The Chinese Journal of Nonferrous Metals
JOURNAL OF RAILWAY SCIENCE AND ENGINEERING
|第13卷 第2期 总第71期 2016年2月|
摘 要: 以南广铁路肇庆西江特大桥为工程背景，介绍高速铁路大跨度钢箱提篮拱桥的静动载试验和列车运行安全性试验方法。静载试验测试关键截面应力,挠度,梁端转角,支座位移及吊杆索力。动载试验对列车以不同速度过桥时关键截面的横、竖向动力响应进行量测，分析桥梁的动力特性。列车运行安全性试验对3个指标——轮对横向力、列车脱轨系数和轮重减载率进行计算，结合联调联试结果，对比分析货车和动车运行的稳定性。研究结果表明：该桥梁具有足够的强度和刚度，具有良好的静动力性能，同时验证了该桥梁设计的合理性和运营的安全性。
（1. School of Civil Engineering, Central South University, Changsha 410075, China;
2. National Engineering Laboratory for High Speed Railway Construction, Changsha 410075, China）
Abstract:Based on the Xijiang River Bridge of Nanning-Guangzhou railway as engineering background, the paper carried out the test research of static and dynamic loading and train running security of large-span steel-box handle basket arch bridges on high-speed railway. Throug static loading tests, the stress of key section, the deflection of girder, the angle of beam-end, the displacement of bearing and the tensile force of suspender were measured. Through dynamic loading tests, the horizontal and vertical dynamic response of key section when the train pass the bridge at different rates were measured, and the dynamic characteristics was analyzed. Based on train running security tests, the three operation safety indicators were calculated which are the lateral force of wheel, the derailment coefficient of train and the rate of wheel load reduction. According to the alignment joint-test, the running stability of the multiple unit and the freight trains were comparatively analyzed. It shows that the freight trains running on the bridge is safe and the bridge has enough strength and rigidity, good static and dynamic performance.
Key words: high-speed railway; steel-box handle basket arch bridge; static and dynamic loading test; running security; structure assessment