Abstract
The aim of this study is to investigate the effects of varying design variables on the structural behaviour of reinforced concrete (RC) sub-frames under progressive collapse. A finite element modelling approach is presented and validated against the experimental results concerning a 2D frame (3 columns and 2 beams) and a 3D frame (4 columns and 3 beams). The performance of the RC sub-frame is discussed by choosing the scenarios of the exterior, interior, and multiple column loss, respectively, and by increasing the number of stories and bays. Further studies are conducted based on the numerical method to reveal the effect of beam longitudinal reinforcement ratio (BLRR), beam section depth (BSD), and concrete compression strength (CCS). The results show that both BLRR, CCS and BSD have a significant influence on the compressive arch action (CAA) capacity of the structure under progressive collapse, and the load-carrying capacity of the RC sub-frame increases with an increasing number of stories.
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Acknowledgments
This study was funded by the National Key Research and Development Program of China (2017YFC0703702). The authors are grateful for the financial support of the Science Research Plan of the Shanghai Municipal Science and Technology Committee [20dz1201301, 21DZ1204704]. The first author is grateful for the support by the project of the Key Laboratory of Impact and Safety Engineering (Ningbo University), Ministry of Education [CJ202106], and the fifth author is grateful to the National Natural Science Foundation of China [52078201].
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Wang, F., Shah, S., Wang, X. et al. Investigation of the Structural Behaviour of RC Beam-Column Sub-frame Subjected to Progressive Collapse. KSCE J Civ Eng 26, 1782–1792 (2022). https://doi.org/10.1007/s12205-022-1861-z
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DOI: https://doi.org/10.1007/s12205-022-1861-z