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Progressive collapse mode induced by slab-column joint failure in RC flat plate substructures: A new perspective
https://orcid.org/0009-0006-8449-0669
Highlights Identify a new perspective on progressive collapse modes of RC flat plate structures induced by slab-column joint failure. Conduct an experimental test on an intact RC flat plate substructure specimen under an overloading scenario. Propose an analytical model for post-punching resistance of RC flat plate substructure. Compare punching and post-punching resistance and behaviour of the substructure due to joint failure and column failure.
Abstract Majority of progressive collapse incidents of concrete flat plate structures were caused by slab overloading in the form of punching shear failure at a slab-column joint, which exhibit distinctive resistance mechanism from those triggered by column losses. Relevant studies on the slab overloading scenario are scarce. To fill this gap in research and to broaden the perspective on different collapse modes, an experimental test was conducted on a 1/3-scale 2 × 2-bay flat plate substructure specimen by applying an increased downward uniform load on the slab, until the structure was completely damaged following the initial punching shear failure at the interior slab-column joint and was unable to take any further load. In addition, the flexural capacity of the specimen was evaluated using the yield line theory, and an analytical model was also proposed to estimate the post-punching peak load of the specimen. Finally, the experimental results obtained from this study were compared to those of a similar test under an interior column removal scenario. Comparisons indicate that the specimen under the slab overloading scenario displays better collapse resistance than that under the column removal scenario. Nevertheless, the residual resistant capacity of the overloaded specimen may not be adequate enough to prevent the collapse of the entire structure after the initial punching failure.
Progressive collapse mode induced by slab-column joint failure in RC flat plate substructures: A new perspective
https://orcid.org/0009-0006-8449-0669
Highlights Identify a new perspective on progressive collapse modes of RC flat plate structures induced by slab-column joint failure. Conduct an experimental test on an intact RC flat plate substructure specimen under an overloading scenario. Propose an analytical model for post-punching resistance of RC flat plate substructure. Compare punching and post-punching resistance and behaviour of the substructure due to joint failure and column failure.
Abstract Majority of progressive collapse incidents of concrete flat plate structures were caused by slab overloading in the form of punching shear failure at a slab-column joint, which exhibit distinctive resistance mechanism from those triggered by column losses. Relevant studies on the slab overloading scenario are scarce. To fill this gap in research and to broaden the perspective on different collapse modes, an experimental test was conducted on a 1/3-scale 2 × 2-bay flat plate substructure specimen by applying an increased downward uniform load on the slab, until the structure was completely damaged following the initial punching shear failure at the interior slab-column joint and was unable to take any further load. In addition, the flexural capacity of the specimen was evaluated using the yield line theory, and an analytical model was also proposed to estimate the post-punching peak load of the specimen. Finally, the experimental results obtained from this study were compared to those of a similar test under an interior column removal scenario. Comparisons indicate that the specimen under the slab overloading scenario displays better collapse resistance than that under the column removal scenario. Nevertheless, the residual resistant capacity of the overloaded specimen may not be adequate enough to prevent the collapse of the entire structure after the initial punching failure.
Progressive collapse mode induced by slab-column joint failure in RC flat plate substructures: A new perspective
https://orcid.org/0009-0006-8449-0669
Highlights Identify a new perspective on progressive collapse modes of RC flat plate structures induced by slab-column joint failure. Conduct an experimental test on an intact RC flat plate substructure specimen under an overloading scenario. Propose an analytical model for post-punching resistance of RC flat plate substructure. Compare punching and post-punching resistance and behaviour of the substructure due to joint failure and column failure.
Abstract Majority of progressive collapse incidents of concrete flat plate structures were caused by slab overloading in the form of punching shear failure at a slab-column joint, which exhibit distinctive resistance mechanism from those triggered by column losses. Relevant studies on the slab overloading scenario are scarce. To fill this gap in research and to broaden the perspective on different collapse modes, an experimental test was conducted on a 1/3-scale 2 × 2-bay flat plate substructure specimen by applying an increased downward uniform load on the slab, until the structure was completely damaged following the initial punching shear failure at the interior slab-column joint and was unable to take any further load. In addition, the flexural capacity of the specimen was evaluated using the yield line theory, and an analytical model was also proposed to estimate the post-punching peak load of the specimen. Finally, the experimental results obtained from this study were compared to those of a similar test under an interior column removal scenario. Comparisons indicate that the specimen under the slab overloading scenario displays better collapse resistance than that under the column removal scenario. Nevertheless, the residual resistant capacity of the overloaded specimen may not be adequate enough to prevent the collapse of the entire structure after the initial punching failure.
Progressive collapse mode induced by slab-column joint failure in RC flat plate substructures: A new perspective
Yang, Zhi (author) / Guo, Xuekang (author) / Li, Yi (author) / Guan, Hong (author) / Diao, Mengzhu (author) / Wang, Junkun (author) / Huang, Wenjun (author)
Engineering Structures ; 292
2023-06-17
Article (Journal)
Electronic Resource
English
| Elsevier | 2023
Numerical Simulation on Progressive Collapse Resistance of RC Beam-Slab-Column Substructures
| Springer Verlag | 2022