曲线桥在地震作用下的面内转动机理分析
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摘要
曲线桥梁在水平地震作用下,上部结构在两个主方向上的地震反应会产生耦合现象,该现象主要为梁端的横向位移和桥面板的面内转动;通过对简化的单跨曲线桥模型进行弹性时程分析,研究曲线桥在弦线方向的地震输入下的转动机理,并比较不同曲率半径下曲线桥的地震反应;讨论主梁-桥台相互作用对桥面板转动的影响,应用非线性时程分析计算不同曲率的曲线桥在不同地震输入角度下的地震反应,并确定最不利地震输入角度。
Seismic response of superstructure would appear coupling phenomenon in curve bridge.This phenomenon mainly includes transverse displacement and in-plane rotation.The rotation mechanism of earthquake action in chord direction is researched.Based on the analysis on the simplified single-span curve bridge and linear time-history,the in-plane rotation mechanism of curve bridge is studied,and different seismic responses with different curvature ratio are compared.The effect of the girder-abutment interaction on the in-plane rotation is discussed.Nonlinear time-history method is applied to calculate the seismic response with different curvature and different input direction.Finally,the most adverse input angle of earthquake is determined.
Seismic response of superstructure would appear coupling phenomenon in curve bridge.This phenomenon mainly includes transverse displacement and in-plane rotation.The rotation mechanism of earthquake action in chord direction is researched.Based on the analysis on the simplified single-span curve bridge and linear time-history,the in-plane rotation mechanism of curve bridge is studied,and different seismic responses with different curvature ratio are compared.The effect of the girder-abutment interaction on the in-plane rotation is discussed.Nonlinear time-history method is applied to calculate the seismic response with different curvature and different input direction.Finally,the most adverse input angle of earthquake is determined.
引文
[1]Burdette N J,Elnashai A S.Effect of asynchronous earthquakemotion on complex bridge 1:Methodology and input motion[J].Journal of Bridge Engineering,2008,13(2):158-165.
[2]Burdette N J,Elnashai A S.Effect of asynchronous earthquakemotion on complex bridge 2:Results and implications on assess-ment[J].Journal of Bridge Engineering,2008,13(2):166-175.
[3]全伟,李宏男.曲线桥多维地震时程分析主方向研究[J].振动与冲击,2008,27(8):20-24.QUAN Wei,LI Hong-nan.Main direction study on curve bridgeunder multi-dimensional time history analysis during earthquakes[J].Journal of Vibration and Shock,2008,27(8):20-24.
[4]耿江玮,朱东生,向中富,等.非规则连续梁桥非线性地震反应分析[J].重庆交通大学学报:自然科学版,2011,30(2):185-189.GENG Jiang-wei,ZHU Dong-sheng,XIANG Zhong-fu,et al.Thenonlinear seismic response analysis of irregular continuous bridge[J].Journal of Chongqing Jiaotong University:Natural Science,2011,30(2):185-189.
[5]李黎,吴璟,叶志雄.隔震曲线桥梁碰撞研究[J].工程抗震于加固改造,2008,30(5):48-54.LI Li,WU Jing,YE Zhi-xiong.Research on pounding of isolatedcurved bridge[J].Earthquake Resistant Engineering and Retrofit-ting,2008,30(5):48-54.
[6]王东升,冯启民,王国新.基于直杆共轴碰撞理论的桥梁地震反应邻梁碰撞分析模型[J].工程力学,2004,21(2):54-59.WANG Dong-sheng,FENG Qi-min,WANG Guo-xin.Analysismodel of pounding between adjacent bridge girders during earth-quakes based on collinear impact between rods[J].EngineeringMechanics,2004,21(2):54-59.
[7]朱东生,刘世忠,虞庐松.曲线桥地震反应研究[J].中国公路学报,2002,15(3):42-48.ZHU Dong-sheng,LIU Shi-zhong,YU Lu-song.Research on seis-mic response of curved girder bridges[J].China Journal of High-way and Transport,2002,15(3):42-48.
[8]Wilson E L,Button M R.Three-dimensional dynamic analysis formulti-component earthquake spectra[J].Earthquake EngineeringStructure Dynamics,1982,10(3):471-476.
[9]冯云田,李明瑞.复杂结构的弹性地震反应分析[J].地震工程与工程振动,1991,11(4):77-86.FENG Yun-tian,LI Ming-rui.Elasticity seismic response analysisof complex structure[J].Earthquake Engineering and EngineeringVibration,1991,11(4):77-86.
[10]JTG/T B02-01—2008公路桥梁抗震设计细则[S].北京:人民交通出版社,2008.
[2]Burdette N J,Elnashai A S.Effect of asynchronous earthquakemotion on complex bridge 2:Results and implications on assess-ment[J].Journal of Bridge Engineering,2008,13(2):166-175.
[3]全伟,李宏男.曲线桥多维地震时程分析主方向研究[J].振动与冲击,2008,27(8):20-24.QUAN Wei,LI Hong-nan.Main direction study on curve bridgeunder multi-dimensional time history analysis during earthquakes[J].Journal of Vibration and Shock,2008,27(8):20-24.
[4]耿江玮,朱东生,向中富,等.非规则连续梁桥非线性地震反应分析[J].重庆交通大学学报:自然科学版,2011,30(2):185-189.GENG Jiang-wei,ZHU Dong-sheng,XIANG Zhong-fu,et al.Thenonlinear seismic response analysis of irregular continuous bridge[J].Journal of Chongqing Jiaotong University:Natural Science,2011,30(2):185-189.
[5]李黎,吴璟,叶志雄.隔震曲线桥梁碰撞研究[J].工程抗震于加固改造,2008,30(5):48-54.LI Li,WU Jing,YE Zhi-xiong.Research on pounding of isolatedcurved bridge[J].Earthquake Resistant Engineering and Retrofit-ting,2008,30(5):48-54.
[6]王东升,冯启民,王国新.基于直杆共轴碰撞理论的桥梁地震反应邻梁碰撞分析模型[J].工程力学,2004,21(2):54-59.WANG Dong-sheng,FENG Qi-min,WANG Guo-xin.Analysismodel of pounding between adjacent bridge girders during earth-quakes based on collinear impact between rods[J].EngineeringMechanics,2004,21(2):54-59.
[7]朱东生,刘世忠,虞庐松.曲线桥地震反应研究[J].中国公路学报,2002,15(3):42-48.ZHU Dong-sheng,LIU Shi-zhong,YU Lu-song.Research on seis-mic response of curved girder bridges[J].China Journal of High-way and Transport,2002,15(3):42-48.
[8]Wilson E L,Button M R.Three-dimensional dynamic analysis formulti-component earthquake spectra[J].Earthquake EngineeringStructure Dynamics,1982,10(3):471-476.
[9]冯云田,李明瑞.复杂结构的弹性地震反应分析[J].地震工程与工程振动,1991,11(4):77-86.FENG Yun-tian,LI Ming-rui.Elasticity seismic response analysisof complex structure[J].Earthquake Engineering and EngineeringVibration,1991,11(4):77-86.
[10]JTG/T B02-01—2008公路桥梁抗震设计细则[S].北京:人民交通出版社,2008.
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