1. School of Civil Engineering，Changsha University of Science and Technology，Changsha 410114，China；
2. Nanjing Anzheng Software Engineering Company with Limited Liability，Nanjing 210009，China
Aiming at finite element model updating for a long-span concrete cable-stayed bridge, a model updating method was proposed based on the multi-objective optimization to fully use the structure’s static and dynamic test data.The updating objective function was constructed using the structure’s static displacements and dynamic modal frequencies, etc.actual measured data, parameters to be updated were chosen based on the sensitivity analysis.The finite element model of a certain concrete cable-stayed bridge in China was updated with multi-objective optimization using the non-dominated sorting genetic algorithm-II (NSGA-II) to obtain Pareto optimal solution set to the problem of finite element model updating with multi objective optimization.The modified finite element model was verified with the measured static and dynamic data.The results showed that not only the updated model’s static displacements and dynamic calculation results involved in the optimization agree well with the measured values, but also the updated model’s static and dynamic calculation results not involved in the optimization are closer to the measured values; this static and dynamic finite element model updating method for the concrete cable-stayed bridge based on multi-objective optimization has a satisfactory effect, and the updated finite element model can accurately and fully simulate the actual structure.
彭 涛,田仲初 1,张建仁 1, 郑万泔 2. 基于多目标优化的混凝土斜拉桥静动力有限元模型修正[J]. 振动与冲击, 2018, 37(21): 108-116.
PENG Tao1, TIAN Zhongchu1, ZHANG Jianren1, ZHENG Wangan2. Static and dynamic finite element model updating for a concrete cable-stayed-bridge based on multi-objective optimization. JOURNAL OF VIBRATION AND SHOCK, 2018, 37(21): 108-116.
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