广济2~#桥荷载试验及加固维护

Load test and reinforcement of Guangji 2# bridge

荷载试验是评估桥梁实际工作状态和承载能力最直接的方法,也是评定桥梁结构使用状况的有效方法。分析了广济2~#桥在三级加载状态下各控制点的挠度和应变等力学指标,介绍了广济2~#桥荷载试验的静载试验和动载试验过程,借助桥梁工程有限元分析软件MIDAS进行了建模,得出了对应工况满载下的理论计算值,并与实测值进行比较分析,阐明了桥梁结构承载能力与工作状态。根据荷载试验结果,广济2~#桥经加固设计后整体刚度得以提高,可满足规范要求。

Load test is the most effective and direct method for evaluating bridge bearing capacity. In this paper, through analysis on the deflection and strain index of the control points in Guangji 2# Bridge under the three level loading states, the static load lest and dynamic load test of the bridge have been introduced, the model has been established by the aid of the finite element analysis software MIDAS, and the theoretical calculation values of the con^sponding working conditions have been obtained, which have been compared with the measured values, then the bearing capacity and the working state of the bridge have heen expounded. According to the results of load test, after reinforcing, the stiffness of Guangji 2# Bridge has been improved, which could meet the specifications requirements.