基于ANSYS对斜拉桥结构状况评估的有限元修正模型

Initial FE model reseach based on ANSYS software in built cable-stayed bridge

针对运营多年的斜拉桥结构状态变化的情况,研究基准有限元模型的建立过程。基于ANSYS平台,建立三主梁模型;通过不断修正拉索实常数,使拉索索力与静动载试验实测索力相一致,并将模型计算结果与静动载试验结果进行对比分析。研究结果表明:修正索力后的三主梁模型能作为既有斜拉桥的基准有限元模型。

To the change of state for the cable-stayed bridge structural operating for many years,the reseach for adjusting of cable forces provide the building process of the initial finite element model.Cable force was iteratively updated until the analytical cable force was in good agreement with those measured,the triple-girder model based on ANSYS software was established.Then,the measurement results of static and dynamic load testing were taken as reference to model calculation results.The results show that the triple-girder model updated the cable forces can be accomplished as the baseline finite element model of built cable-stayed bridge.