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本文在文献[1]建立的润扬悬索桥主塔的初始有限元模型基础上,采用基于灵敏度分析的模型参数修正方法,结合主塔动力特性的测试结果对主塔的初始有限元模型进行了动力修正。通过三种修正方案的比较,可以看出考虑梁柱节点刚域的影响以及修正参数的上、下限值约束的修正方案最可行。修正后的润扬悬索桥主塔模型能全面、正确地反映主塔结构的动力特性,可作为主塔结构健康监测与安全评估的基准有限元模型。
Based on the initial finite element model of the main tower of Runyang Suspension Bridge established in [1], the model parameter correction method based on sensitivity analysis is used in combination with the test results of the dynamic characteristics of the main tower to power the initial finite element model of the main tower Fixed. Through the comparison of the three correction schemes, it can be seen that the correction scheme considering the influence of the rigid-body of the beam-column node and the constraints of the upper and lower limit of the correction parameters is the most feasible. The modified Runyang Suspension Bridge pylon model can comprehensively and correctly reflect the dynamic characteristics of the main tower structure and can be used as the baseline finite element model for the health monitoring and safety assessment of the pylon structure.