The progressive collapse resistance of reinforced concrete (RC) frames in which a middle column has been removed has been investigated by many researchers. However, previous experimental and computational studies have focused mainly on the catenary action provided by longitudinal reinforcement in the beams spanning the missing column. This study investigated the contribution of infill walls. Finite-element analysis was used after calibrating a reference model using test results reported by other researchers. Models were developed for a RC frame with and without infill walls. An equivalent strut was used in the infill walls to allow the removed column load to be transferred through the struts instead of developing catenary action in the beams. A simplified model of the progressive collapse resistance of frames with infill walls was then derived to estimate the peak strength provided by the infill wall under the scenario of middle-column removal.

中文翻译：

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柱拆除后填充墙与钢筋混凝土框架之间的相互作用

许多研究人员已经研究了拆除中间柱的钢筋混凝土 (RC) 框架的连续倒塌抗力。然而，以前的实验和计算研究主要集中在跨越缺失柱的梁中纵向钢筋提供的悬链线作用。本研究调查了填充墙的贡献。在使用其他研究人员报告的测试结果校准参考模型后使用有限元分析。模型是为带有和不带有填充墙的 RC 框架开发的。在填充墙中使用了一个等效的支柱，以允许移除的柱荷载通过支柱转移，而不是在梁中产生悬链线作用。