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Effects of Infill Walls on Load Resistance of Multi-Story RC Frames to Mitigate Progressive Collapse

Qian, K., Lan, D., Li, S. & Fu, F. ORCID: 0000-0002-9176-8159 (2021). Effects of Infill Walls on Load Resistance of Multi-Story RC Frames to Mitigate Progressive Collapse. Structures, 33, pp. 2534-2545. doi: 10.1016/j.istruc.2021.06.015


To study the effects of infill wall on progressive collapse resistance of reinforced concrete (RC) frames with slabs, a macro finite element (FE) model was built using general purpose software OpenSees. The FEmodel was validated by existing test results. Then, the model was subsequently used to predict the progressive collapse potential of eight-storyRC frame including slabs and infill walls. The numerical studies demonstrated that the inclusion of the slabs and infill walls could increase the ultimate load and initial stiffness by 70% and 169%, respectively, compared with the bare frame. The infill walls not only changed the load resisting path but also effectively improved the load redistribution ability of the frame. To evaluate the reliability of using a two-story sub-structure to investigate the progressive collapse behavior of a multi-story building, the resistance of each story of a multi-story building in case of column missing is compared. It was found that the resistance of each story was similar, except the first story. Finally, a series of parameter studies were carried out to quantify the effects of opening ratio, thickness and compressive strength of the infill wallson the progressive collapse performance of RC frame.

Publication Type: Article
Additional Information: This article has been published in Structures. © 2021 Institution of Structural Engineers. Published by Elsevier Ltd. All rights reserved.
Publisher Keywords: progressive collapse; infill wall; RC frame structure; numerical simulation
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
Departments: School of Science & Technology > Engineering
SWORD Depositor:
[thumbnail of Infill wall-City deposit.pdf]
Text - Accepted Version
Available under License Creative Commons Attribution Non-commercial No Derivatives.

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