Nonlinear numerical simulation of punching shear behavior of reinforced concrete flat slabs with shear-heads
File(s)
Published version
Author(s)
Bompa, Dan V
Elghazouli, Ahmed Y
Type
Journal Article
Abstract
This paper examines the structural response of reinforced concrete flat slabs, provided with fully-embedded shear-heads, through detailed three-dimensional nonlinear numerical simulations and parametric assessments using concrete damage plasticity models. Validations of the adopted nonlinear finite element procedures are carried out against experimental results from three test series. After gaining confidence in the ability of the numerical models to predict closely the full inelastic response and failure modes, numerical investigations are carried out in order to examine the influence of key material and geometric parameters. The results of these numerical assessments enable the identification of three modes of failure as a function of the interaction between the shear-head and surrounding concrete. Based on the findings, coupled with results from previous studies, analytical models are proposed for predicting the rotational response as well as the ultimate strength of such slab systems. Practical recommendations are also provided for the design of shear-heads in RC slabs, including the embedment length and section size. The analytical expressions proposed in this paper, based on a wide-ranging parametric assessment, are shown to offer a more reliable design approach in comparison with existing methods for all types of shear-heads, and are suitable for direct practical application.
Date Issued
2020-04-01
Date Acceptance
2019-03-11
Citation
Frontiers of Structural and Civil Engineering, 2020, 14, pp.331-356
ISSN
2095-2449
Publisher
Springer Verlag
Start Page
331
End Page
356
Journal / Book Title
Frontiers of Structural and Civil Engineering
Volume
14
Copyright Statement
© 2020 The Author(s). This article is licensed under a Creative Commons
Attribution 4.0 International License, which permits use, sharing, adaptation,
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Commons licence and your intended use is not permitted by statutory
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To view a copy of this licence, visit http://creativecommons.org/licenses/
by/4.0/.
Attribution 4.0 International License, which permits use, sharing, adaptation,
distribution and reproduction in any medium or format, as long as you give
appropriate credit to the original author(s) and the source, provide a link to the
Creative Commons licence, and indicate if changes were made.
The images or other third party material in this article are included in the
article’s Creative Commons licence, unless indicated otherwise in a credit
line to the material. If material is not included in the article’s Creative
Commons licence and your intended use is not permitted by statutory
regulation or exceeds the permitted use, you will need to obtain permission
directly from the copyright holder.
To view a copy of this licence, visit http://creativecommons.org/licenses/
by/4.0/.
Identifier
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Subjects
Science & Technology
Technology
Engineering, Civil
Engineering
non-linear numerical modelling
concrete damage plasticity
RC flat slabs
shear-heads
punching shear
FINITE-ELEMENT-ANALYSIS
MESHFREE METHOD
CRACK-PROPAGATION
DAMAGE MODEL
STEEL
STRENGTH
FRACTURE
PLASTICITY
COMPOSITE
BEAM
Publication Status
Published
Date Publish Online
2020-03-14