In this paper, high-fidelity finite element (FE) models were developed to investigate the behavior of reinforced concrete (RC) beam-slab substructures to resist progressive collapse under a corner column removal scenario. The numerical models were validated by test results. Then, the validated FE models were employed to investigate the structural behavior under different loading methods, including concentrated loading (CL) and uniformly distributed loading (UDL) methods. Moreover, multi-story frames were built to capture the load redistribution behavior of substructures at different floors under different loading methods. The results indicated that the loading methods affect overall structural responses, load transfer mechanisms, and failure modes. It was demonstrated that the Vierendeel action could not be ignored for multi-story frames to resist progressive collapse caused by the loss of a corner column scenario. More significant Vierendeel action was developed in the structure subjected to CL method than that subjected to UDL method. It was also found that the load transfer mechanisms developed in the top story and bottom story for a multi-story frame are pretty different from those in the middle stories. The bottom story has the most remarkable load resisting capacity.

在本文中，开发了高保真有限元 (FE) 模型来研究钢筋混凝土 (RC) 梁板子结构在角柱拆除情况下抵抗连续倒塌的行为。数值模型得到了试验结果的验证。然后，采用经过验证的有限元模型来研究不同加载方法下的结构行为，包括集中加载 (CL) 和均匀分布加载 (UDL) 方法。此外，还构建了多层框架以捕捉不同楼层下不同荷载方法下子结构的荷载重新分配行为。结果表明，加载方法会影响整体结构响应、载荷传递机制和失效模式。证明了多层框架不能忽视 Vierendeel 作用，以抵抗因角柱丢失而导致的连续倒塌。CL 方法的结构比 UDL 方法的结构产生了更显着的 Vierendeel 作用。还发现在多层框架的顶层和底层开发的负载转移机制与中间层的负载转移机制有很大不同。底层具有最显着的抗负载能力。还发现在多层框架的顶层和底层开发的负载转移机制与中间层的负载转移机制有很大不同。底层具有最显着的抗负载能力。还发现在多层框架的顶层和底层开发的负载转移机制与中间层的负载转移机制有很大不同。底层具有最显着的抗负载能力。