铁路桥梁与高速列车的动力试验研究  

EXPERIMENTAL STUDY ON A RAILWAY BRIDGE AND HIGH SPEED TRAINS

作　　者：夏禾[1] 张楠[1] 高日[1] 黄绚晔[1] 

机构地区：[1]北京交通大学土木建筑工程学院,北京100044

出　　处：《工程力学》2007年第9期166-172,共7页Engineering Mechanics

基　　金：国家自然科学基金项目(50478059);北京交通大学科技基金项目(2004SZ005)

摘　　要：在我国秦沈客运专线狗河大桥进行了高速列车作用下的动力试验。试验桥梁由跨度24m的多跨预应力混凝土简支箱梁构成,试验荷载为我国自行制造的中华之星和先锋号列车,其最高试验速度分别达到321.5km/h和290km/h。通过现场试验和实验结果分析,得到了桥梁的频率、阻尼等自振特性,梁的动挠度和横向位移、梁体振动加速度、墩顶横向位移等动力响应,以及车辆的脱轨系数、轮重减载率、轮轨力、车体振动加速度等动力特性。试验结果表明客运专线24m预应力混凝土箱梁在高速列车作用下的各项动力学指标良好,中华之星和先锋号高速列车具有良好的行车安全性和平稳性。The dynamic experiments were carried out on Gouhe Bridge of Qinghuangdao-Shenyang Special Passenger Railway in China. The bridge is composed of multi-span simply-supported 24m-span PC girders with box section. The loads are the China-Star and Pioneer high-speed trains made in China, whose experimental speed reached 321.Skm/h and 290km/h, respectively. The main measured data include the modal properties and dynamic responses of the bridge such as natural frequencies and damping ratios, girder deflections and lateral displacements, girder accelerations and lateral pier-top displacements, and the train vehicle responses such as derailment factors, offload factors, wheel-rail forces and vehicle body accelerations. The experimental results show that the bridge possesses good dynamic property and the China-Star and Pioneer high-speed trains have good running safety and stability.

关 键 词：桥梁工程 试验研究 客运专线 简支箱梁 高速列车 动力响应 行车安全 

分 类 号：TU311.3[建筑科学—结构工程] U441.3[建筑科学—桥梁与隧道工程]