基于动力时程分析的模型更新混合模拟方法

To reduce the accuracy degradation caused by boundary conditions, structural simplifications and the parameter errors of the numerical model in hybrid simulations, a model updating method based on time history analysis of full-structure was proposed. The numerical substructure model was replaced by the full-structure dynamic analysis model, and the physical substructure was used as the comparison target for parameter correction. The common numerical model of steel frame and reinforced concrete frame structure were established, and its independent constitutive parameters were selected as the update object. The substructures were divided at the elastic inflection points of the bottom column, and the virtual hybrid simulations were performed in four different conditions. The results show that, compared with the traditional hybrid simulation, this method effectively reduces the influence of simplified interface bending moment and parameter error. The application of uniform design in the model updating method guarantees the representativeness of candidate sample points and the accuracy of multi-parameter updating. At the same time, the stability and effectiveness of the method under different interface bending moments are verified.