Seismic response analysis of road vehicle-bridge system for continuous rigid frame bridges with high piers

作     者：Li Yongle Chen Ning Zhao Kai Liao Haili Li Yongle1;Chen Ning1;Zhao Kai1;2 and Liao Haili1 1. Department of Civil Engineering;Southwest Jiaotong University;Chengdu 610031;China 2. CCCC Highway Consultants CO.;Ltd.;Beijing 100088;China

作者机构：Department of Civil EngineeringSouthwest Jiaotong University CCCC Highway Consultants CO.Ltd. 

出 版 物：《Earthquake Engineering and Engineering Vibration》 (地震工程与工程振动（英文刊）)

年 卷 期：2012年第11卷第4期

页      面：593-602页

核心收录：

学科分类：081406[工学-桥梁与隧道工程] 08[工学] 0814[工学-土木工程] 082301[工学-道路与铁道工程] 0823[工学-交通运输工程] 

基　　金：National Natural Science Foundation of China under Grant NNSF-50508036 New Century Excellent Talents in University of China Under Grant NCET-06-0802 Outstanding Young Academic Leaders Program of Sichuan Province Under Grant 2009-15-406 

主　　题：vehicle-bridge system coupling vibration seismic effects safety dynamic response 

摘      要：The objective of this study is to investigate the effects of earthquakes on road vehicle-bridge coupling vibration systems. A two-axle highway freight vehicle is treated as a 13 degree-of-freedom system composed of several rigid bodies, which are connected by a series of springs and dampers. The framework of the earthquake-vehicle-bridge dynamic analysis system is then established using an earthquake as the extemal excitation. The equivalent lateral contact force serves as the judgment criteria for sideslip accidents according to reliability theory. The entire process of the vehicle crossing the bridge is considered for a very high pier continuous rigid frame bridge. The response characteristics of the vehicle and the bridge are discussed in terms of various parameters such as earthquake ground motion, PGA value of the earthquake, incident angle, pier height, vehicle speed and mass. It is found that seismic excitation is the most influential factor in the responses of the vehicle-bridge system and that the safety of vehicles crossing the bridge is seriously impacted by the dual excitations of earthquake and bridge vibration.