三棵树跨线桥静动载试验分析

三棵树跨线桥经过多年的运营,桥梁结构出现了不同程度的病害,为了解桥梁的实际工作状态和承载能力,进行了静动载试验。该文阐述了经静动载试验,测定桥跨结构的强度、刚度以及动力特性。试验结果分析表明:桥跨结构基本处于弹性工作状态,强度和刚度满足设计荷载要求,但主梁间无可靠联系,呈现单梁受力;桥面破损冲击系数较大,阻尼较大对减少结构振动有利。然后,针对静动载试验结果,对该桥提出了维修与加固建议。

Analysis on Static and Dynamic Load Test of Sankeshu Overpass Bridge

The bridge structure of Sankeshu Overpass Bridge has appeared the different diseases after years of operation. In order to understand the actual working condition and the bearing capacity of the bridge, the static and dynamic tests are taken. Through the static and dynamic tests, the stiffness, strength and dynamic characteristics of bridge structure are measured. The test results indicate that the bridge span structure is basically at the flexible working condition, and the strength and stiffness also meet...