Direct Calculation of Updating Parameters Based on Kriging Model for Bridge Finite Element Model Updating

To improve the calculation efficiency and to avoid the updating results being affected by optimization algorithms, a direct calculation of updating parameters method based on Kriging model for model updating is proposed in this paper. The proposed method first generates the data samples of updating parameters by using Latin hypercube Design (LHD). The corresponding structural response is calculated by initial finite element model. Then, the explicit function between updating parameters and structural responses is obtained based on kriging theory. Finally, the best design parameters are directly solved using the experimentally obtained structural response as the objective value based on the established Kriging model. Model updating of Caiyuanba Yangtze River Bridge is employed to test the proposed method. The results show that the model updating based on direct calculation method avoids the iterative calculation and improves the computational efficiency. The proposed method can provide the approximate accuracy level compared with the traditional Kriging model method.