大底盘多塔楼结构的隔震减震策略研究
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摘要
基于大底盘多塔楼的集中质量模型,考虑了基础隔震和层间隔震体系隔震机理的差异,推导了大底盘多塔楼层间隔震结构计算简化模型的运动方程,并对某实际工程进行了参数分析和计算仿真.结果表明:大底盘多塔楼层间隔震结构其隔震层参数对隔震效果影响显著,当隔震层刚度减小时,有利于上部结构剪力控制,但可能增加大平台层间剪力;增大隔震层阻尼对下部结构有较好的减震效果,而对于上部塔楼则存在阻尼最优值.针对大底盘多塔楼结构提出3种隔震减震策略,文章采用5条地震波对某实际工程结构进行了3个方案计算仿真分析,并比较了3种隔震方案的减震效果.
Based on lumped mass model of multi-tower structures with a large podium,this paper establishes the equation of motion of the newly isolated structure system.The parameter analysis of the isolation system is investigated and studied in detail.It is found that the isolation parameters of the isolated tower with a podium have a great influence on the control effectiveness.Results show that less stiffness of isolation layer will lead to a reduction in base shear of the platform while probably increasing shears of the isolated towers.With increasing damping level,the seismic responses of the podium remain decreasing.For the isolated tower,there is always an optimal damping level.Three isolation strategies for multi-tower structure with a large podium system are proposed herein,each of which is corresponding to a different design idea.A practical engineering structure is used as a numerical example,and three isolation strategies are simulated and compared systematically for a series of earthquake records.Some useful conclusions are obtained and will be helpful for future design of this complex structure system.
Based on lumped mass model of multi-tower structures with a large podium,this paper establishes the equation of motion of the newly isolated structure system.The parameter analysis of the isolation system is investigated and studied in detail.It is found that the isolation parameters of the isolated tower with a podium have a great influence on the control effectiveness.Results show that less stiffness of isolation layer will lead to a reduction in base shear of the platform while probably increasing shears of the isolated towers.With increasing damping level,the seismic responses of the podium remain decreasing.For the isolated tower,there is always an optimal damping level.Three isolation strategies for multi-tower structure with a large podium system are proposed herein,each of which is corresponding to a different design idea.A practical engineering structure is used as a numerical example,and three isolation strategies are simulated and compared systematically for a series of earthquake records.Some useful conclusions are obtained and will be helpful for future design of this complex structure system.
引文
[1]TANG Xing-rong.Structural design of special and complex building[M].Beijing:Machinery Industry Press,2006.(in Chi-nese)
[2]TAN Ping,ZHOU Fu-lin.Seismic isolation and response control of multi-tower structure on a large platform[J].Journal ofGuangzhou University:Natural Science Edition,2007,6(5):77-82.(in Chinese)
[3]WU Man-lin,TAN Ping,YE Mao.Reviewon structural vibration control methods in construction engineering[J].Journal ofWater Resources and Architectural Engineering,2009,7(4):19-26.(in Chinese)
[4]TAN Ping,Zhou Fu-lin.Research and application of seismic isolation system for civil engineering structures[J].Construc-tion Technology,2008,37(10):5-8.(in Chinese)
[5]FORNI M.Analysis of in-situ forced vibration tests of twin seismically isolated and non-isolated buildings[C]∥ASME,Pressure Vessels and Piping Division(Publication),1993,256:217-229.
[6]TAKEDA M.Study on seismic reliability of base isolated building comparing with non-base isolated building[C]∥Proceed-ings of ICOSSAR’89,The 5th International Conference on Structural Safety and Reliability(Part I),Published by ASCE,1989:747-750.
[7]ZOU Li-hua,ZHAO Ren-da.Analysis of the random responses to earthquake of the subsoil-base-interaction isolated system[J].Journal of Computational Mechanics,2005,22(2):252-256.(in Chinese)
[8]WANG Wei-gang.Elasto-plastic dynamic analysis of base-isolation structures[D].Hefei:Hefei Industry University,2005.(in Chinese)
[9]WU Tao,SHENG Hong-yu,TAO Ming-bai.The dynamic time-history analysis of inter-story-isolation structures[J].Engi-neering and Construction.2008,22(5):637-640.(in Chinese)
[10]ZHAO Xin,LI Jie.Finite element simulation of rubber bearing in story isolated structure[J].Building Structure,2001(11):66-68.(in Chinese)
[11]LI Xiang-zhen,OU Hai-long,LIN Shu.Simplified analysis on calculation model of interlayer seismic isolation[J].Earth-quake Engineering and Engineering Vibration,2002,22(1):121-122.(in Chinese)
[12]ZHOU Fu-lin,ZHANG Ying,TAN Ping.Theoretical study on story isolation system[J].China Civil Engineering Journal,2009,42(8):1-8.(in Chinese)
[1]唐兴荣.特殊和复杂高层建筑结构设计[M].北京:机械工业出版社,2006.
[2]谭平,周福霖.大平台多塔楼结构的隔震减震控制[J].广州大学学报:自然科学版,2007,6(5):77-82.
[3]吴曼林,谭平,叶茂.建筑工程中结构震动控制研究应用综述[J].水利与建筑工程学报,2009,7(4):19-26.
[4]谭平,周福霖.隔震技术的研究与工程应用[J].施工技术,2008,37(10):5-8.
[7]邹立华,赵人达.土-基础相互作用隔震体系地震随机响应分析[J].计算力学学报,2005,22(2):252-256.
[8]王伟刚.基础隔震结构弹塑性动力分析[D].合肥:合肥工业大学,2005.
[9]吴韬,盛宏玉,陶明白.层间隔震结构的动力时程分析[J].工程与建设,2008,22(5):637-640.
[10]赵昕,李杰.层间隔震结构隔震垫的有限元模拟[J].建筑结构,2001(11):66-68.
[11]李向真,欧海龙,林舒.层间隔震结构计算模型的简化分析[J].地震工程与工程振动,2002,22(1):121-122.
[12]周福霖,张颖,谭平.层间隔震体系的理论研究[J].土木工程学报,2009,42(8):1-8.
[2]TAN Ping,ZHOU Fu-lin.Seismic isolation and response control of multi-tower structure on a large platform[J].Journal ofGuangzhou University:Natural Science Edition,2007,6(5):77-82.(in Chinese)
[3]WU Man-lin,TAN Ping,YE Mao.Reviewon structural vibration control methods in construction engineering[J].Journal ofWater Resources and Architectural Engineering,2009,7(4):19-26.(in Chinese)
[4]TAN Ping,Zhou Fu-lin.Research and application of seismic isolation system for civil engineering structures[J].Construc-tion Technology,2008,37(10):5-8.(in Chinese)
[5]FORNI M.Analysis of in-situ forced vibration tests of twin seismically isolated and non-isolated buildings[C]∥ASME,Pressure Vessels and Piping Division(Publication),1993,256:217-229.
[6]TAKEDA M.Study on seismic reliability of base isolated building comparing with non-base isolated building[C]∥Proceed-ings of ICOSSAR’89,The 5th International Conference on Structural Safety and Reliability(Part I),Published by ASCE,1989:747-750.
[7]ZOU Li-hua,ZHAO Ren-da.Analysis of the random responses to earthquake of the subsoil-base-interaction isolated system[J].Journal of Computational Mechanics,2005,22(2):252-256.(in Chinese)
[8]WANG Wei-gang.Elasto-plastic dynamic analysis of base-isolation structures[D].Hefei:Hefei Industry University,2005.(in Chinese)
[9]WU Tao,SHENG Hong-yu,TAO Ming-bai.The dynamic time-history analysis of inter-story-isolation structures[J].Engi-neering and Construction.2008,22(5):637-640.(in Chinese)
[10]ZHAO Xin,LI Jie.Finite element simulation of rubber bearing in story isolated structure[J].Building Structure,2001(11):66-68.(in Chinese)
[11]LI Xiang-zhen,OU Hai-long,LIN Shu.Simplified analysis on calculation model of interlayer seismic isolation[J].Earth-quake Engineering and Engineering Vibration,2002,22(1):121-122.(in Chinese)
[12]ZHOU Fu-lin,ZHANG Ying,TAN Ping.Theoretical study on story isolation system[J].China Civil Engineering Journal,2009,42(8):1-8.(in Chinese)
[1]唐兴荣.特殊和复杂高层建筑结构设计[M].北京:机械工业出版社,2006.
[2]谭平,周福霖.大平台多塔楼结构的隔震减震控制[J].广州大学学报:自然科学版,2007,6(5):77-82.
[3]吴曼林,谭平,叶茂.建筑工程中结构震动控制研究应用综述[J].水利与建筑工程学报,2009,7(4):19-26.
[4]谭平,周福霖.隔震技术的研究与工程应用[J].施工技术,2008,37(10):5-8.
[7]邹立华,赵人达.土-基础相互作用隔震体系地震随机响应分析[J].计算力学学报,2005,22(2):252-256.
[8]王伟刚.基础隔震结构弹塑性动力分析[D].合肥:合肥工业大学,2005.
[9]吴韬,盛宏玉,陶明白.层间隔震结构的动力时程分析[J].工程与建设,2008,22(5):637-640.
[10]赵昕,李杰.层间隔震结构隔震垫的有限元模拟[J].建筑结构,2001(11):66-68.
[11]李向真,欧海龙,林舒.层间隔震结构计算模型的简化分析[J].地震工程与工程振动,2002,22(1):121-122.
[12]周福霖,张颖,谭平.层间隔震体系的理论研究[J].土木工程学报,2009,42(8):1-8.
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