基于IDA和纤维模型的高墩大跨连续刚构桥梁地震反应分析
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摘要
基于纤维模型的有限元方法,建立了典型高墩大跨连续刚构桥的非线性数值分析模型。采用动力增量分析法,即IDA方法对结构进行了非线性动力时程分析,分别探讨了在纵桥向和横桥向地震作用下高墩连续刚构桥梁结构的破坏规律、最大位移和最大曲率的关系,高阶振型效应对高墩大跨连续刚构桥墩身内力和变形的影响及位移和曲率沿墩高变化的规律。
Based on the fiber model,the typical nonlinear numerical analysis model of long-span continuous rigid frame bridge with high pier is presented.IDA method is adopted for the nonlinear dynamic history analysis for the structure.The failur e law and the relationship between maximum displacement and maximum curvature of the element are discussed under earthquake in longitudinal and transversal dire ction respectively.The internal force and deformation of piers,affecting by th e high order vibration,and the displacement and curvature along the high of pie r are studied.
Based on the fiber model,the typical nonlinear numerical analysis model of long-span continuous rigid frame bridge with high pier is presented.IDA method is adopted for the nonlinear dynamic history analysis for the structure.The failur e law and the relationship between maximum displacement and maximum curvature of the element are discussed under earthquake in longitudinal and transversal dire ction respectively.The internal force and deformation of piers,affecting by th e high order vibration,and the displacement and curvature along the high of pie r are studied.
引文
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[2]梁智垚.桥梁高墩位移延性能力计算方法研究[J].工程抗震与加固改造,2005,27(5):57-62.
[3]李建中,宋晓东,范立础.桥梁高墩位移延性能力的探讨[J].地震工程与工程振动,2005,25(1):43-48.
[4]谢肖礼,王波,张伟峰,等.罕遇地震作用下高墩连续刚构桥双重非线性抗震分析[J].工程力学,2009,26(4):113-119.
[5]何钦象,田小红,宋丹.高墩大跨径连续刚构桥抗震性能评估[J].振动与冲击,2009,28(1):68-71.
[6]王宇.变墩高公路桥梁的地震易损性分析[D].上海:同济大学,2008.
[7]Dimitrios Vamvatsikos,Cornell C A.Incremental dy-namic analysis[J].Earthquake Engineering andStructural Dynamics,2002,31(3):491-514.
[8]Silvia Mazzoni,Frank McKenna,Michael H.Open Sys-tem for Earthquake Engineering Simulation User Manu-al[M].Pacific Earthquake Engineering Research Cen-ter,University of California,Berkeley,2005.
[9]Mazzoni S,Mckenna F,Scott M H,et al.OpenseesCommand Language Manual[R].America:The Re-gents of the University of California,2006.
[10]Menegotto M,Pinto P.Method of Analysis for Cycli-cally Loaded Reinforced Concrete Plane Frames Inclu-ding Changes in Geometry and Non-Elastic Behavior ofElements under Combined Normal Force and Bending[C]//IABSE Symposium on Resistance and UltimateDeformability of Structures,Lisbon,1973:15-22.
[11]黄怡君.高墩大跨连续刚构桥梁地震易损性研究[D].福州:福州大学,2008.
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