Volume 22, Issue 2 pp. 1205-1222

TECHNICAL PAPER

Numerical investigation of the punching shear capacity of unbonded post-tensioned concrete flat slabs

Rafael Sanabria Díaz,

Corresponding Author

Rafael Sanabria Díaz

[email protected]

orcid.org/0000-0002-6907-7159

School of Civil Engineering, University of Campinas, Campinas, São Paulo, Brazil

Correspondence

Rafael Sanabria Díaz, School of Civil Engineering, Architecture and Urban Design, University of Campinas, R. Saturnino de Brito, 224, Campinas 13083-889, São Paulo, Brazil.

Email: [email protected]

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Leandro Mouta Trautwein,

Leandro Mouta Trautwein

School of Civil Engineering, University of Campinas, Campinas, São Paulo, Brazil

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Luiz Carlos de Almeida,

Luiz Carlos de Almeida

School of Civil Engineering, University of Campinas, Campinas, São Paulo, Brazil

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Rafael Sanabria Díaz,

Corresponding Author

Rafael Sanabria Díaz

[email protected]

orcid.org/0000-0002-6907-7159

School of Civil Engineering, University of Campinas, Campinas, São Paulo, Brazil

Correspondence

Rafael Sanabria Díaz, School of Civil Engineering, Architecture and Urban Design, University of Campinas, R. Saturnino de Brito, 224, Campinas 13083-889, São Paulo, Brazil.

Email: [email protected]

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Leandro Mouta Trautwein,

Leandro Mouta Trautwein

School of Civil Engineering, University of Campinas, Campinas, São Paulo, Brazil

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Luiz Carlos de Almeida,

Luiz Carlos de Almeida

School of Civil Engineering, University of Campinas, Campinas, São Paulo, Brazil

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First published: 08 December 2020

https://doi.org/10.1002/suco.202000448

Citations: 8

Discussion on this paper must be submitted within two months of the print publication. The discussion will then be published in print, along with the authors’ closure, if any, approximately nine months after the print publication.

Funding information: Coordenação de Aperfeiçoamento de Pessoal de Nível Superior, Grant/Award Number: 88882.435128

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Abstract

This paper describes a numerical study of the punching shear resistance of unbonded post-tensioned slabs without shear reinforcement. This research aimed to develop a methodology for modeling unbonded tendons and numerically evaluate the prestressing effects on the punching shear capacity. To validate the modeling approach, a series of well documented experimental tests were simulated using the finite element software DIANA. The nonlinear analyses were performed using three-dimensional solid elements, incorporating the cracking behavior of concrete by the smeared crack approach. In addition, interface elements were included, providing bond-slip properties to simulate the friction between tendons and concrete. A good agreement was found between the numerical results and experimental data. Load capacity, cracks patterns, and the prestressing effects were accurately simulated. After the validation, a parametric study was conducted to analyze the influence of distribution, force and profile of prestressing tendons. Finally, the numerical results were compared with current design code provisions and the approach provided by the Critical Shear Crack Theory.

Open Research

DATA AVAILABILITY STATEMENT

Some or all data, models, or code that support the findings of this study are available from the corresponding author upon reasonable request.

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Volume22, Issue2

April 2021

Pages 1205-1222

Numerical investigation of the punching shear capacity of unbonded post-tensioned concrete flat slabs

Abstract

Open Research

DATA AVAILABILITY STATEMENT

REFERENCES

Citing Literature

References

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Numerical investigation of the punching shear capacity of unbonded post-tensioned concrete flat slabs

Abstract

Open Research

DATA AVAILABILITY STATEMENT

REFERENCES

Citing Literature

References

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