Finite element parametric study of reinforced concrete beams shear-strengthened with embedded FRP bars

Michael Qapo; Samir Dirar; Yaser Jemaa

doi:10.1016/j.compstruct.2016.04.017

Finite element parametric study of reinforced concrete beams shear-strengthened with embedded FRP bars

Michael Qapo, Samir Dirar, Yaser Jemaa

Civil Engineering

Research output: Contribution to journal › Article › peer-review

17 Citations (Scopus)

648 Downloads (Pure)

Abstract

The deep embedment (DE) of fibre-reinforced polymer (FRP) bars is a promising shear-strengthening scheme for existing concrete structures. In the current study, a three-dimensional nonlinear finite element (FE) model for DE-strengthened reinforced concrete beams was developed and validated. The FE and Concrete Society TR55 predictions were compared with published experimental results. The FE-predicted/experimental shear strength enhancement ratio is 1.08 with a standard deviation of 0.25 whereas the TR55-predicted/experimental shear strength enhancement ratio is 1.57 with a standard deviation of 0.54. A numerical parametric study was carried out. The results showed that the predicted shear strength enhancement was positively influenced by the use of inclined DE FRP bars and the increase in concrete compressive strength but decreased with the increase in shear span-to-effective depth ratio and internal steel stirrup-to-DE FRP bar ratio. The predicted percentage of shear strength enhancement was not significantly influenced by size effect.

Original language	English
Pages (from-to)	93-105
Journal	Composite Structures
Volume	149
Early online date	7 Apr 2016
DOIs	https://doi.org/10.1016/j.compstruct.2016.04.017
Publication status	Published - 1 Aug 2016

Keywords

Deep embedment technique
Fibre reinforced polymer
Finite element
Reinforced concrete beam
Shear
Strengthening

Access to Document

10.1016/j.compstruct.2016.04.017

Finite element parametric study of reinforced concrete beams shear-strengthened with embedded FRP bars - revised
Checked April 2016
Accepted author manuscript, 1.1 MBLicence: Creative Commons: Attribution-NonCommercial-NoDerivs (CC BY-NC-ND)

17 Citations
9 Article
2 Paper
1 Conference contribution

Effect of transverse and longitudinal reinforcement ratios on the behaviour of RC T-beams shear-strengthened with embedded FRP bars
Sogut, K., Dirar, S., Theofanous, M., Faramarzi, A. & Nayak, A. N., 15 Apr 2021, In: Composite Structures. 262, 113622.
Research output: Contribution to journal › Article › peer-review

Open Access
File
163 Downloads (Pure)
Efficient shear retrofitting of reinforced concrete beams using prestressed deep embedded bars
Bhanugoban, M., Yapa, H. & Dirar, S., 1 Nov 2021, In: Engineering Structures. 246, 14 p., 113053.
Research output: Contribution to journal › Article › peer-review

Open Access
File
85 Downloads (Pure)
Experimental behavior and design of reinforced concrete exterior beam-column joints strengthened with embedded bars
Rahman, R., Dirar, S., Jemaa, Y., Theofanous, M. & Elshafie, M., 28 Aug 2018, (E-pub ahead of print) In: Journal of Composites for Construction. 22, 6
Research output: Contribution to journal › Article › peer-review

Open Access
File
7 Citations (Scopus)

350 Downloads (Pure)
Bond performance of Deep Embedment FRP bars epoxy-bonded into concrete
Caro, M., Jemaa, Y., Dirar, S. & Quinn, A., 8 May 2017, In: Engineering Structures.
Research output: Contribution to journal › Article › peer-review

Open Access
File
CFRP shear strengthening of reinforced-concrete T-beams with corroded shear links
Qin, S., Dirar, S., Yang, J., Chan, A. & Elshafie, M., Oct 2015, In: Journal of Composites for Construction. 19, 5, 10 p., 04014081.
Research output: Contribution to journal › Article › peer-review

Open Access
File
23 Citations (Scopus)

348 Downloads (Pure)
Deep embedment strengthening of full-scale shear-deficient reinforced concrete beams
Jemaa, Y., Jones, C. & Dirar, S., Dec 2015, Proceedings of the 12th International Symposium on Fiber Reinforced Polymers for Reinforced Concrete Structures (FRPRCS-12) and The 5th Asia-Pacific Conference on Fiber Reinforced Polymers in Structures (APFIS-2015) Joint Conference. Wu, Z., Wu, G. & Wang, X. (eds.). Southeast University, 6 p. P-091
Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Open Access
File
Nonlinear finite element modelling and parametric study of CFRP shear-strengthened prestressed concrete girders
Qapo, M., Dirar, S., Yang, J. & Elshafie, M., 1 Feb 2015, In: Construction and Building Materials. 76, p. 245-255 11 p.
Research output: Contribution to journal › Article › peer-review

File
10 Citations (Scopus)

436 Downloads (Pure)

1 Finished

Implications of the embedded through-section technique for improving the resilience and sustainability of existing reinforced concrete infrastructure
Dirar, S.
Engineering & Physical Science Research Council
1/04/14 → 31/03/16
Project: Research Councils

Cite this

@article{6a9804145a03490ab7b44fab77dd3cf5,

title = "Finite element parametric study of reinforced concrete beams shear-strengthened with embedded FRP bars",

abstract = "The deep embedment (DE) of fibre-reinforced polymer (FRP) bars is a promising shear-strengthening scheme for existing concrete structures. In the current study, a three-dimensional nonlinear finite element (FE) model for DE-strengthened reinforced concrete beams was developed and validated. The FE and Concrete Society TR55 predictions were compared with published experimental results. The FE-predicted/experimental shear strength enhancement ratio is 1.08 with a standard deviation of 0.25 whereas the TR55-predicted/experimental shear strength enhancement ratio is 1.57 with a standard deviation of 0.54. A numerical parametric study was carried out. The results showed that the predicted shear strength enhancement was positively influenced by the use of inclined DE FRP bars and the increase in concrete compressive strength but decreased with the increase in shear span-to-effective depth ratio and internal steel stirrup-to-DE FRP bar ratio. The predicted percentage of shear strength enhancement was not significantly influenced by size effect.",

keywords = "Deep embedment technique, Fibre reinforced polymer, Finite element, Reinforced concrete beam, Shear, Strengthening",

author = "Michael Qapo and Samir Dirar and Yaser Jemaa",

year = "2016",

month = aug,

day = "1",

doi = "10.1016/j.compstruct.2016.04.017",

language = "English",

volume = "149",

pages = "93--105",

journal = "Composite Structures",

issn = "0263-8223",

publisher = "Elsevier",

}

TY - JOUR

T1 - Finite element parametric study of reinforced concrete beams shear-strengthened with embedded FRP bars

AU - Qapo, Michael

AU - Dirar, Samir

AU - Jemaa, Yaser

PY - 2016/8/1

Y1 - 2016/8/1

N2 - The deep embedment (DE) of fibre-reinforced polymer (FRP) bars is a promising shear-strengthening scheme for existing concrete structures. In the current study, a three-dimensional nonlinear finite element (FE) model for DE-strengthened reinforced concrete beams was developed and validated. The FE and Concrete Society TR55 predictions were compared with published experimental results. The FE-predicted/experimental shear strength enhancement ratio is 1.08 with a standard deviation of 0.25 whereas the TR55-predicted/experimental shear strength enhancement ratio is 1.57 with a standard deviation of 0.54. A numerical parametric study was carried out. The results showed that the predicted shear strength enhancement was positively influenced by the use of inclined DE FRP bars and the increase in concrete compressive strength but decreased with the increase in shear span-to-effective depth ratio and internal steel stirrup-to-DE FRP bar ratio. The predicted percentage of shear strength enhancement was not significantly influenced by size effect.

AB - The deep embedment (DE) of fibre-reinforced polymer (FRP) bars is a promising shear-strengthening scheme for existing concrete structures. In the current study, a three-dimensional nonlinear finite element (FE) model for DE-strengthened reinforced concrete beams was developed and validated. The FE and Concrete Society TR55 predictions were compared with published experimental results. The FE-predicted/experimental shear strength enhancement ratio is 1.08 with a standard deviation of 0.25 whereas the TR55-predicted/experimental shear strength enhancement ratio is 1.57 with a standard deviation of 0.54. A numerical parametric study was carried out. The results showed that the predicted shear strength enhancement was positively influenced by the use of inclined DE FRP bars and the increase in concrete compressive strength but decreased with the increase in shear span-to-effective depth ratio and internal steel stirrup-to-DE FRP bar ratio. The predicted percentage of shear strength enhancement was not significantly influenced by size effect.

KW - Deep embedment technique

KW - Fibre reinforced polymer

KW - Finite element

KW - Reinforced concrete beam

KW - Shear

KW - Strengthening

UR - http://www.sciencedirect.com/science/article/pii/S0263822316302562

U2 - 10.1016/j.compstruct.2016.04.017

DO - 10.1016/j.compstruct.2016.04.017

M3 - Article

SN - 0263-8223

VL - 149

SP - 93

EP - 105

JO - Composite Structures

JF - Composite Structures

ER -

Finite element parametric study of reinforced concrete beams shear-strengthened with embedded FRP bars

Abstract

Keywords

Access to Document

Fingerprint

Research output

Projects

Cite this