Numerical study of dynamic collapse resistance of an RC flat plate substructure under an interior column removal scenario

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Yang, Z
Guan, H
Li, Y
Lu, XZ
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2022
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Cape Town, South Africa

Abstract

In RC flat plate structures, slab-column joints play a key role in transferring the gravity load from the slabs to the columns due to the absence of beam elements. If one or more columns of a flat plate structure are damaged in an accidental event, the load redistribution process may trigger punching shear failures at the adjacent slab-column joints. Progressive collapse of a large portion of the structure, or even its entirety, is like to occur following punching failure propagations. Given that progressive collapse is a dynamic phenomenon, investigating the dynamic responses of the structure under sudden column removal scenarios are imperative. In this study, a high-fidelity numerical model is developed to simulate the dynamic behavior of a multi-panel flat plate substructure under a sudden removal of an interior column. The model is validated by three sequential experimental tests on the same substructure, by which the load responses of the interior column stub, the slab deflections and the crack patterns are verified. Based on the validated model, the dynamic load redistribution patterns of the three tests are evaluated. Two series of parametric studies are also conducted to investigate the influence of the load level on the slab overhangs and the load release speed on the slab deflections.

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Current Perspectives and New Directions in Mechanics, Modelling and Design of Structural Systems: Proceedings of The Eighth International Conference on Structural Engineering, Mechanics and Computation, 5-7 September 2022, Cape Town, South Africa

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This is an Accepted Manuscript of a book chapter published by CRC Press in Current Perspectives and New Directions in Mechanics, Modelling and Design of Structural Systems on 2 September 2022, available online: https://doi.org/10.1201/9781003348443. It is deposited under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives License (http://creativecommons.org/licenses/by-nc-nd/4.0/), which permits non-commercial re-use, distribution, and reproduction in any medium, provided the original work is properly cited, and is not altered, transformed, or built upon in any way.

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Structural engineering

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Yang, Z; Guan, H; Li, Y; Lu, XZ, Numerical study of dynamic collapse resistance of an RC flat plate substructure under an interior column removal scenario, Current Perspectives and New Directions in Mechanics, Modelling and Design of Structural Systems: Proceedings of The Eighth International Conference on Structural Engineering, Mechanics and Computation, 5-7 September 2022, Cape Town, South Africa, 2022, pp. 645-649