基于挠度影响线进行桥梁有限元模型修正的研究

The Study on the Bridge Finite Element Model Updating Based on the Deflection Influence Line

通过挠度影响测试,获得车辆在不同位置下,各测点的实测挠度。将挠度测试数据转变为多工况下静载数据,采用最优化理论进行结构有限元模型修正,并与基于荷载试验数据的有限元模型修正结果进行对比,二者基本吻合。在此基础上,提出了基于挠度影响线测试技术进行桥梁结构受力性能评估的实用方法。

Through the deflection influence test, this paper obtained the measured deflection of each measuring point of the vehicle under the different positions. It converted the deflection test data to the static load data under multi conditions. Using the optimization theory, it carried out the structural finite element model updating, compared the finite element model updating results based on the load test data and found the two were basically agree with each other. On this basis, it also put forward the practical method for evaluating the mechanical performance of bridge structures based on the deflection influence line test technology.