土-结构动力相互作用对基础隔震结构的影响
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摘要
基础隔震结构作为一种有效的被动控制方式,已经被广泛用于建筑结构、桥梁、核电站等工程领域中。现有规范在对其进行理论分析时通常沿用刚性地基假定,忽略土-结构相互作用(SSI);实际上结构物如果不考虑SSI会给其动力特性及地震反应的计算带来较大失真;因而有必要研究SSI对基础隔震结构的影响。视地基为均匀、各向同性的弹性半空间,采用弹簧-阻尼系统对其进行模拟;运用ANSYS有限元分析软件建立结构三维有限元模型,对不同场地类别下结构的动力特性进行了分析,研究了考虑SSI时结构的地震响应。结果表明,考虑SSI时结构的动力特性、地震响应均会受到不同程度的影响。
As an effective passive control method,base-isolation is widely used in the field of building structure,bridge and nuclear power plant.Existing code and theory of base-isolation don't consider the soil-structure interaction taking a fixed-base assuming,but this assuming will make dynamics and seismic response's calculation of structure not accurate,so it's necessary to do research on SSI's influence on base-isolation structure.In this analysis soil is seemed as a uniform isotropic elastic half space,it's represented by springs and dampers.3D model is set up by ANSYS.The dynamic characteristics and seismic response of the structure under different site soil are analyzed and studied.The research indicates that: SSI will influence structure's dynamic characteristics and seismic response.
As an effective passive control method,base-isolation is widely used in the field of building structure,bridge and nuclear power plant.Existing code and theory of base-isolation don't consider the soil-structure interaction taking a fixed-base assuming,but this assuming will make dynamics and seismic response's calculation of structure not accurate,so it's necessary to do research on SSI's influence on base-isolation structure.In this analysis soil is seemed as a uniform isotropic elastic half space,it's represented by springs and dampers.3D model is set up by ANSYS.The dynamic characteristics and seismic response of the structure under different site soil are analyzed and studied.The research indicates that: SSI will influence structure's dynamic characteristics and seismic response.
引文
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[8]张国栋.土与结构相互作用体系动力特性研究[J].岩土力学,2005,25(supp.2):397～400 Zhang Guo-dong.Research on Dynamic Characters of Soil-Structure Interaction System[J].Rock and Soil Mechanics,2005,25(supp.2):397～400(in Chinese)
[9]刘海卿,邵志姣.土-结构相互作用对铅芯橡胶支座隔震效果的影响[J].地震工程与工程振动,2010,30(3):161～165 Liu Hai-qing,Shao Zhi-jiao.Influence of Soil-StructureDynamic Interaction on Isolation Effect of Lead-Rubber Bearing[J].Journal of Earthquake Engeering and Engeering Vibration,,2010,30(3):161～165(in Chinese)(in Chinese)
[10]Alper Ucak,Panos Tspelas.Effect of Soil Structure Interaction on Seismic Isolated Bridges[J].Journal of Structural Engineering,2008,7(134):1154～1164
[11]武田寿一.建筑物隔震防震与控震[M].纪晓惠译.北京:中国建筑工业出版社,1997 Wutianshouyi.Building Isolation Antivibration and Vibration Control[M].Beijing:China Architecture and Building Press,1997(in Chinese)
[2]李海岭,葛修润.土-结构相互作用对基础隔震体系的影响[J].土木工程学报,2001,34(4):83～87Li Hai-ling,Ge Xiu-run.Effect of Soil-StructureInteraction on Base-Isolated Buildings System[J].China Civil Engeering Journal,2001,34(4):83～87(in Chinese)
[3]刘再华,丁强.地基基础隔震结构系统的动力响应[J].武汉城市建设学院学报,1995,12(2):44～51Liu Zai-hua,Ding Qiang.Earthquake Responses ofFoundation-Base-Isolated Structure System[J].Wuhan Urban Construction Institute,1995,12(2):44～51(in Chinese)
[4]张之颖,王洪卫,段学刚.地基-结构动力相互作用对基础隔震效果的影响[J].工业建筑,2007,37(10):54～57Zhang Zhi-ying,Wang Hong-wei,Duan Xue-gang.Influence of Soil and Structure Dynamic Interaction onBase Shake-Isolation Structure[J].IndustrialConstruction,2007,37(10):54～57(in Chinese)
[5]鲍华,徐礼华,徐书平.土-结构相互作用对基础隔震体系地震反应的影响[J].工业建筑,2005,35(8):75～81Bao Hua,Xu Li-hua,Xu Shu-ping.Influence of Soil-Structure Dynamic Interaction on Seismic Responses ofBase-Isolation[J].Industrial Construction,2005,35(8):75～81(in Chinese)
[6]李爱群.工程结构减震控制[M].北京:机械工业出版社,2007Li Ai-qun.Engineering Structure Vibration Control[M].Beijing:China Machine Press,2007(inChinese)
[7]李国豪.工程结构抗震动力学[M].上海:上海科学技术出版社,1980Li Guo-hao.Engineering Structure Seismic Dynamics[M].Shanghai:Shanghai Scientific and Technical Publishers,1980(in Chinese)
[8]张国栋.土与结构相互作用体系动力特性研究[J].岩土力学,2005,25(supp.2):397～400 Zhang Guo-dong.Research on Dynamic Characters of Soil-Structure Interaction System[J].Rock and Soil Mechanics,2005,25(supp.2):397～400(in Chinese)
[9]刘海卿,邵志姣.土-结构相互作用对铅芯橡胶支座隔震效果的影响[J].地震工程与工程振动,2010,30(3):161～165 Liu Hai-qing,Shao Zhi-jiao.Influence of Soil-StructureDynamic Interaction on Isolation Effect of Lead-Rubber Bearing[J].Journal of Earthquake Engeering and Engeering Vibration,,2010,30(3):161～165(in Chinese)(in Chinese)
[10]Alper Ucak,Panos Tspelas.Effect of Soil Structure Interaction on Seismic Isolated Bridges[J].Journal of Structural Engineering,2008,7(134):1154～1164
[11]武田寿一.建筑物隔震防震与控震[M].纪晓惠译.北京:中国建筑工业出版社,1997 Wutianshouyi.Building Isolation Antivibration and Vibration Control[M].Beijing:China Architecture and Building Press,1997(in Chinese)
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