连体位置对连体结构位移响应影响的平稳随机振动分析
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摘要
基于高层连体结构受力特点与地震地面加速度在强震阶段的大致平稳性,采用串并联质点系层模型,运用虚拟激励法先求出单塔结构在各个楼层位置处的自谱值,再以连体毗邻楼层的自谱响应作为连接体多点完全相干的平稳随机激励,求出结构各楼层层间位移标准差及连体相对位移标准差,变换连体位置详细讨论了连体位置对结构动力特性、毗邻结构层间位移标准差及连体自身相对位移标准差的影响。研究结果表明:连体位置对结构刚度较弱的单塔的影响大于刚度较强单塔;连体的响应标准差随连体位置上升而逐渐加大;连体的响应标准差远大于楼层层间位移标准差。同时,分析了结果产生的原因,为高层连体结构的设计与分析方法提供参考。
Based on the mechanical characteristics of high-rise building connected structures and the stationary characteristics under the large earthquake,the layered model of serial and parallel mass point system in the connection structure was used,the auto-spectrum value of the monomers in connected position was found by using pseudo-excitation method first,and then displacement response was founded for the stationary random response by using the monomer's auto-spectrum response as the stationary random excitation completely multi-point coherent with the connector,the dynamic characteristics and displacement standard deviation response of the connectors under different connection position were discussed in detail.The results showed that the influence of connection position for the single weaker tower structural is greater than strong single tower,the connectors response standard deviation is gradually increased with the connectors position change and is much larger than inter-story displacement standard deviation of the towers,and the causes to the results were analyzed,which would provide some reference for the structure design and analysis method of high-rise connective structures.
Based on the mechanical characteristics of high-rise building connected structures and the stationary characteristics under the large earthquake,the layered model of serial and parallel mass point system in the connection structure was used,the auto-spectrum value of the monomers in connected position was found by using pseudo-excitation method first,and then displacement response was founded for the stationary random response by using the monomer's auto-spectrum response as the stationary random excitation completely multi-point coherent with the connector,the dynamic characteristics and displacement standard deviation response of the connectors under different connection position were discussed in detail.The results showed that the influence of connection position for the single weaker tower structural is greater than strong single tower,the connectors response standard deviation is gradually increased with the connectors position change and is much larger than inter-story displacement standard deviation of the towers,and the causes to the results were analyzed,which would provide some reference for the structure design and analysis method of high-rise connective structures.
引文
[1]黄坤耀,孙柄楠,楼文娟.连体刚度对双塔连体高层建筑地震相应的影响[J].建筑结构学报,2001,22(3):21-26HUANG Kunyao,SUN Bingnan,LOU Wenjuan.Influence of the connection stiffness on seismic response of the doubletower connected tall building[J].Journal of Building Structures,2001,22(3):21-26
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[8]M.Barbato,E.Tubaldi.A probabilistic performance-based approach for mitigating the seismic pounding risk between adjacent buildings[J].Earthquake Engng Struct.Dyn,2013,42:1203-1219
[9]杜永峰,李春锋.连体位置对单轴对称连体结构地震响应的影响[J].四川建筑科学研究.2009,35(1):157-160DU Yongfeng,LI Chunfeng.Influence of the connection position on seismic response of the unilateral symmetry connected buildings[J].Sichuan Building Science.2009,35(1):157-160
[10]李春锋,杜永峰等.双塔柔性连体结构地震响应等效试验电路设计与实现[J].特种结构,2010,27(1):40-44Li Chunfeng Du Yongfeng ShiJun,etc.The equivalent test circuit design and implementation of seismic response of a flexible double-tower connected structures[J].Special Structures,2010,27(1):40-44
[2]林家浩,张亚辉.随机振动的虚拟激励法[M].北京:科学出版社.2004年9月LIN Jiahao,ZHANG Yahui.Random vibration of pseudo excitation method[M].Beijing:Science Press,2004:270-277.(in Chinese)
[3]杜永峰,李春锋,邱玲.连接体刚度对连体位移响应影响的平稳随机振动分析[J].兰州理工大学学报,2008(6):125-130DU Yongfeng,LI Chunfeng,QIU Ling.Stationary random vibration analysis of influence of connected-body stiffness on its displacement response[J].Journal of Lanzhou University of Technology,2008,34(6):125-130.
[4]Clough R.W,Penzien J.Dynamic of Structures[M].2nd edition.New York,MeGraw-HilLInc,1993
[5]薛素铎,王雪生,曹资.基于新抗震规范的地震动随机模型参数研究[J].土木工程学报,2003,36(5):5-10XUE Suduo WANG Xuesheng,CAO Zi.Parameters study on seismic random model based on the new seismic code[J].China Civil Engineering Journal,2003,36(5):5-10.
[6]杜永峰,李春锋.连廊位置对高层连体结构地震响应的影响[J].工程抗震与加固改造,2008,30(3):60-63DU Yongfeng,LI Chunfeng.Influence of the connection position on seismic response of the connected high-building[J].Earthquake Resistant Engineering and Retrofitting,2008,30(3):60-63.
[7]Katafygiotis L,Cheung S H.Domain decomposition method for calculating the failure probability of linear dynamic systems subjected to Gaussian stochastic loads[J].Journal of Engineering Mechanics,2006,132(5):475-486.
[8]M.Barbato,E.Tubaldi.A probabilistic performance-based approach for mitigating the seismic pounding risk between adjacent buildings[J].Earthquake Engng Struct.Dyn,2013,42:1203-1219
[9]杜永峰,李春锋.连体位置对单轴对称连体结构地震响应的影响[J].四川建筑科学研究.2009,35(1):157-160DU Yongfeng,LI Chunfeng.Influence of the connection position on seismic response of the unilateral symmetry connected buildings[J].Sichuan Building Science.2009,35(1):157-160
[10]李春锋,杜永峰等.双塔柔性连体结构地震响应等效试验电路设计与实现[J].特种结构,2010,27(1):40-44Li Chunfeng Du Yongfeng ShiJun,etc.The equivalent test circuit design and implementation of seismic response of a flexible double-tower connected structures[J].Special Structures,2010,27(1):40-44
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