预应力厚层橡胶支座隔震性能研究
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摘要
针对现有隔震支座的不足,在普通叠层橡胶隔震支座(RB)的基础上,适当增大橡胶层厚度,结合预应力原理,提出一种新型的预应力厚层橡胶隔震支座(PRB)。在模型试验的基础上,建立其隔震结构非线性分析模型,推导了其水平刚度计算解析公式,编制相应的分析程序,分析和研究其工作原理及力学性能;通过时程反应分析,研究了其隔震性能。研究结果表明:PRB是水平变刚度支座,刚度大小与支座的水平位移等有关;它除具有RB的水平隔震性能外,还具有良好的水平限位等性能,地震强度越大,水平限位性能越好。
To overcome the shortage of existing rubber bearings(RB),a new type of isolator,prestressed rubber bearing(PRB),is presented in this paper,which was invented by amplifying appropriately the thickness of rubber layers in conventional laminated rubber isolator combining the prestressing principle.Based on the test results,the nonlinear analytical model of isolated structures was established.The analytical formula of PRB's horizontal stiffness was derived and the corresponding computational program was developed,the operating principle and mechanical properties of PRB was then studied.Through the time history analysis of isolated structures,the isolation capacity of PRBs was investigated.The results show that PRB is bearing with variable horizontal stiffness.It not only has horizontal isolation capacity as conventional RBs but also has favorable functions of horizontal displacement limitation(HDL),and the higher the seismic intensity is,the better the HDL property is.
To overcome the shortage of existing rubber bearings(RB),a new type of isolator,prestressed rubber bearing(PRB),is presented in this paper,which was invented by amplifying appropriately the thickness of rubber layers in conventional laminated rubber isolator combining the prestressing principle.Based on the test results,the nonlinear analytical model of isolated structures was established.The analytical formula of PRB's horizontal stiffness was derived and the corresponding computational program was developed,the operating principle and mechanical properties of PRB was then studied.Through the time history analysis of isolated structures,the isolation capacity of PRBs was investigated.The results show that PRB is bearing with variable horizontal stiffness.It not only has horizontal isolation capacity as conventional RBs but also has favorable functions of horizontal displacement limitation(HDL),and the higher the seismic intensity is,the better the HDL property is.
引文
[1]周福霖.工程结构减震控制[M].北京:地震出版社,1997:66-67.
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[3]Kang B S,Kang G J,Moon B Y.Hole and lead plugeffect on fiber reinforced elastomeric isolator for seismicisolation[J].Journal of Materials ProcessingTechnology,2003,140(1):592-597.
[4]Ismail M,Rodellar J,Ikhouane F.An innovativeisolation device for aseismic design[J].EngineeringStructures,2009,32(4):1168-1183.
[5]Kasalanati A,Constantinou M C.Testing and modelingof prestressed isolators[J].Journal of StructuralEngineering,ASCE,2005,131(6):857-866.
[6]彭天波,李建中,范立础.双曲面球型减隔震支座的竖向位移分析[J].同济大学学报:自然科学版,2009,35(9):1181-1185.(Peng Tianbo,Li Jianzhong,Fan Lichu.Analysis of vertical displacement of doublespherical aseismic bearing[J].Journal of TongjiUniversity:Natural Science,2009,35(9):1181-1185.(in Chinese))
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[9]张永山,颜学渊,王焕定,魏陆顺,赵桂峰.三维隔震抗倾覆支座力学性能试验研究[J].工程力学,2009,26(增刊1):124-126.(Zhang Yongshan,YanXueyuan,Wang Huanding,Wei Lushun,ZhaoGuifeng.Experimental study on mechanical propertiesof three-dimensional base isolation and overturnresistance device[J].Engineering Mechanics,2009,26(Suppl.1):124-126.(in Chinese))
[10]魏陆顺,周福霖,任珉,等.三维隔震(振)支座的工程应用与现场测试[J].地震工程与工程振动,2007,27(3):121-125.(Wei Lushun,Zhou Fulin,RenMin,et al.Application of three-dimensional seismicand vibration isolator to building and site test[J].Journal of Earthquake Engineering and EngineeringVibration,2007,27(3):121-125.(in Chinese))
[11]Lindley P B.Natural rubber structural bearings[C]//Joint Sealing and Bearing System for ConcreteStructures.Detroit:American Concrete Institute,1981:353-378.
[12]Gent A N.Eclectic stability of rubber compressionsprings[J].Journal of Mechanical EngineeringScience,1964,6(4):318-326.
[13]周锡元,马东辉,曾德民,等.隔震橡胶支座水平刚度系数的实用计算方法[J].建筑科学,1998,14(6):3-8.(Zhou Xiyuan,Ma Donghui,Zeng Demin,et al.A practical computation method for horizontalrigidity coefficient of seismic isolation rubber bearing[J].Building Science,1998,14(6):3-8.(inChinese))
[14]Chopra A K.结构动力学:理论及其在地震工程中的应用[M].谢礼立,吕大刚,译.北京:高等教育出版社,2005:124-136.(Chopra A K.Dynamics ofstructures:theory and applications to earthquakeengineering[M].Translated by Xie Lili,Lv Dagang.Beijing:Higher Education Press,2005:124-136.(inChinese))
[2]Iizuka M.A macroscopic model for prediction largedeformation behaviors of laminated rubber bearings[J].Engineering Structures,2000,22(4):323-334.
[3]Kang B S,Kang G J,Moon B Y.Hole and lead plugeffect on fiber reinforced elastomeric isolator for seismicisolation[J].Journal of Materials ProcessingTechnology,2003,140(1):592-597.
[4]Ismail M,Rodellar J,Ikhouane F.An innovativeisolation device for aseismic design[J].EngineeringStructures,2009,32(4):1168-1183.
[5]Kasalanati A,Constantinou M C.Testing and modelingof prestressed isolators[J].Journal of StructuralEngineering,ASCE,2005,131(6):857-866.
[6]彭天波,李建中,范立础.双曲面球型减隔震支座的竖向位移分析[J].同济大学学报:自然科学版,2009,35(9):1181-1185.(Peng Tianbo,Li Jianzhong,Fan Lichu.Analysis of vertical displacement of doublespherical aseismic bearing[J].Journal of TongjiUniversity:Natural Science,2009,35(9):1181-1185.(in Chinese))
[7]周锡元,韩淼,曾德民,樊水荣.具有软着陆保护的橡胶支座隔震体系[J].建筑结构学报,2000,21(5):2-10.(ZHOU Xiyuan,HAN Miao,ZENG Demin,FAN Shuirong.Rubber bearing isolation system withsoft landing protection[J].Journal of BuildingStructures,2000,21(5):2-10.(in Chinese))
[8]崔艺斌,张富有.带限位钢棒隔震橡胶垫基本特性研究[J].河海大学学报,2007,35(3):302-305.(Cui Yibin,Zhang Fuyou.Study on fundamentalcharacteristics of rubber insulation bearing with a steelbar inside[J].Journal of Hohai University,2007,35(3):302-305.(in Chinese))
[9]张永山,颜学渊,王焕定,魏陆顺,赵桂峰.三维隔震抗倾覆支座力学性能试验研究[J].工程力学,2009,26(增刊1):124-126.(Zhang Yongshan,YanXueyuan,Wang Huanding,Wei Lushun,ZhaoGuifeng.Experimental study on mechanical propertiesof three-dimensional base isolation and overturnresistance device[J].Engineering Mechanics,2009,26(Suppl.1):124-126.(in Chinese))
[10]魏陆顺,周福霖,任珉,等.三维隔震(振)支座的工程应用与现场测试[J].地震工程与工程振动,2007,27(3):121-125.(Wei Lushun,Zhou Fulin,RenMin,et al.Application of three-dimensional seismicand vibration isolator to building and site test[J].Journal of Earthquake Engineering and EngineeringVibration,2007,27(3):121-125.(in Chinese))
[11]Lindley P B.Natural rubber structural bearings[C]//Joint Sealing and Bearing System for ConcreteStructures.Detroit:American Concrete Institute,1981:353-378.
[12]Gent A N.Eclectic stability of rubber compressionsprings[J].Journal of Mechanical EngineeringScience,1964,6(4):318-326.
[13]周锡元,马东辉,曾德民,等.隔震橡胶支座水平刚度系数的实用计算方法[J].建筑科学,1998,14(6):3-8.(Zhou Xiyuan,Ma Donghui,Zeng Demin,et al.A practical computation method for horizontalrigidity coefficient of seismic isolation rubber bearing[J].Building Science,1998,14(6):3-8.(inChinese))
[14]Chopra A K.结构动力学:理论及其在地震工程中的应用[M].谢礼立,吕大刚,译.北京:高等教育出版社,2005:124-136.(Chopra A K.Dynamics ofstructures:theory and applications to earthquakeengineering[M].Translated by Xie Lili,Lv Dagang.Beijing:Higher Education Press,2005:124-136.(inChinese))
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