Influence of pier height on the safety of trains running on high-speed railway bridges during earthquakes
桥墩高度对地震下高速铁路桥上行车安全性影响研究作者机构：School of Civil EngineeringCentral South UniversityChangsha 410075China National Engineering Research Center of High-speed Railway Construction TechnologyCentral South UniversityChangsha 410075China
出 版 物：《Journal of Central South University》 (中南大学学报（英文版）)
年 卷 期：2024年第31卷第6期
页 面：2102-2115页
核心收录：
学科分类：070801[理学-固体地球物理学] 07[理学] 0806[工学-冶金工程] 0708[理学-地球物理学]
基 金：Projects(52022113,52278546)supported by the National Natural Science Foundation of China Project(2020EEEVL0403)supported by the China Earthquake Administration
主 题：pier height high-speed railway bridge running safety numerical model
摘 要：Sudden earthquakes pose a threat to the running safety of trains on high-speed railway bridges,and the stiffness of piers is one of the factors affecting the dynamic response of train-track-bridge *** this paper,a experiment of a train running on a high-speed railway bridge is performed based on a dynamic experiment system,and the corresponding numerical model is *** reliability of the numerical model is verified by ***,the experiment and numerical data are analyzed to reveal the pier height effects on the running safety of trains on *** results show that when the pier height changes,the frequency of the bridge below the 30 m pier height changes greater;the increase of pier height causes the transverse fundamental frequency of the bridge close to that of the train,and the shaking angle and lateral displacement of the train are the largest for bridge with 50 m pier,which increases the risk of derailment;with the pier height increases from 8 m to 50 m,the derailment coefficient obtained by numerical simulations increases by 75% on average,and the spectral intensity obtained by experiments increases by 120% on average,two indicators exhibit logarithmic variation.
维普期刊数据库