摘要
针对铁路提速后出现的上承式简支钢板梁桥跨中横向振幅过大的问题,以羊楼司桥(L=32m单跨上承式简支钢板梁桥)为例进行实桥检测和数值模拟,建立车辆、线路、桥梁三者的联合模型,考虑轮轨接触力,应用MSC/DYTRAN大型结构分析程序进行车线桥动力相互作用的仿真分析。研究揭示我国用量最多的C62型货车以70∽80km/h的速度空载通过时,该跨度的钢板梁桥发生横向谐振的机理。此外,用该方法对32m跨长的组合梁结构进行桥梁动力特性及列车走行性分析,表明该结构满足提速货车和高速电动旅客列车走行的要求。研究结果对我国高速铁路桥梁建设和既有桥梁的改造具有积极意义。
In order to investigate the reason for the lateral resonance aroused from the simple I-type steel girder, dynamic test and the numerical simulation are conducted for the YangLouSi Bridge （ L = 32m simple I-type steel girder）. The finite element method is employed in establishing the calculation model for the vehicle-track-bridge system, and MSC/DYTRAN is adopted in the calculation of contact force between wheel and rail and in analyzing the structure system dynamic response. The study makes clear the mechanism of the lateral resonance aroused from the simple I-type steel girder when the widely employed C62 freight trains passing through at the speed of 70 - 80 km/h. Moreover, analyses of the dynamic response of composite beam and the running quality of the high-speed electrical passenger train are carried out, and the results indicate that this type of bridge satisfies the service needs of freight trains running with increase speed and high-speed passenger trains. The achievements of the study have positive influence on the construction of high speed railways and the rebuilding of existing bridges.
出处
《土木工程学报》
EI
CSCD
北大核心
2005年第12期70-75,共6页
China Civil Engineering Journal
关键词
上承式钢板梁
横向拍振
轮轨接触力
仿真分析
组合梁
走行性
I-type steel girder
lateral resonance
contact force between wheel and rail
numerical simulation
composite beam
running quality
