Resonance analysis of a high-speed railway bridge using a stochastic finite element method  

作　　者：Xiang Ping Yan Weiran Jiang Lizhong Zhou Wangbao Wei Biao Liu Xiang 

机构地区：[1]Hunan International Scientific and Technological Innovation Cooperation Base of Advanced Construction and Maintenance Technology of Highway,Changsha University of Science and Technology,Changsha 410114,China [2]School of Civil Engineering,Central South University,Changsha 410075,China [3]School of Civil Engineering,Fujian University of Technology,Fuzhou 350118,China

出　　处：《Earthquake Engineering and Engineering Vibration》2023年第4期1015-1030,共16页地震工程与工程振动（英文刊）

基　　金：Open Fund of Hunan International Scientific and Technological Innovation Cooperation Base of Advanced Construction and Maintenance Technology of Highway(Changsha University of Science and Technology)Project Number kfj210803;National Natural Science Foundation of China under Grant Nos.U1934207 and 11972379;Fujian University of Technology under Grant No.GY-Z21181。

摘　　要：There is always some randomness in the material properties of a structure due to several circumstances and ignoring it increases the threat of inadequate structural safety reserves.A numerical approach is used in this study to consider the spatial variability of structural parameters.Statistical moments of the train and bridge responses were computed using the point estimation method(PEM),and the material characteristics of the bridge were set as random fields following Gaussian random distribution,which were discretized using Karhunen-Loève expansion(KLE).The following steps were carried out and the results are discussed herein.First,using the stochastic finite element method(SFEM),the mean value and standard deviation of dynamic responses of the train-bridge system(TBS)were examined.The effectiveness and accuracy of the computation were then confirmed by comparing the results to the Monte-Carlo simulation(MCS).Next,the influence of the train running speed,bridge vibration frequency,and span of the bridge on dynamic coefficient and dynamic response characteristics of resonance were discussed by using the SFEM.Finally,the lowest limit value of the vibration frequency of the simple supported bridges(SSB)with spans of 24 m,32 m,and 40 m are presented.

关 键 词：train-bridge system material randomness Karhunen-Loève expansion Gauss integral dynamic coefficient natural frequency 

分 类 号：U441.3[建筑科学—桥梁与隧道工程] U448.13[交通运输工程—道路与铁道工程]