论文部分内容阅读
介绍了作为预应力混凝土连续梁桥的通扬运河特大桥的环境激励振动试验,并利用基于频域空间域分解的运行模态分析法进行模态参数识别,得到大桥的动力特性测试结果(模态频率和振型)。建立了大桥的初始空间有限元模型,利用上述测试结果,基于遗传算法对模型进行了修正,获得能基本准确反映上述桥梁实际结构动力行为的基准有限元模型,它可用于大桥的健康检测、状态评估和损伤识别。
The environmental excitation vibration test of Tongyang Canal Bridge as prestressed concrete continuous girder bridge was introduced. The modal parameters identification was carried out by using the modal analysis of operation mode based on frequency domain decomposition of space domain. The test results of the dynamic characteristics of the bridge State frequency and mode shape). The initial space finite element model of the bridge is established. Based on the above test results, the model is modified based on the genetic algorithm to obtain the basic finite element model which can basically accurately reflect the dynamic behavior of the bridge. It can be used in the bridge health detection, Assessment and damage identification.