支座滑道半径对摩擦摆基础隔震结构地震反应的影响
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摘要
对摩擦摆基础隔震结构进行了地震反应分析,研究了支座滑道半径对支座位移、楼层加速度和楼层剪力的影响,表明当支座的摩擦系数较小时,随着支座滑道半径的增大,隔震结构的自振周期增大,摩擦摆支座位移逐渐增大,结构的加速度反应和楼层剪力减小;当支座的摩擦系数较大时,改变支座的滑道半径,调整基础隔震结构周期对支座位移、结构加速度反应和楼层剪力的影响较小。
The seismic responses of the base-isolated structure with friction pendulum system were analyzed.The influence of the radius of the spherical surface on the displacement of the bearing,the acceleration of the structure and the inter-story shear force were calculated.If the friction coefficient of the bearing is small,as the radius increases,the periods of the structure and the displacement of the bearing will increase,the acceleration of the structure and the shear force will decrease.If the friction coefficient is large,the influence of the radius of the spherical surface on the seismic responses of the structure becomes little.
The seismic responses of the base-isolated structure with friction pendulum system were analyzed.The influence of the radius of the spherical surface on the displacement of the bearing,the acceleration of the structure and the inter-story shear force were calculated.If the friction coefficient of the bearing is small,as the radius increases,the periods of the structure and the displacement of the bearing will increase,the acceleration of the structure and the shear force will decrease.If the friction coefficient is large,the influence of the radius of the spherical surface on the seismic responses of the structure becomes little.
引文
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[8]徐秀丽,段好安,郎冬梅,等.预应力混凝土大跨连续梁桥隔震设计[J].公路交通科技,2009,26(8):46-50.
[9]李洪立,刘昌鹏.苏通大桥引桥抗震设计[C]//中国公路学会桥梁和结构工程分会2006年全国桥梁学术会议论文集,2006:23-28.
[10]攸青言.摩擦摆基础隔震结构地震反应影响因素分析[D].郑州:郑州大学,2010.
[2]Constantinou MC,Roussis P C.Experimental and analytical studies of structures seismically isolated with an uplift restraining friction pendulumsystem[J].Earthquake Engineering and Structural Dynamics,2006,35:595-611.
[3]杨林,常永平,周锡元,等.FPS隔震体系振动台试验与有限元模型对比分析[J].建筑结构学报,2008,29(4):66-72.
[4]Mokha A S,Amin N,Constantinou MC,et al.Seismic isolation retrofit of large historic building[J].Journal of Structural Engineering,ASCE,1996,122(3):298-308.
[5]Dicleli M,Mansour MY.Seismic retrofitting of highway bridges in Illinois using friction pendulum seismic isolation bearings and modeling proce-dures[J].Engineering Structures,2003,25:1139-1156.
[6]Kim Y C,Xue S D,Zhuang P,et al.Seismic isolation analysis of FPS bearings in spatial lattice shell structures[J].Earthquake Engineering andEngineering Vibration,2010,9(1):93-102.
[7]焦驰宇,胡世德,管仲国.FPS抗震支座分析模型的比较研究[J].振动与冲击,2007,26(10):113-117.
[8]徐秀丽,段好安,郎冬梅,等.预应力混凝土大跨连续梁桥隔震设计[J].公路交通科技,2009,26(8):46-50.
[9]李洪立,刘昌鹏.苏通大桥引桥抗震设计[C]//中国公路学会桥梁和结构工程分会2006年全国桥梁学术会议论文集,2006:23-28.
[10]攸青言.摩擦摆基础隔震结构地震反应影响因素分析[D].郑州:郑州大学,2010.
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