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Finite Element Model Updating of a Steel Pedestrian Bridge Model
Finite element (FE) modeling is widely used to simulate the behavior of actual structures under various loading conditions. However, the simulation results from an FE model are usually different from an as-built structure. To improve the accuracy of the FE model, selected structural parameters are to be updated, which is known as FE model updating. This paper discusses the updating of an FE model based on a steel pedestrian bridge on Georgia Tech campus. By setting structural parameters as optimization variables, FE model updating is formulated as optimization problems to minimize the difference between experimental and simulated frequency-domain modal properties. Two modal property difference formulations are presented, one using modal assurance criterion (MAC) values and the other using direct difference between mode shapes. For each updating formulation, derivative Jacobian of the objective function is derived in detail. The MATLAB code and data are available on GitHub.
Finite Element Model Updating of a Steel Pedestrian Bridge Model
Finite element (FE) modeling is widely used to simulate the behavior of actual structures under various loading conditions. However, the simulation results from an FE model are usually different from an as-built structure. To improve the accuracy of the FE model, selected structural parameters are to be updated, which is known as FE model updating. This paper discusses the updating of an FE model based on a steel pedestrian bridge on Georgia Tech campus. By setting structural parameters as optimization variables, FE model updating is formulated as optimization problems to minimize the difference between experimental and simulated frequency-domain modal properties. Two modal property difference formulations are presented, one using modal assurance criterion (MAC) values and the other using direct difference between mode shapes. For each updating formulation, derivative Jacobian of the objective function is derived in detail. The MATLAB code and data are available on GitHub.
Finite Element Model Updating of a Steel Pedestrian Bridge Model
Dong, Xinjun (author) / Wang, Yang (author)
ASCE International Conference on Computing in Civil Engineering 2019 ; 2019 ; Atlanta, Georgia
Computing in Civil Engineering 2019 ; 397-404
2019-06-13
Conference paper
Electronic Resource
English
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