武汉天兴洲公铁两用长江大桥主桥荷载验收试验研究  

Study of Acceptance Load Testing of Main Bridge of Wuhan Tianxingzhou Changjiang River Rail-cum-Road Bridge

作　　者：武勇[1] 

机构地区：[1]成都铁路局,四川成都610081

出　　处：《桥梁建设》2010年第1期11-16,共6页Bridge Construction

摘　　要：武汉天兴洲公铁两用长江大桥主桥为(98+196+504+196+98)m双塔三索面钢桁梁斜拉桥,上层6车道公路、下层4线铁路,是目前世界上主跨跨度、设计荷载最大的公铁两用钢桁梁斜拉桥。大桥的荷载验收工作突破常规,采用科研的思路和方法。主要内容有静力试验、动载试验和前期关键技术研究成果的实桥验证,首次从系统动力学的角度出发对车辆、桥梁和轨道的动力特性及动力响应进行了全面、系统的评估。根据相关标准、规范系统总结出一套完善的新型结构公铁两用桥梁荷载验收的标准和方法。第一期试验结果表明:大桥在设计荷载作用下具有足够的强度和刚度,满足设计要求;在试验速度80 km/h下,列车运行的平稳性、安全性和主桥结构的动力性能满足相关规范和设计要求。The main bridge of Wuhan Tianxingzhou Changjiang River Rail-cum-Road Bridge is a double pylon and triple cable plane steel truss girder cable-stayed bridge with span arrangement （98＋196＋504＋196＋98） m and with a six-lane roadway arranged on the upper deck and a four-track railway arranged on the lower deck of the bridge. The bridge is currently a rail-cumroad steel truss girder cable-stayed bridge having the longest main span and the heaviest designed load in the world. The acceptance load testing of the bridge breaks away from conventions and is carried out in a way of scientific research conception and practice. The contents of the testing mainly incorporate the static load test, dynamic load test as well as the verification of some early stage key technique researches on the actual bridge and the dynamic behavior and dynamic response of the vehicles, bridge and tracks have been evaluated for the first time all-roundedly and systematically form the angle of the system dynamics. In accordance with the related standards and codes, a set of the perfect criteria and methods for the acceptance load testing of the new type of the rail-cum-road bridge structure is systematically summarized. The results of the first phase testing of the bridge prove that under the action of the designed load, the bridge has sufficient strength and rigidity and can satisfy the design requirements. At the testing running speed of 80 km/h, the stability and safety of the running of trains on the bridge and the dynamic performance of the bridge structure can also satisfy the requirements in the related standards, codes and design.

关 键 词：天兴洲大桥 公路铁路两用桥 荷载试验 静力试验 动载试验 验收标准 

分 类 号：U448.121[建筑科学—桥梁与隧道工程] U446[交通运输工程—道路与铁道工程]