This paper investigates the effects of uncertainties and modeling errors on the performance of nonlinear updating process through an experimental study on two 1/8‐scale four‐story steel moment‐resisting frames. To examine the accuracyo of the models calibrated using different data features and modeling assumptions, the actual structural responses obtained from shaking table tests and the response of the models have been compared. The modeling uncertainties are investigated by applying frames with different modeling assumptions, including concentrated and distributed plasticity, and different hysteretic material behaviors. To calibrate the models, four data features are considered and combined: (1) acceleration time history, (2) displacement time history, (3) instantaneous characteristics of the decomposed monocomponent of the response, and (4) dissipated energy. In this paper, a sensitivity analysis has been performed to investigate the effect of various parameters of hysteretic materials on the response of reference steel moment‐resisting frames. To this end, the optimum values of the unknown parameters are determined through minimizing the objective function defined based on the residuals of data features for the actual structure and finite element (FE) model. By comparing the structural responses of the model with concentrated plasticity calibrated by instantaneous characteristics with those of the other models, it can be concluded that the concentrated plasticity model predicts a more accurate response compared to the other models. Consequently, the aleatory uncertainty was taken into account by evaluating the performance of the system with concentrated plasticity under 40 seismic ground motions, and the structural response has been obtained through the calibrated model.

中文翻译：

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地震作用下钢制弯矩框架的损伤检测

本文通过在两个1/8比例的四层钢制抗弯框架上进行实验研究，研究了不确定性和建模误差对非线性更新过程性能的影响。为了检查使用不同数据特征和建模假设校准的模型的准确性，比较了从振动台试验获得的实际结构响应和模型的响应。通过应用具有不同建模假设的框架（包括集中和分布的可塑性以及不同的滞后材料行为）来研究建模不确定性。为了校准模型，考虑并组合了四个数据特征：（1）加速时间历史，（2）位移时间历史，（3）分解后的单组分的瞬时特征，（4）耗散的能量。本文进行了敏感性分析，以研究滞后材料的各种参数对参考钢抗力矩框架响应的影响。为此，通过最小化基于实际结构和有限元（FE）模型的数据特征残差定义的目标函数来确定未知参数的最佳值。通过将通过瞬时特性校准的集中可塑性模型的结构响应与其他模型的结构响应进行比较，可以得出结论，与其他模型相比，集中可塑性模型预测的响应更准确。所以，