桥梁结构荷载试验分析与研究

Analysis of loading test of bridge structure

对金砂-汕樟立交桥的荷载试验结果进行分析,根据设计资料建立三维有限元模型,对相应工况进行模拟,通过模型计算值与实测挠度、应变与频率各参数的对比和分析,了解桥梁结构在各种作用力下的实际受力状态和工作状况,判别已建桥梁符合设计标准,满足使用要求。测试结果可以为有限元模型修正提供依据,同时也为桥梁使用状态评估、健康监测提供较可靠的基准模型。

This paper aims to demonstrate the built bridge still in accordance with design standards and satisfying the use requirement through analyzing the results of loading test on Jinsha-Shanzhang overpass.According to design information,a theoretical model is built for simulating each condition with the finite element analysis software Midas-Civil.A comparison is carried out over parameters such as deflection,strain and frequency to detect the actual mechanical behavior and operating condition of bridge structure under various working forces.The experimental results can provide basis and references for the rectification of finite element model and final acceptance of construction,also for the evaluation of service behavior and health monitoring of the bridge.