Comparative and Parametric Studies on Behavior of RC-Flat Plates Subjected to Interior-Column Loss
Publication: Journal of Structural Engineering
Volume 146, Issue 9
Abstract
To investigate the influence of critical parameters on the progressive collapse resistance of reinforced concrete (RC)-flat plates, a set of finite-element modeling techniques was established. The modeling of bond-slip behavior between concrete and rebars was especially highlighted, which was found to have a significant impact on the performance of flat plates. Employing the modeling strategy, our previously tested flat plate substructure (S-1) and a similar specimen (ND) in the literature were simulated for model validation. Key structural behaviors, including tensile membrane and suspension actions in the large deformation stage, could be accurately replicated. Further, the validated S-1 model was used to conduct a series of parametric studies in which the influence of concrete strength, slab thickness, and reinforcement ratio on the collapse performance was examined. The results indicated that the concrete strength and the slab thickness only affected the slab flexural capacity with no impact on the load-carrying capacity after the initial flexural/shear failure. Moreover, the load-carrying capacity due to tensile membrane action was primarily governed by the reinforcement ratio. Further examination on the lateral stiffness suggested a lower bound ultimate flexural strength enhancement of 17%, due to the compressive membrane action, can be obtained.
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Data Availability Statement
Some or all data, models, or code used during the study were provided by a third party. LS-DYNA software was employed to create numerical models and to solve problems. Direct request for these materials may be made to the provider: http://www.lstc.com/. Some or all data, models, or code that support the findings of this study are available from the corresponding author upon reasonable request. These materials include the bond-slip model code and numerical models of RC-flat plate substructures.
Acknowledgments
Financial support provided by the Australian Research Council through a Discovery Project DP150100606 is gratefully acknowledged.
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Published In
Journal of Structural Engineering
Volume 146 • Issue 9 • September 2020
Copyright
©2020 American Society of Civil Engineers.
History
Received: Nov 18, 2019
Accepted: Apr 2, 2020
Published online: Jun 26, 2020
Published in print: Sep 1, 2020
Discussion open until: Nov 26, 2020
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