地震作用下城市立交抗震挡防撞措施分析
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摘要
为了明确地震作用下抗震挡前设置防撞装置对结构抗震性能的作用,通过非线性时程反应分析,应用接触单元对比了城市立交中抗震挡设置了防撞装置后的结构抗震性能。由有防撞装置单墩模型参数分析以及一联简支梁设置与不设置防撞装置模型的对比分析可知:防撞装置的最大容许变形量是防撞效果的重要控制参数,在抗震设计中应综合考虑结构碰撞刚度、防撞装置可以提供的变形量以及构造许可等因素。
In order to find out the structural seismic effects about fixing flexible device in front of the reinforced concrete block to decrease pounding,the seismic performances of the reinforced concrete block on anti-seism behavior with crashworthy device in urban interchange bridge under earthquake were explored by simulating pounding with nonlinear contact element during the nonlinear time-history analysis.By parameters analysis of single column model with crashworthy device and the contradistinctive analysis of simple supported bridge model with or without crashworthy device,the allowable maximum deformation of crashworthy device is the manipulative parameter for decreasing pounding effects which is obtained from the analytical results.Furthermore,impact stiffness,allowable maximum deformation of crashworthy device,limitation of construction should be taken into consideration during seismic design process.
In order to find out the structural seismic effects about fixing flexible device in front of the reinforced concrete block to decrease pounding,the seismic performances of the reinforced concrete block on anti-seism behavior with crashworthy device in urban interchange bridge under earthquake were explored by simulating pounding with nonlinear contact element during the nonlinear time-history analysis.By parameters analysis of single column model with crashworthy device and the contradistinctive analysis of simple supported bridge model with or without crashworthy device,the allowable maximum deformation of crashworthy device is the manipulative parameter for decreasing pounding effects which is obtained from the analytical results.Furthermore,impact stiffness,allowable maximum deformation of crashworthy device,limitation of construction should be taken into consideration during seismic design process.
引文
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[10]MALHOTRA P K.Dynamics of Seismic Pounding atExpansion Joints of Concrete Bridges[J].Journal ofEngineering Mechanics,1998,124(7):794-802.
[11]范立础,聂利英,李建中.地震作用下板式橡胶支座滑动的动力性能分析[J].中国公路学报,2003,16(4):30-35.FAN Li-chu,NIE Li-ying,LI Jian-zhong.DynamicCharacteristic Analysis of Laminated Rubber BearingSliding Under Earthquake[J].China Journal of High-way and Transport,2003,16(4):30-35.
[12]王军文,李建中,范立础.连续梁桥纵向地震碰撞反应参数研究[J].中国公路学报,2005,18(4):42-47.WANG Jun-wen,LI Jian-zhong,FAN Li-chu.Para-metric Study of Longitudinal Seismic Pounding Re-sponse for Continuous Girder Bridges[J].China Jour-nal of Highway and Transport,2005,18(4):42-47.
[13]李忠献,黄健,丁阳,等.不同地震激励下大跨度斜拉桥的地震反应分析[J].中国公路学报,2005,18(3):48-53.LI Zhong-xian,HUANG Jian,DING Yang,et al.Seis-mic Responses of Long-Span Cable-Stayed BridgesUnder Different Patterns of Earthquake Excitations[J].China Journal of Highway and Transport,2005,18(3):48-53.
[2]MALHOTRA P K,HUANG M J,SHAKAL A F.Seismic Interaction at Separation Joints of an Instru-mented Concrete Bridge[J].Earthquake Engineering&Structural Dynamics,1995,24(8):1 055-1 067.
[3]HALL J F.Northridge Earthquake of January 17,1994 Reconnaissance Report[J].Earthquake Spectra,1995,11(4):1-14.
[4]黄建文,朱.以位移为基础的钢筋混凝土连续梁桥抗震设计方法[J].中国公路学报,2005,18(2):28-33.HUANG Jian-wen,ZHU Xi.Displacement-BasedSeismic Design Method for RC Continuous GirderBridges[J].China Journal of Highway and Trans-port,2005,18(2):28-33.
[5]刘健新,胡兆同,李子青.桥梁结构减震设计方法研究[J].中国公路学报,2000,13(2):73-79.LIU Jian-xin,HU Zhao-tong,LI Zi-qing.DesignMethod for Seismic Absorption of Bridges Structures[J].China Journal of Highway and Transport,2000,13(2):73-79.
[6]范立础,胡世德,叶爱君.大跨度桥梁抗震设计[M].北京:人民交通出版社,2001.FAN Li-chu,HU Shi-de,YE Ai-jun.Long SpanBridge Seismic Design[M].Beijing:China Communi-cations Press,2001.
[7]MAISON B F,KAZUHIKO K.Dynamics of Poun-ding when Two Buildings Collide[J].Earthquake En-gineering and Structural Dynamics,1992,21(9):771-786.
[8]ANAGNOSTOPOULOS S A,SPILIOPOULOS K V.Investigation of Earthquake Induced Pounding Be-tween Adjacent Buildings[J].Earthquake Engineeringand Structural Dynamics,1992,21(4):289-302.
[9]ROBERT J,KRZYSZTOF W,YOZO F.Pounding ofSuperstructure Segments in Isolated Elevated BridgeDuring Earthquakes[J].Earthquake Engineering andStructural Dynamics,1998,27(5):487-502.
[10]MALHOTRA P K.Dynamics of Seismic Pounding atExpansion Joints of Concrete Bridges[J].Journal ofEngineering Mechanics,1998,124(7):794-802.
[11]范立础,聂利英,李建中.地震作用下板式橡胶支座滑动的动力性能分析[J].中国公路学报,2003,16(4):30-35.FAN Li-chu,NIE Li-ying,LI Jian-zhong.DynamicCharacteristic Analysis of Laminated Rubber BearingSliding Under Earthquake[J].China Journal of High-way and Transport,2003,16(4):30-35.
[12]王军文,李建中,范立础.连续梁桥纵向地震碰撞反应参数研究[J].中国公路学报,2005,18(4):42-47.WANG Jun-wen,LI Jian-zhong,FAN Li-chu.Para-metric Study of Longitudinal Seismic Pounding Re-sponse for Continuous Girder Bridges[J].China Jour-nal of Highway and Transport,2005,18(4):42-47.
[13]李忠献,黄健,丁阳,等.不同地震激励下大跨度斜拉桥的地震反应分析[J].中国公路学报,2005,18(3):48-53.LI Zhong-xian,HUANG Jian,DING Yang,et al.Seis-mic Responses of Long-Span Cable-Stayed BridgesUnder Different Patterns of Earthquake Excitations[J].China Journal of Highway and Transport,2005,18(3):48-53.
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