粘弹性消能支撑在网格屋盖结构上的应用研究
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摘要
根据网格屋盖结构的动力特性和构造特点,提出粘弹性阻尼器小八字消能支撑进行减震控制,并采用单质点模型推导出设置消能支撑后屋盖结构的阻尼比计算公式,进一步依据震动谱理论推导出单质点分析法预测屋盖消能结构减震系数的公式,对于消能结构的详细设计则采用振型分解反应谱法或时程分析法,最后结合工程实例进行了数值分析,结果表明:粘弹性阻尼器消能支撑可以有效降低网格屋盖结构由水平地震主导的反应,包括屋盖侧移、节点水平加速度、柱脚反力等。
The viscoelastic energy dissipative brace was applied to lattice roof-structure for seismic control in this paper.The equation to calculate the damping ratio of the structure and the equation to estimate the control effect were established successively according to single mass point model.And the mode decomposition response spectrum method or the time history analysis method was suggested for detailing design.Two specific projects were taken as examples for numerical analysis.The results indicated that the viscoelastic energy dissipative brace can evidently reduce the response induced mainly by horizontal earthquake excitations,including the roof deformation,the node horizontal acceleration and the reaction of column foot.
The viscoelastic energy dissipative brace was applied to lattice roof-structure for seismic control in this paper.The equation to calculate the damping ratio of the structure and the equation to estimate the control effect were established successively according to single mass point model.And the mode decomposition response spectrum method or the time history analysis method was suggested for detailing design.Two specific projects were taken as examples for numerical analysis.The results indicated that the viscoelastic energy dissipative brace can evidently reduce the response induced mainly by horizontal earthquake excitations,including the roof deformation,the node horizontal acceleration and the reaction of column foot.
引文
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[8]唐柏鉴,杨德健,李亚明.粘弹性阻尼器消能支撑极限承载力的复核[J].天津城建学院学报,2005,11(4):242―245.Tang Baijian,Yang Dejian,Li Yaming.Check of bearing capacity of viscoelastic dissipative brace[J].Journal of Tianjin City Construction College,2005,11(4):242―245.(in Chinese)
[9]唐柏鉴.大跨屋盖结构的抗震与减震研究[D].上海:同济大学,2006.Tang Baijian.Research on earthquake-resistance and energy dissipation of large-span roof structure[D].Shanghai:Tongji University,2006.(in Chinese)
[10]GB50011-2001,建筑抗震设计规范(2008版)[S].2008.GB50011-2001,Code for seismic design of building(2008)[S].2008.(in Chinese)
[11]唐柏鉴,宋雪峰,沈之容.吉斯达海门商务馆屋盖结构多维抗震设计研究[J].建筑结构,2007,37(2):27―30.Tang Baijian,Song Xuefeng,Shen Zhirong.Research on multi-dimensional seismic design of GSL roof structure[J].Building Structure,2007,37(2):27―30.(in Chinese)
[2]Mahmoodi P,Robertson L E.Performance of viscoelastic dampers in world trade center building[J].Building Motion in Wind,ASCE,1986,112(1):83―106.
[3]Zhang R H,Soong T T.Seismic design of viscoelastic dampers for structural applications[J].Journal of Structural Engineering,ASCE,1992,118:1375―1392.
[4]瞿伟廉.设置粘弹性阻尼器钢结构高层建筑抗震抗风设计的实用方法[J].建筑结构学报,1998,19(30):42―49.Qu Weilian.Practical method for seismic and wind design of steel high building installed viscoelastic damper[J].Journal of Building Structures,1998,19(30):42―49.(in Chinese)
[5]沈世钊.大跨空间结构理论研究和工程实践[J].苏州环保学院学报,2003,13(3):34―41.Shen Shizhao.Theory research and engineering application of large-span spatial structure[J].Journal of Suzhou Environmental Protection College,2003,13(3):34―41.(in Chinese)
[6]常业军.粘弹性阻尼器及消能减震结构的研究与应用[D].南京:东南大学,2003.Chang Yejun.Research and application of viscoelastic damper and dissipative structure[D].Nanjing:Dongnan University,2003.(in Chinese)
[7]欧进萍.结构被动耗能减振效果的参数影响[J].地震工程与工程振动,1998,18(1):60―70.Ou Jinping.Parameter analysis of passive dissipative structure[J].Earthquake Engineering and Engineering Vibration,1998,18(1):60―70.(in Chinese)
[8]唐柏鉴,杨德健,李亚明.粘弹性阻尼器消能支撑极限承载力的复核[J].天津城建学院学报,2005,11(4):242―245.Tang Baijian,Yang Dejian,Li Yaming.Check of bearing capacity of viscoelastic dissipative brace[J].Journal of Tianjin City Construction College,2005,11(4):242―245.(in Chinese)
[9]唐柏鉴.大跨屋盖结构的抗震与减震研究[D].上海:同济大学,2006.Tang Baijian.Research on earthquake-resistance and energy dissipation of large-span roof structure[D].Shanghai:Tongji University,2006.(in Chinese)
[10]GB50011-2001,建筑抗震设计规范(2008版)[S].2008.GB50011-2001,Code for seismic design of building(2008)[S].2008.(in Chinese)
[11]唐柏鉴,宋雪峰,沈之容.吉斯达海门商务馆屋盖结构多维抗震设计研究[J].建筑结构,2007,37(2):27―30.Tang Baijian,Song Xuefeng,Shen Zhirong.Research on multi-dimensional seismic design of GSL roof structure[J].Building Structure,2007,37(2):27―30.(in Chinese)
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