隔震桥梁横桥向挡块设计研究
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摘要
首先简要介绍了某隔震桥梁的隔震设计情况,分析了横桥向抗震挡块的设计思想和方法;然后选择一座两跨连续隔震桥梁建立了计算模型,并考虑梁体与挡块的非线性碰撞效应,利用多条地震波进行了桥梁基本烈度下的横桥向非线性时程分析。计算结果表明通过合理设置缓冲装置,本文所提设计方法可以保证挡块在基本烈度地震条件下处于完好状态。研究认为,挡块的碰撞刚度对桥梁的横向地震性能影响较大,但其取值缺乏必要的试验研究作为参考,有必要对桥梁挡块的力学性能进行碰撞试验研究,为碰撞刚度和屈服强度等参数的确定提供依据。
The isolation design of an isolation bridge is introduced briefly and the design process and thought for the seismic block are illustrated in this paper.A twospan continuous isolated bridge model was built,the nonlinear response history a nalyses were carried out to study the seismic performance of the blocks with eig ht seismic waves under design intensity seismic,considering the pounding effect between the girder and the blocks.The results show that the design method can keep the blocks in serviceable conditions under basic intensity with suitable da mping devices.The design process can be of reference to the seismic blocks desi gn.Additionally,the pounding stiffness of the the seismic blocks is valued sub jectively by the researchers,lacking of necessary model tests.It is necessary t o do some collision tests to research the mechanical properties of the seismic b locks,it's useful for getting the values of stiffness and yield stiffness of the the seismic blocks.
The isolation design of an isolation bridge is introduced briefly and the design process and thought for the seismic block are illustrated in this paper.A twospan continuous isolated bridge model was built,the nonlinear response history a nalyses were carried out to study the seismic performance of the blocks with eig ht seismic waves under design intensity seismic,considering the pounding effect between the girder and the blocks.The results show that the design method can keep the blocks in serviceable conditions under basic intensity with suitable da mping devices.The design process can be of reference to the seismic blocks desi gn.Additionally,the pounding stiffness of the the seismic blocks is valued sub jectively by the researchers,lacking of necessary model tests.It is necessary t o do some collision tests to research the mechanical properties of the seismic b locks,it's useful for getting the values of stiffness and yield stiffness of the the seismic blocks.
引文
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[3]JTG/T B02-01-2008,桥梁抗震设计细则[S].
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[5]KC Chang,K.Y Kuo,K Y Liu,and C.H Lu.OnSeismic Retrofit Strategies of Highway Bridges-Experi-ences Learned from Chi-chi Earthquake[C]∥13thWorld Conference on Earthquake Engineering,Van-couver,B.C.,Canada August 1-6,2004.Paper No.639.
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[8]朱文正,徐丽,孙卓.四川汶川穗威大桥引桥减震隔震设计[J],广州大学学报(自然科学版),2010,9(5):27-31.
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[10]邓育林,彭天波,李建中.地震作用下桥梁结构横向碰撞模型及参数分析[J],振动与冲击,2007,26(9):104-107.
[2]庄卫林,刘振宇,蒋劲松.汶川大地震公路桥梁震害分析及对策[J].岩石力学与工程学报,2009,28(7):1377-1387.
[3]JTG/T B02-01-2008,桥梁抗震设计细则[S].
[4]刘健新,赵国辉,李加武.汶川地震及中国公路桥梁抗震设计规范的变迁[J].交通科学与工程,2009,25(1):21-25.
[5]KC Chang,K.Y Kuo,K Y Liu,and C.H Lu.OnSeismic Retrofit Strategies of Highway Bridges-Experi-ences Learned from Chi-chi Earthquake[C]∥13thWorld Conference on Earthquake Engineering,Van-couver,B.C.,Canada August 1-6,2004.Paper No.639.
[6]Shervin Maleki.Effect of side retainers on seismic re-sponse of bridges with elastomeric bearings[J].Jour-nal of Bridge Engineering,2004,9(1):95-100.
[7]Shervin Maleki.Seismic modeling of skewed bridgeswith elastomeric bearings and side retainers[J].Jour-nal of Bridge Engineering,2005,10(4):442-449.
[8]朱文正,徐丽,孙卓.四川汶川穗威大桥引桥减震隔震设计[J],广州大学学报(自然科学版),2010,9(5):27-31.
[9]朱文正,刘健新.公路桥梁连梁装置研究[J],公路交通科技,2009,26(4):68-72.
[10]邓育林,彭天波,李建中.地震作用下桥梁结构横向碰撞模型及参数分析[J],振动与冲击,2007,26(9):104-107.
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