爆炸荷载下基于子结构的RC框架抗连续倒塌分析OA北大核心

This study investigated the blast damage range and computational efficiency of progressive collapse analysis for reinforced concrete(RC)frame structures by combining investigations of blast damage to building structures with refined numerical simulations.The validity of the RC frame struc-ture model based on LS-DYNA was verified,and a substructure-based method for collapse resistance analysis of RC frame structure under blast loading was proposed,including selecting substructures from blast-damaged regions and properly calculating their boundary conditions.By conducting collapse resistance analysis on a typical 5-story RC frame structure under blast loading using full-structure and the proposed substructure methods,the effectiveness and efficiency of the proposed substructure meth-od were examined.The results showed that the proposed substructure method could accurately predict the damage range and collapse behavior of RC frame structures under given blast loading,while reduc-ing computational time by 72.7%compared with the full-structure method.