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Experimental study on the progressive collapse behaviour of RC flat plate substructures subjected to corner column removal scenarios.

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Title: Experimental study on the progressive collapse behaviour of RC flat plate substructures subjected to corner column removal scenarios.
Authors: Ma, Fuhao1 fuhao.ma@griffithuni.edu.au, Gilbert, Benoit P.1, Guan, Hong1 h.guan@griffith.edu.au, Xue, Huizhong1, Lu, Xinzheng1, Li, Yi1
Source: Engineering Structures. Feb2019, Vol. 180, p728-741. 14p.
Subjects: Structural plates, Physics experiments, Concrete slabs, Flexural strength testing, Structural engineering
Abstract: Highlights • The load resisting mechanisms and failure modes noticeably varied between different corner reinforcement configurations. • The applied load was mainly transferred to edge columns adjacent to the removed corner column. • The risk of progressive collapse can be reduced with the existence of overhangs surrounding a removed corner column. • Yield line theory can be used to estimate the slab flexural capacities under corner column removal scenarios in this study. Abstract Reinforced concrete (RC) flat plate structures are broadly used in car parks, residential and office buildings due to their economic and architectural advantages. However, this structural system is inherently prone to punching shear failure, which may propagate horizontally and vertically, ultimately leading to the progressive collapse of the entire structure or of a large portion of it. This paper presents the experimental results from two quasi-static large-displacement tests performed on a 1/3 scale, 2 × 2-bay, RC flat plate substructure subjected to corner column removal scenarios. The specimen was tested twice with different corner reinforcement configurations: (i) firstly, one corner column, with torsional strips, was removed and the Uniformly Distributed Load (UDL) on the bay adjacent to the removed column was increased to failure (Test T1), and (ii) secondly, as the damage was concentrated in the vicinity of removed corner column in (i), the corner column diagonally opposite to the first removed one, without torsional strips, was removed. The UDL on the bay adjacent to the second removed column was also increased to failure (Test T2). Different failure and post-failure behaviours, failure modes, and collapse resisting mechanisms between the two tests were witnessed, presented and analysed. Results show that 80% to 110% of the applied load is transferred to the two edge columns adjacent to the removed corner column throughout the entire two tests. The ultimate load carrying capacity for T1 is found to be 1.7 times smaller than the one for T2. [ABSTRACT FROM AUTHOR]
Copyright of Engineering Structures is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: Experimental study on the progressive collapse behaviour of RC flat plate substructures subjected to corner column removal scenarios.
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  Data: <searchLink fieldCode="AR" term="%22Ma%2C+Fuhao%22">Ma, Fuhao</searchLink><relatesTo>1</relatesTo><i> fuhao.ma@griffithuni.edu.au</i><br /><searchLink fieldCode="AR" term="%22Gilbert%2C+Benoit+P%2E%22">Gilbert, Benoit P.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Guan%2C+Hong%22">Guan, Hong</searchLink><relatesTo>1</relatesTo><i> h.guan@griffith.edu.au</i><br /><searchLink fieldCode="AR" term="%22Xue%2C+Huizhong%22">Xue, Huizhong</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Lu%2C+Xinzheng%22">Lu, Xinzheng</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Li%2C+Yi%22">Li, Yi</searchLink><relatesTo>1</relatesTo>
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  Data: <searchLink fieldCode="JN" term="%22Engineering+Structures%22">Engineering Structures</searchLink>. Feb2019, Vol. 180, p728-741. 14p.
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  Data: <searchLink fieldCode="DE" term="%22Structural+plates%22">Structural plates</searchLink><br /><searchLink fieldCode="DE" term="%22Physics+experiments%22">Physics experiments</searchLink><br /><searchLink fieldCode="DE" term="%22Concrete+slabs%22">Concrete slabs</searchLink><br /><searchLink fieldCode="DE" term="%22Flexural+strength+testing%22">Flexural strength testing</searchLink><br /><searchLink fieldCode="DE" term="%22Structural+engineering%22">Structural engineering</searchLink>
– Name: Abstract
  Label: Abstract
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  Data: Highlights • The load resisting mechanisms and failure modes noticeably varied between different corner reinforcement configurations. • The applied load was mainly transferred to edge columns adjacent to the removed corner column. • The risk of progressive collapse can be reduced with the existence of overhangs surrounding a removed corner column. • Yield line theory can be used to estimate the slab flexural capacities under corner column removal scenarios in this study. Abstract Reinforced concrete (RC) flat plate structures are broadly used in car parks, residential and office buildings due to their economic and architectural advantages. However, this structural system is inherently prone to punching shear failure, which may propagate horizontally and vertically, ultimately leading to the progressive collapse of the entire structure or of a large portion of it. This paper presents the experimental results from two quasi-static large-displacement tests performed on a 1/3 scale, 2 × 2-bay, RC flat plate substructure subjected to corner column removal scenarios. The specimen was tested twice with different corner reinforcement configurations: (i) firstly, one corner column, with torsional strips, was removed and the Uniformly Distributed Load (UDL) on the bay adjacent to the removed column was increased to failure (Test T1), and (ii) secondly, as the damage was concentrated in the vicinity of removed corner column in (i), the corner column diagonally opposite to the first removed one, without torsional strips, was removed. The UDL on the bay adjacent to the second removed column was also increased to failure (Test T2). Different failure and post-failure behaviours, failure modes, and collapse resisting mechanisms between the two tests were witnessed, presented and analysed. Results show that 80% to 110% of the applied load is transferred to the two edge columns adjacent to the removed corner column throughout the entire two tests. The ultimate load carrying capacity for T1 is found to be 1.7 times smaller than the one for T2. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Engineering Structures is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1016/j.engstruct.2018.11.043
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        Text: English
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        PageCount: 14
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      – SubjectFull: Physics experiments
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      – SubjectFull: Concrete slabs
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      – SubjectFull: Flexural strength testing
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      – TitleFull: Experimental study on the progressive collapse behaviour of RC flat plate substructures subjected to corner column removal scenarios.
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              Text: Feb2019
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