Dynamic response analysis of a multiple-beam structure subjected to a moving load  

作　　者：Zhang Yuntai Jiang Lizhong Zhou Wangbao Liu Shaohui Feng Yulin Liu Xiang Lai Zhipeng 

机构地区：[1]School of Civil Engineering,Central South University,Changsha 410075,China [2]National Engineering Laboratory for High Speed Railway Construction,Changsha 410075,China [3]School of Civil Engineering and Architecture,East China Jiaotong University,Nanchang 330013,China

出　　处：《Earthquake Engineering and Engineering Vibration》2022年第3期769-784,共16页地震工程与工程振动（英文刊）

基　　金：Supported by:National Natural Science Foundations of China under Grant Nos.U1934207 and 51778630;the Hunan Innovative Provincial Construction Project under Grant No.2019RS3009;the Innovation-driven Plan in Central South University under Grant No.2020zzts159;the Fundamental Research Funds for the Central Universities of Central South University under Grant No.2018zzts189。

摘　　要：In this study,the dynamic response of an elastically connected multi-beam structure subjected to a moving load with elastic boundary conditions is investigated.The boundary conditions and properties of each beam vary,and the difficulty of solving the motion equation is reduced by using a Fourier series plus three special transformations.By examining a high-speed railway(HSR)with mixed boundary conditions,the rationality for the newly proposed method is verified,the difference in simulated multiple-beam models with different beam numbers is explored,and the influence of material parameters and load speed on the dynamic response of multiple-beam structures is examined.Results suggest that the number of beams in the model should be as close to the actual beam number as possible.Models with an appropriate beam number can be used to describe in detail the dynamic response of the structure.Neglecting the track-structure can overestimate the resonant speed of a high-speed railway,simply-supported beam bridge.The effective interval of foundation stiffness(EIFS)can provide a reference for future engineering designs.

关 键 词：multiple-beam dynamic analysis moving load mixed boundary conditions 

分 类 号：TU311.3[建筑科学—结构工程]