半柔性悬挂减振结构振动台试验研究
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摘要
通过对设置黏滞流体阻尼器的半柔性悬挂结构进行地震模拟振动台试验,分析了主结构与悬挂楼面的质量比、连接方式、阻尼器的分布和层间斜撑对悬挂结构动力特性和响应的影响。试验结果表明:采用阻尼器连接主结构和悬挂楼面,可改变结构频率和振型阻尼比;当悬挂楼层侧向刚度较小时,结构振型表现为柔性层与悬挂楼面的耦合剪切变形;当增设斜撑后,结构第一振型为柔性层的层间变形;阻尼器连接时模型的主结构地震响应小于刚性连接的普通悬挂结构,通过增设斜撑可进一步提高减振效果;与自由悬挂结构相比,采用阻尼器连接的悬挂减振结构能够较好地抑制悬挂楼面相对于主结构的位移和悬挂楼面的层间位移;设置斜撑后,能够进一步减小悬挂楼面的层间位移,同时弱化了阻尼器不均匀对减振效果的影响。
A Shaking table experiment of a semi-flexible suspended-floor structure(SFSS) equipped with fluid viscous dampers had been conducted.The effects of link types and mass ratios between the primary structure and suspended floors,distribution patterns of dampers and diagonal braces on the dynamic characteristics and responses of suspended-floor structures were verified.Test results showed that the frequencies and mode damping ratios of the SFSS installed with dampers were adjusted and its first three modes were mainly governed by the coupling shear drift of suspended floors and the flexible layer when the shear stiffness of suspended floors was relatively small.After diagonal braces were installed,the first mode was governed by the story drift of the flexible layer.The maximum top floor displacement of the SFSS with dampers was smaller than traditional suspended-floor structure and installing diagonal braces can improve the vibration-controlling effect.Moreover,the SFSS with the dampers can effectively decrease the displacements of suspended floors relative to the primary structure and the story drifts of suspended floors in comparison with the suspended-floor structures without links.Besides,the story drifts of suspended floors and the influence of the uniform distribution of dampers on the controlling responses can be decreased when diagonal braces were installed.
A Shaking table experiment of a semi-flexible suspended-floor structure(SFSS) equipped with fluid viscous dampers had been conducted.The effects of link types and mass ratios between the primary structure and suspended floors,distribution patterns of dampers and diagonal braces on the dynamic characteristics and responses of suspended-floor structures were verified.Test results showed that the frequencies and mode damping ratios of the SFSS installed with dampers were adjusted and its first three modes were mainly governed by the coupling shear drift of suspended floors and the flexible layer when the shear stiffness of suspended floors was relatively small.After diagonal braces were installed,the first mode was governed by the story drift of the flexible layer.The maximum top floor displacement of the SFSS with dampers was smaller than traditional suspended-floor structure and installing diagonal braces can improve the vibration-controlling effect.Moreover,the SFSS with the dampers can effectively decrease the displacements of suspended floors relative to the primary structure and the story drifts of suspended floors in comparison with the suspended-floor structures without links.Besides,the story drifts of suspended floors and the influence of the uniform distribution of dampers on the controlling responses can be decreased when diagonal braces were installed.
引文
[1]Smith B S,Coull A.Tall building structures:analysis anddesign[M].New York:John Wiley&Sons,1991
[2]王肇民,邓洪洲,董军.高层巨型框架悬挂结构体系抗震性能研究[J].建筑结构学报,1999,20(1):23-30(Wang Zhaomin,Deng Hongzhou,Dong Jun.A study ofaseismic properties of huge frame suspended structure intall buildings[J].Journal of Building Structures,1999,20(1):23-30(in Chinese))
[3]Zhang Y H,Liang Q Z.Asynchronous driving principleand its application to vibration control[J].EarthquakeEngineering&Structural Dynamics,2000,29(2):259-270
[4]邓志恒,秦荣.巨型框筒部分悬挂结构控制体系地震反应特性及阻尼控制研究[J].地震工程与工程振动,2002,22(4):133-138(Deng Zhiheng,Qin Rong.Studyon characteristics of seismic response and damping controlfor mega-frame tube with partial suspension systems[J].Earthquake Engineering and Engineering Vibration,2002,22(4):133-138(in Chinese))
[5]曹万林,卢智成,张建伟,等.核心筒部分悬挂结构振动台试验及分析[J].土木工程学报,2007,40(3):40-44,82(Cao Wanlin,Lu Zhicheng,Zhang Jianwei,et al.Shaking table test and analysis of core-tube partialsuspension structures[J].China Civil EngineeringJournal,2007,40(3):40-44,82(in Chinese))
[6]Wang C L,Lu Z T,Tu Y M.Dynamic responses of core-tubes with semi-flexible suspension systems linked byviscoelastic dampers under earthquake excitation[J].Advances in Structural Engineering,2011,14(5):801-814
[7]王春林,吕志涛,吴京.半柔性悬挂结构体系的减振机理及其减振效果分析[J].土木工程学报,2008,41(1):48-54(Wang Chunlin,Lu Zhitao,Wu Jing.Analysisof the mechanism and efficiency of vibration-absorption forsemi-flexible suspension systems[J].China CivilEngineering Journal,2008,41(1):48-54(in Chinese))
[8]王春林,吕志涛,吴京.半柔性悬挂减振结构体系地震反应分析[J].建筑结构学报,2008,29(6):107-112(Wang Chunlin,Lu Zhitao,Wu Jing.Seismic response ofsemi-flexible suspension vibration-absorption structures[J].Journal of Building Structures,2008,29(6):107-112(in Chinese))
[9]王春林,吕志涛,涂永明.半柔性悬挂结构体系的风振响应参数优化及阻尼控制[J].土木工程学报,2009,42(3):1-7(Wang Chunlin,Lu Zhitao,Tu Yongming.Damping control and parameter optimization of wind-induced responses of semi-flexible suspension systems[J].China Civil Engineering Journal,2009,42(3):1-7(in Chinese))
[2]王肇民,邓洪洲,董军.高层巨型框架悬挂结构体系抗震性能研究[J].建筑结构学报,1999,20(1):23-30(Wang Zhaomin,Deng Hongzhou,Dong Jun.A study ofaseismic properties of huge frame suspended structure intall buildings[J].Journal of Building Structures,1999,20(1):23-30(in Chinese))
[3]Zhang Y H,Liang Q Z.Asynchronous driving principleand its application to vibration control[J].EarthquakeEngineering&Structural Dynamics,2000,29(2):259-270
[4]邓志恒,秦荣.巨型框筒部分悬挂结构控制体系地震反应特性及阻尼控制研究[J].地震工程与工程振动,2002,22(4):133-138(Deng Zhiheng,Qin Rong.Studyon characteristics of seismic response and damping controlfor mega-frame tube with partial suspension systems[J].Earthquake Engineering and Engineering Vibration,2002,22(4):133-138(in Chinese))
[5]曹万林,卢智成,张建伟,等.核心筒部分悬挂结构振动台试验及分析[J].土木工程学报,2007,40(3):40-44,82(Cao Wanlin,Lu Zhicheng,Zhang Jianwei,et al.Shaking table test and analysis of core-tube partialsuspension structures[J].China Civil EngineeringJournal,2007,40(3):40-44,82(in Chinese))
[6]Wang C L,Lu Z T,Tu Y M.Dynamic responses of core-tubes with semi-flexible suspension systems linked byviscoelastic dampers under earthquake excitation[J].Advances in Structural Engineering,2011,14(5):801-814
[7]王春林,吕志涛,吴京.半柔性悬挂结构体系的减振机理及其减振效果分析[J].土木工程学报,2008,41(1):48-54(Wang Chunlin,Lu Zhitao,Wu Jing.Analysisof the mechanism and efficiency of vibration-absorption forsemi-flexible suspension systems[J].China CivilEngineering Journal,2008,41(1):48-54(in Chinese))
[8]王春林,吕志涛,吴京.半柔性悬挂减振结构体系地震反应分析[J].建筑结构学报,2008,29(6):107-112(Wang Chunlin,Lu Zhitao,Wu Jing.Seismic response ofsemi-flexible suspension vibration-absorption structures[J].Journal of Building Structures,2008,29(6):107-112(in Chinese))
[9]王春林,吕志涛,涂永明.半柔性悬挂结构体系的风振响应参数优化及阻尼控制[J].土木工程学报,2009,42(3):1-7(Wang Chunlin,Lu Zhitao,Tu Yongming.Damping control and parameter optimization of wind-induced responses of semi-flexible suspension systems[J].China Civil Engineering Journal,2009,42(3):1-7(in Chinese))
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