大跨多塔悬索桥纵向地震碰撞反应参数研究
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摘要
针对大跨桥梁在地震作用下伸缩缝处的碰撞现象,以一座大跨三塔悬索桥为工程背景,建立了考虑墩柱弹塑性的空间非线性碰撞模型,采用非线性时程法详细分析了碰撞刚度、碰撞初始间隙等因素对碰撞效应的影响。分析结果表明:碰撞刚度在可能范围内取值,碰撞效应的变化不明显,碰撞刚度不是敏感参数;碰撞初始间隙是一个敏感参数,其大小对于碰撞效应有一定的影响,初始间隙比的变化对主引桥相对位移和引桥梁端位移影响比较明显。
Based on the pounding phenomenon at expansion joints of a long-span multi-tower suspension bridge,subjected to longitudinal earthquake,a complex nonlinear model considering elasto-plastic behaviors of piers and pound responses between main span and approach span was developed.The effects of some pounding parameters,such as,pounding stiffness,and initial gap at expansion joints were studied.The results indicated that the pounding stiffness is not a senstive parameter and its effect on pound responses is not obviously;but the initial gap at expansion joint has important effects on pounding,it has obvious effect on relative displacement between main span and approach span and the displacement of main girder.
Based on the pounding phenomenon at expansion joints of a long-span multi-tower suspension bridge,subjected to longitudinal earthquake,a complex nonlinear model considering elasto-plastic behaviors of piers and pound responses between main span and approach span was developed.The effects of some pounding parameters,such as,pounding stiffness,and initial gap at expansion joints were studied.The results indicated that the pounding stiffness is not a senstive parameter and its effect on pound responses is not obviously;but the initial gap at expansion joint has important effects on pounding,it has obvious effect on relative displacement between main span and approach span and the displacement of main girder.
引文
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[2]Chouw N,Hao H.Study of SSI and non-uniform groundmotion effect on pounding between bridge girders[J].SoilDynamics and Earthquake Engineering,2005,25:717-728.
[3]Jankowski R,Wilde K,Fujino Y.Reduction of poundingeffects in elevated bridges during earthquakes[J].Earthquake Engineering and Structural Dynamics.2000,29:195-212.
[4]Jankowski R,Wilde K,Fujino Y.Pounding of superstructuresegments in isolated elevated bridge during earthquakes[J].Earthquake Engineering and Structural Dynamics.1998,27:487-502.
[5]Ruangrassamee A,Kawashima K.Relative displacementresponse spectra with pounding effect.12wcee(2000),paperNo.1957.
[6]Ruangrassamee A,Kawashima K.Relative displacementresponse spectra with pounding effect[J].EarthquakeEngineering and Structural Dynamics,2001,30:1511-1538.
[7]王军文,李建中,范立础.非规则梁桥伸缩缝处的碰撞对地震反应的影响[J].土木工程学报,2006,30(1):54-59.
[8]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.
[9]Maison B F,kasai K.Analysis for type of structural pounding[J].J.Struct.Eng.ASCE,1990,116(4):957-977.
[10]Muthukumar S.A contact element approach with hysteresisdamping for the analysis and design of pounding in bridges[D].2003,11.
[11]OpenSees Command Language Manual[M].PacificEarthquake Engineering Research Center,University ofCalifornia,Berkeley,OpenSees version 1.7.3.2007.
[12]Taucer F F,Enrico S.Fiber beam-column model for seismicresponse analysis of reinforced concrete structures[R].EERC 91-17,1991.
[13]Kent D C,Park R.Flexural members with confined concrete[J].Journal of The Structural Division,ASCE,1971,97(7):1969-1990.
[14]Filippou.A simple model for reinforcing bar anchoragesunder cyclic excitations[J].Journal of The StructuralDivision,ASCE,1986,112(7):1639-1659.
[15]Menegotto M,Pinto P E.Method of Analysis for CyclicallyLoaded Reinforced Concrete Plane Frames Including Changesin Geometry and Non-Elastic Behavior of Elements underCombined Normal Force and Bending[C].Proceedings,IABSE Symposium on Resistance and Ultimate Deformabilityof Structures,Lisbon,1973.15-22.
[16]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):157-166.
[17]王东升,王国新,冯启民.桥梁结构地震反应邻梁碰撞分析等效刚体模型[J].工程力学,2004,21(8):81-85.
[2]Chouw N,Hao H.Study of SSI and non-uniform groundmotion effect on pounding between bridge girders[J].SoilDynamics and Earthquake Engineering,2005,25:717-728.
[3]Jankowski R,Wilde K,Fujino Y.Reduction of poundingeffects in elevated bridges during earthquakes[J].Earthquake Engineering and Structural Dynamics.2000,29:195-212.
[4]Jankowski R,Wilde K,Fujino Y.Pounding of superstructuresegments in isolated elevated bridge during earthquakes[J].Earthquake Engineering and Structural Dynamics.1998,27:487-502.
[5]Ruangrassamee A,Kawashima K.Relative displacementresponse spectra with pounding effect.12wcee(2000),paperNo.1957.
[6]Ruangrassamee A,Kawashima K.Relative displacementresponse spectra with pounding effect[J].EarthquakeEngineering and Structural Dynamics,2001,30:1511-1538.
[7]王军文,李建中,范立础.非规则梁桥伸缩缝处的碰撞对地震反应的影响[J].土木工程学报,2006,30(1):54-59.
[8]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.
[9]Maison B F,kasai K.Analysis for type of structural pounding[J].J.Struct.Eng.ASCE,1990,116(4):957-977.
[10]Muthukumar S.A contact element approach with hysteresisdamping for the analysis and design of pounding in bridges[D].2003,11.
[11]OpenSees Command Language Manual[M].PacificEarthquake Engineering Research Center,University ofCalifornia,Berkeley,OpenSees version 1.7.3.2007.
[12]Taucer F F,Enrico S.Fiber beam-column model for seismicresponse analysis of reinforced concrete structures[R].EERC 91-17,1991.
[13]Kent D C,Park R.Flexural members with confined concrete[J].Journal of The Structural Division,ASCE,1971,97(7):1969-1990.
[14]Filippou.A simple model for reinforcing bar anchoragesunder cyclic excitations[J].Journal of The StructuralDivision,ASCE,1986,112(7):1639-1659.
[15]Menegotto M,Pinto P E.Method of Analysis for CyclicallyLoaded Reinforced Concrete Plane Frames Including Changesin Geometry and Non-Elastic Behavior of Elements underCombined Normal Force and Bending[C].Proceedings,IABSE Symposium on Resistance and Ultimate Deformabilityof Structures,Lisbon,1973.15-22.
[16]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):157-166.
[17]王东升,王国新,冯启民.桥梁结构地震反应邻梁碰撞分析等效刚体模型[J].工程力学,2004,21(8):81-85.
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