中国铁道科学2011，Vol.32Issue(6)：34-40,7.
车桥耦合动力分析中地震动输入模式的研究
Study on the Input Patterns of Seismic Ground Motion in the Dynamic Interaction Analysis of Train-Bridge System
摘要
Abstract
On the basis of the characteristics of dynamic interaction of train-bridge system during earthquakes, simplified and multiple-degree-of-freedom models are established to carry out the dynamic analysis of coupling system. Then, the displacement or acceleration input patterns of seismic ground motion are compared in their characteristics and applicability through theoretical derivations. A high-speed train with eight vehicles running over a 3-span steel truss-arch bridge subjected to earthquakes is taken as a case study in consideration of the wave passage effect. The dynamic interactions of train-bridge under the acceleration and displacement input patterns are solved and compared. The theoretical analysis and numerical results show that the displacement input pattern is applicable for all wheel-rail interactions while the acceleration input pattern is only suited for linear case in consideration of the influence of the pseudo-static components. The use of the acceleration input pattern for non-linear case may lead to the severe underestimation of the dynamic response of train-bridge system when the train speed is more than 80 m · S-1.关键词
车桥系统/动力分析/地震动输入模式/位移输入模式/加速度输入模式/轮轨关系Key words
Train-bridge system/Dynamic analysis/Seismic ground motion input pattern/Displacement input pattern/Acceleration input pattern/Wheel rail interaction分类
交通工程引用本文复制引用
杜宪亭,夏禾,余竹..车桥耦合动力分析中地震动输入模式的研究[J].中国铁道科学,2011,32(6):34-40,7.基金项目
国家自然科学基金资助项目(51178025) （51178025）
中央高校基本科研业务费专项资金资助项目(2009JBM078) （2009JBM078）
比利时-中国政府间合作项目(BIL07/07) （BIL07/07）
