Journal ArticleDOI
Experimental and nonlinear finite element studies of RC beams strengthened with FRP plates
TLDR
In this paper, the brittle failure modes of RC members strengthened in flexure by FRP plates are studied and the finite element analyses are based on nonlinear fracture mechanics, and the actual crack pattern observed in the tests by using a smeared and an interface crack model.Abstract:
This paper presents a joint experimental–analytical investigation aimed at studying the brittle failure modes of RC members strengthened in flexure by FRP plates. Both midspan and plate end failure modes are studied. The finite element analyses are based on nonlinear fracture mechanics. The model considered the actual crack pattern observed in the tests by using a smeared and an interface crack model. This paper shows how concrete cracking, adhesive behavior, plate length, width and stiffness affect the failure mechanisms. The numerical and experimental results show that debonding and concrete cover splitting failure modes occur always by crack propagation inside the concrete.read more
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Journal ArticleDOI
Flexural strengthening of concrete beams using CFRP, GFRP and hybrid FRP sheets
TL;DR: In this article, the efficiency of external strengthening systems for reinforced concrete beams using FRP fabric (Glass-Carbon) is examined. And an analytical model to predict the flexural failure of strengthened concrete elements is also developed.
Journal ArticleDOI
Finite-element modeling of intermediate crack debonding in FRP-plated RC beams
TL;DR: In this paper, an advanced finite element (FE) model based on the smeared-crack approach for predicting intermediate crack-induced debonding failure is presented, which is a common failure mode of RC beams strengthened with externally bonded fiber-reinforced polymer (FRP) reinforcement.
Journal ArticleDOI
Finite element modeling of debonding failures in FRP-strengthened RC beams
TL;DR: Numerical results are presented to show that an appropriate dynamic approach effectively overcomes the convergence problem and provides accurate predictions of test results.
Journal ArticleDOI
Finite element analysis of end cover separation in RC beams strengthened in flexure with FRP
Shi Shun Zhang,Jinguang Teng +1 more
TL;DR: In this article, a finite element approach for predicting end cover separation failures in reinforced concrete (RC) beams strengthened in flexure with either externally-bonded or near-surface mounted FRP reinforcement is presented.
Journal ArticleDOI
Nonlinear 3D finite element modeling of RC beams strengthened with prestressed NSM-CFRP strips
Hamid Y. Omran,Raafat El-Hacha +1 more
TL;DR: In this article, a 3D nonlinear finite element (FE) analysis of reinforced concrete (RC) beams strengthened with prestressed Near-Surface Mounted (NSM) Carbon Fiber Reinforced Polymer (CFRP) strips is presented, where debonding effect at the epoxy-concrete interface is considered in the model by identification of fracture energies of the interfaces and appropriate bilinear shear stress-slip and tension stress gap models.
References
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Analysis of crack formation and crack growth in concrete by means of fracture mechanics and finite elements
TL;DR: In this article, fracture mechanics is introduced into finite element analysis by means of a model where stresses are assumed to act across a crack as long as it is narrowly opened, which may be regarded as a way of expressing the energy adsorption in the energy balance approach.
Journal ArticleDOI
Analysis of crack formation and crack growth in concrete by means of fracture mechanics and finite elements
TL;DR: In this article, fracture mechanics is introduced into finite element analysis by means of a model where stresses are assumed to act across a crack as long as it is narrowly opened, which may be regarded as a way of expressing the energy adsorption in the energy balance approach.
Guide for the Design and Construction of Externally Bonded FRP Systems for Strengthening Concrete Structures
Charles E. Bakis,Damian I. Kachlakev,Morris Schupack,P. N. Balaguru,Duane J. Gee,Vistasp M. Karbhari,David Scott,Craig A. Ballinger,T. Russell Gentry,Howard S. Kliger,Rajan Sen,Lawrence C. Bank,Arie Gerritse,James G. Korff,Mohsen Shahawy,Karl Gillette,Michael W. Lee,Carol K. Shield,Brahim Benmokrane,William J. Gold,Ibrahim M. Mahfouz,Khaled Soudki,Gregg J. Blaszak,Charles H. Goodspeed,Henry N. Marsh,R. Taerwe,Gordon L. Brown,F. Grace,Orange S. Marshall,Vicki L. Brown,Mark F. Green,Houssam Toutanji,Thomas I. Campbell,Mark E. Greenwood,Ayman Mosallam,Taketo Uomoto,Charles W. Dolan,Doug D. Gremel,Antoine E. Naaman,Miroslav Vadovic,Michael S. Guglielmo,Antonio Nanni,David R. Vanderpool,Rami M. Elhassan,Issam E. Harik,Kenneth W. Neale,Milan Vatovec,Salem S. Faza,Mark P. Henderson,Stephanie L. Walkup,Edward R. Fyfe,Bohdan N. Horeczko,Max L. Porter,David White,David M. Gale,Srinivasa L. Iyer,Sami H. Rizkalla,John P. Busel +57 more
TL;DR: The Emerging Technology Series as mentioned in this paper is a series of information and recommendations based on available test data, technical reports, limited experience with field applications, and the opinions of committee members, with a focus on the development and appropriate use of new and emerging technologies.
Book
Design of Concrete Structures
TL;DR: In this paper, the authors propose a yield analysis for edge-supported slabs and two-way column supported slabs, and a strip method for slabs in gradients.
Proceedings ArticleDOI
Guide for the Design and Construction of Externally Bonded FRP Systems for Strengthening Concrete Structures (ACI 440.2R-02)
K. Soudki,T. Alkhrdaji +1 more
TL;DR: In this article, the authors report on the key features of the "Guiding and Construction of Externally Bonded FRP Systems for Strengthening Concrete Structures" issued by the American Concrete Institute (ACI).
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Guide for the Design and Construction of Externally Bonded FRP Systems for Strengthening Concrete Structures
Charles E. Bakis,Damian I. Kachlakev,Morris Schupack,P. N. Balaguru,Duane J. Gee,Vistasp M. Karbhari,David Scott,Craig A. Ballinger,T. Russell Gentry,Howard S. Kliger,Rajan Sen,Lawrence C. Bank,Arie Gerritse,James G. Korff,Mohsen Shahawy,Karl Gillette,Michael W. Lee,Carol K. Shield,Brahim Benmokrane,William J. Gold,Ibrahim M. Mahfouz,Khaled Soudki,Gregg J. Blaszak,Charles H. Goodspeed,Henry N. Marsh,R. Taerwe,Gordon L. Brown,F. Grace,Orange S. Marshall,Vicki L. Brown,Mark F. Green,Houssam Toutanji,Thomas I. Campbell,Mark E. Greenwood,Ayman Mosallam,Taketo Uomoto,Charles W. Dolan,Doug D. Gremel,Antoine E. Naaman,Miroslav Vadovic,Michael S. Guglielmo,Antonio Nanni,David R. Vanderpool,Rami M. Elhassan,Issam E. Harik,Kenneth W. Neale,Milan Vatovec,Salem S. Faza,Mark P. Henderson,Stephanie L. Walkup,Edward R. Fyfe,Bohdan N. Horeczko,Max L. Porter,David White,David M. Gale,Srinivasa L. Iyer,Sami H. Rizkalla,John P. Busel +57 more