摘要
为研究寸滩长江大桥成桥受力性能,采用荷载试验的方法对其进行加载试验,提出了大跨度悬索桥的静载试验要点和加载效率范围,总结了该桥在加载工况作用下的加劲梁应力、主缆索力、主塔应力等参数的校验系数范围。同时,通过脉动和行车工况,分析了该桥的自振特性和动力响应。结果表明,该桥满足设计活载的正常使用要求。该桥荷载试验结论可供同类桥梁交工验收和后期养护参考。
In order to study the mechanical behavior based on the load test,of Cuntan Yangtze River Bridge key points and loading efficiency range of the static load test for long-span suspension bridges were proposed. It summarized the range of testing coefficient of the stiffening beam stress,main cable force,and tower stress under the loading condition. Meanwhile,through the cases of environment random excitation and driving at a certain speed, the vibration characteristics and dynamic response were analyzed. The results show that the bridge meets the normal use requirements of the design load. This conclusion can be used as a reference for the acceptance and maintenance of similar bridges.
出处
《公路交通技术》
2018年第4期68-75,共8页
Technology of Highway and Transport
关键词
主缆
荷载试验
加载效率
校验系数
动力响应
main cable
load test
loading efficiency
testing coefficient
dynamic response
