考虑支座及限位装置非线性的接触摩擦单元模型
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摘要
在连续梁桥活动墩上设置限位装置后,活动墩处将包含活动支座的摩擦及限位装置的接触碰撞两种非线性,综合摩擦单元及接触单元的特性,分别考虑接触单元的弹性及弹塑性情况,提出了接触摩擦单元的有限元模型,给出了接触摩擦单元的滞回曲线,针对卸载曲线的不同状态,分别推导出了其卸载刚度;利用接触摩擦单元对设置有分散抗震挡块及活动摩擦支座的连续梁桥进行了非线性地震反应分析,对挡块在降低连续梁桥固定墩地震反应上的分散抗震作用进行了研究,该接触摩擦单元可用于设置有防落梁装置及活动支座桥梁的较为细致的抗震分析模型。
For continuous girder bridges,once the restrainer is installed at the movable pier,the seismic analysis model would be characterized by the friction nonlinearity at the movable support and conctact-and-collision nonlinearity of the restrainer.Based on the characteristics of the friction element and the contact element,finite contact-and-friction element models are presented,with the contact element being elastic and elasto-plastic,respectively.The hysteresis curve for the contact-and-friction element is given and the stiffness under unloading is derived according to various curves.The contact-and-friction element models were applied to the nonlinear time-history analysis of continuous girder bridges which contain friction-type movable supports and restrainers.The seismic dissipating effect of the restrainers on the seismic responses of the fixed pier is analyzed and it is shown that the contact-and-friction element can be used in the detailed aseismic model of continuous girder bridges which contain both restrainers and movable supports.
For continuous girder bridges,once the restrainer is installed at the movable pier,the seismic analysis model would be characterized by the friction nonlinearity at the movable support and conctact-and-collision nonlinearity of the restrainer.Based on the characteristics of the friction element and the contact element,finite contact-and-friction element models are presented,with the contact element being elastic and elasto-plastic,respectively.The hysteresis curve for the contact-and-friction element is given and the stiffness under unloading is derived according to various curves.The contact-and-friction element models were applied to the nonlinear time-history analysis of continuous girder bridges which contain friction-type movable supports and restrainers.The seismic dissipating effect of the restrainers on the seismic responses of the fixed pier is analyzed and it is shown that the contact-and-friction element can be used in the detailed aseismic model of continuous girder bridges which contain both restrainers and movable supports.
引文
[1]谢旭.桥梁结构地震响应分析与抗震设计[M].北京:人民交通出版社,2006.Xie xu.Seismic response and earthquake resistant designof bridges[M].Beijing:China Communications Press,2006.(in Chinese)
[2]日本铁道综合技术研究所.铁道构造物等设计标准及解说V抗震设计[S].2000.Japan Railway Technical Research Institute.Seismicdesign standards and explanations for railway structures[S].2000.(in Japanese)
[3]Kima J M,Fengb M Q,Shinozukac M.Energydissipating restrainers for highway bridges[J].SoilDynamics and Earthquake Engineering,2000,19:65―69.
[4]李忠献,岳福青,周莉.地震时桥梁碰撞分析的等效Kelvin撞击模型[J].工程力学,2008,25(4):128―133.Li Zhongxian,Yue Fuqing,Zhou Li.Equivalent Kelvinimpact model for pounding analysis of bridges duringearthquake[J].Engineering Mechanics,2008,25(4):128―133.(in Chinese)
[5]Sang-Hyo,Mha Ho-seong,Lee Sang-Woo.Effects ofbearing damage upon seismic behaviors of a multi-spangirder bridge[J].Engineering Structures,2006(28):1071―1080.
[6]Trochalakis Panos,Eberhard Marc O,Stanton John F.Design of seismic restrainers for in-span hinges[J].Structural Engineering,1997,123(4):469―478.
[7]Ping Zhu,Masato Abe,Yozo Fujino.Modelling threedimensional nonlinear seismic performance of elevatedbridges with emphasis on pounding of girders[J].Earthquake Engng Struct.Dyn.,2002,31:1891―1913.
[8]聂利英,李建中,范立础.地震作用下结构碰撞的模型参数及其影响分析[J].工程力学,2005,22(5):142―146.Nie Liying,Li Jianzhong,Fan Lichu.Selection ofpounding analysis parameters and its effects on structureunder earthquake[J].Engineering Mechanics,2005,22(5):142―146.(in Chinese)
[9]王军文,李建中,范立础.限位装置对连续梁桥地震反应的影响[J].铁道学报,2008,30(3):71―77.Wang Junwen,Li Jianzhong,Fan Lichu.Effects ofrestrainers on seismic responses of continuous beambridges[J].Journal of the China Railway Society,2008,30(3):71―77.(in Chinese)
[10]邓育林,彭凯,李建中.地震作用下横向碰撞对连续梁桥地震反应的影响[J].结构工程师,2007,23(2):64―68.Deng Yulin,Peng Kai,Li Jianzhong.Effect of poundingon seismic responses of continuous girder bridges undertransverse earthquake[J].Structural Engineers,2007,23(2):64―68.(in Chinese)
[11]Kim S H,Lee S W,Mha H S.Dynamic behaviors ofbridges considering pounding and friction effects underseismic excitations[J].Structural Engineering andMechanics,2000,10(6):621―633.
[12]艾庆华,王东升,李宏男,等.基于塑性铰模型的钢筋混凝土桥墩地震损伤评价[J].工程力学,2009,26(4):158―166.Ai Qinghua,Wang Dongsheng,Li Hongnan,et al.Seismic damage evaluation of RC bridge columns basedon plastic hinge model[J].Engineering Mechanics,2009,26(4):158―166.(in Chinese)
[2]日本铁道综合技术研究所.铁道构造物等设计标准及解说V抗震设计[S].2000.Japan Railway Technical Research Institute.Seismicdesign standards and explanations for railway structures[S].2000.(in Japanese)
[3]Kima J M,Fengb M Q,Shinozukac M.Energydissipating restrainers for highway bridges[J].SoilDynamics and Earthquake Engineering,2000,19:65―69.
[4]李忠献,岳福青,周莉.地震时桥梁碰撞分析的等效Kelvin撞击模型[J].工程力学,2008,25(4):128―133.Li Zhongxian,Yue Fuqing,Zhou Li.Equivalent Kelvinimpact model for pounding analysis of bridges duringearthquake[J].Engineering Mechanics,2008,25(4):128―133.(in Chinese)
[5]Sang-Hyo,Mha Ho-seong,Lee Sang-Woo.Effects ofbearing damage upon seismic behaviors of a multi-spangirder bridge[J].Engineering Structures,2006(28):1071―1080.
[6]Trochalakis Panos,Eberhard Marc O,Stanton John F.Design of seismic restrainers for in-span hinges[J].Structural Engineering,1997,123(4):469―478.
[7]Ping Zhu,Masato Abe,Yozo Fujino.Modelling threedimensional nonlinear seismic performance of elevatedbridges with emphasis on pounding of girders[J].Earthquake Engng Struct.Dyn.,2002,31:1891―1913.
[8]聂利英,李建中,范立础.地震作用下结构碰撞的模型参数及其影响分析[J].工程力学,2005,22(5):142―146.Nie Liying,Li Jianzhong,Fan Lichu.Selection ofpounding analysis parameters and its effects on structureunder earthquake[J].Engineering Mechanics,2005,22(5):142―146.(in Chinese)
[9]王军文,李建中,范立础.限位装置对连续梁桥地震反应的影响[J].铁道学报,2008,30(3):71―77.Wang Junwen,Li Jianzhong,Fan Lichu.Effects ofrestrainers on seismic responses of continuous beambridges[J].Journal of the China Railway Society,2008,30(3):71―77.(in Chinese)
[10]邓育林,彭凯,李建中.地震作用下横向碰撞对连续梁桥地震反应的影响[J].结构工程师,2007,23(2):64―68.Deng Yulin,Peng Kai,Li Jianzhong.Effect of poundingon seismic responses of continuous girder bridges undertransverse earthquake[J].Structural Engineers,2007,23(2):64―68.(in Chinese)
[11]Kim S H,Lee S W,Mha H S.Dynamic behaviors ofbridges considering pounding and friction effects underseismic excitations[J].Structural Engineering andMechanics,2000,10(6):621―633.
[12]艾庆华,王东升,李宏男,等.基于塑性铰模型的钢筋混凝土桥墩地震损伤评价[J].工程力学,2009,26(4):158―166.Ai Qinghua,Wang Dongsheng,Li Hongnan,et al.Seismic damage evaluation of RC bridge columns basedon plastic hinge model[J].Engineering Mechanics,2009,26(4):158―166.(in Chinese)
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