【作者】 曹迈； 袁泽； 肖雄； 李全旺；

【Author】 CAO Mai;YUAN Ze;XIAO Xiong;LI Quan-wang;Department of Civil Engineering, Tsinghua University;

【机构】 清华大学土木工程系；

【摘要】 随着有限元(FE)软件的发展,框架结构的地震评估精度有了很大的提高。传统的精细化有限元建模虽然精确,但计算量大,难以进行快速评估;简化的有限元模型提供更快的评估,但通常需要强大的计算平台,并且可能无法完全捕获结构特征。为了平衡效率和准确性,文献中开发了代理模型。这些模型代替了精细的有限元模型,提高了计算效率。然而,直接使用结构响应来训练代理模型可能会导致非收敛问题。本文提出了一种基于克里金代理模型的地震风险快速评估方法,对结构响应进行排序,并使用分位数值训练克里金模型,然后拟合响应的分布曲线进行易损性分析。通过对框架结构的地震风险评估,验证了该方法的准确性和有效性。更多还原

【Abstract】 With advances in finite element(FE) software, seismic assessment accuracy of frame structures has greatly improved. Traditional refined finite element modeling, while precise, is computationally intensive and impractical for rapid assessments. Simplified FE models offer faster evaluations but often require powerful computing platforms and may not fully capture structural characteristics. To balance efficiency and accuracy,surrogate models have been developed. These models substitute refined FE models to enhance computational efficiency. However, using structural responses directly to train surrogate models can lead to non-convergence issues.This paper proposes a rapid seismic risk assessment method using the Kriging surrogate model. Structural responses are sorted, and quantile values are used to train the Kriging model. Distribution curves of the responses are then fitted for fragility analysis. The method’s accuracy and effectiveness are validated through the seismic risk assessment of frame structures.更多还原