基于动力时程分析的模型更新混合模拟方法

为降低混合模拟中边界条件及结构简化与数值结构参数误差带来的精度下降问题，提出基于全结构时程分析的模型更新方法，以全结构动力分析模型取代数值子结构模型，将试验子结构作为参数修正的对比目标。建立常见的钢框架与钢筋混凝土框架结构数值模型，筛选出其独立本构参数作为更新对象，以底层柱的弹性反弯点划分子结构，分别进行4种工况混合模拟仿真试验。研究结果表明：与传统混合模拟相比，该方法有效降低了界面弯矩简化与参数误差带来的影响，采用均匀设计的更新方法有效保证参数更新点的代表性，确保多参数更新识别的准确率，有效提升混合模拟精度；同时验证该方法在不同界面弯矩处理下的稳定性与有效性。

Model updating method for hybrid simulation based on dynamic time history analysis

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.