability.It is necessary to protect isolation supports using soft limit.Here, finite element software was used to simulate shaking table model tests of layered isolation structures with soft limit of seismic isolation layer to verify the accuracy of numerical simulation and establish the numerical analysis model of the original structure.Then, numerical simulation computations were performed under 285 operational conditions.The contrastive analysis was made for dynamic responses of isolation layer and the main body structure under limited and unlimited operational conditions.The results showed that the soft limit of isolation layer can restrict deformation of isolation layer, but it can make the seismic response of the main body structure increase; through optimizing design parameters of the limit, the response of the main body structure can be controlled within the range of no damage or slight damage; the influence law of soft limit’s design parameters on dynamic responses of layered isolation structures is derived, the method to optimize limit’s stiffness through damage analysis of layered isolation structures with soft limit is proposed.
关键词
近断层地震动 /
层间隔震 /
软限位 /
动力响应
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Key words
near-fault ground motion /
story isolation /
soft limit /
dynamic response
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参考文献
[1] 韩淼, 周锡元. 基础隔震建筑软碰撞保护分析[J]. 建筑科学, 1999, 15(1):14-20.
Han Miao, Zhou Xiyuan. Analysis of Soft Collision Safety for Base Isolated Buildings [J]. Building Science. 1999, 15(1): 14-20 .
[2] Heaton T H, Hall J F, Wald D J, et al. Response of high-rise and base-isolated buildings to a hypothetical mw 7.0 blind thrust earthquake.[J]. Science, 1995, 267(5195):206-11.
[3] 韩淼, 王秀梅. 基础隔震层软碰撞限位实验研究[J]. 工程抗震与加固改造, 2005.6, 27(3): 70-72+29.
Han Miao, Wang Xiumei. Experiment on Soft Collision Limiting Deformation of Base Isolated layer[J]. Earthquake Resistant Engineering and Retrofitting. 2005.6, 27(3): 70-72+29.
[4] 韩淼, 李仙华, 杜红凯. 基础隔震层钢螺旋弹簧软碰撞限位实验研究[J]. 世界地震工程, 2007.12, 23(4): 39-43.
Han Miao, Li Xianhua, Du Hongkai. Experiment on Limiting Displacement of Steel Spiral Spring Soft-collision for A Base Isolated layer[J]. World Earthquake Engineering. 2007.12, 23(4): 39-43.
[5] 樊剑, 刘铁, 魏俊杰. 近断层地震下摩擦型隔震结构与限位装置碰撞反应及防护研究[J]. 土木工程学报, 2007, 40(5):10-16.
Fan Jian, Liu Tie, Wei Junjie. Response and Protection of the Impact of Base-friction-isolated Structures and Displacement-constraint Devices under Near-fault Earthquakes. China Civil Engineering Journal. 2007, 40(05): 10-16.
[6] 赵桂峰, 马玉宏. 村镇建筑带限位装置摩擦隔震体系的参数影响研究[J]. 振动与冲击, 2011.6, 30(11):148-152.
Zhao Guifeng, Ma Yuhong. Parameters Study of Rural Buildings Structures Supported on Slide-limited Friction Base Isolation System[J]. Journal of Vibration and Shock. 2011.6, 30(11):148-152.
[7] 赵桂峰, 马玉宏, 张永山. 弹塑性缓冲限位与滞变-摩擦并联隔震体系参数分析[J]. 建筑结构学报, 2013.1, 34(1):131-138.
Zhao Guifeng, Ma Yuhong, Zhang Yongshan. Analysis on Parameters of Hysteretic-friction Isolated System with Elastic-plastic Displacement-constraint Device[J]. Journal of Building Structures. 2013.1, 34(1):131-138.
[8] 颜桂云, 项洪, 张铮, 陈盛富, 何梦超. 近场脉冲型强震下基础隔震结构的非线性反应与限位分析[J]. 建筑结构, 2016.6, 46(11):96-101.
Yan Guiyun, Xiang Hong, Zhang Zheng, Cheng Shengfu, He Mengchao. Nonlinear Responses of Base-isolated Structures and Limiting Deformation of Isolation Layers under Near-field Pulse-like Strong Ground Motionse[J]. Building Structures. 2016.6, 46(11):96-101.
[9] 韩淼, 孙欢, 段燕玲. 近断层地震作用下基础隔震层弹簧限位振动台试验研究[J]. 工程抗震与加固改造. 2013.10, 35(5): 127-131.
Han Miao, Huan Sun, Yanling Duan. Shaking Table Test Study on Spring Limiting Deformation to Base Isolation Layer under Near-field Ground Motion[J]. Earthquake Resistant Engineering and Retrofitting. 2013.10, 35(5): 127-131.
[10] 孙欢.近断层地震作用隔震层限位振动台实验研究[D].北京:北京建筑大学,2013.
Sun Huan. Shaking Table Test Study on Limiting Deformation to Base Isolation Layer under Near-field Ground Motion[D].Beijing: Beijing University of Civil Engineering and Architecture,2013.
[11] 段燕玲.隔震结构近断层地震响应振动台实验研究[D].北京:北京建筑大学,2013.
Duan Yanling. Shaking table test study on seismic responses of isolated structure under near-fault ground motions[D].Beijing: Beijing University of Civil Engineering and Architecture,2013.
[12] 韩淼, 崔明珠, 杜红凯. 近断层地震动下基础隔震弹簧限位对结构响应试验研究[J]. 振动与冲击. 2017.10, 2017.10, 36(19): 175-179.
Han Miao, Cui Mingzhu, Du Hongkai. Experimental Research on the Effect of Spring Displacement -constraint Devices on the Structural Responses of Base-isolated Structures under Near-fault Ground Motions[J]. Journal of Vibration and Shock. 2017.10, 2017.10, 36(19): 175-179.
[13]石亦平,周玉蓉. ABAQUS有限元分析实例详解[M].北京 机械工业出版社, 2012.
Shi Yiping, Zhou Yurong. ABAQUS Finite Element Analysis of Example Explanation [M]. Beijing: China Machine Press, 2012.
[14]GB50011-2010建筑抗震设计规范[S].北京：中国建筑工业出版社.2010.
GB50011-2010 Code for seismic design of buildin[S]. Beijing: China Architecture & Building Press. 2010.
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