Journal ArticleDOI
Failure Mode Analyses of Reinforced Concrete Beams Strengthened in Flexure with Externally Bonded Fiber-Reinforced Polymers
TLDR
In this paper, a nonlinear RC beam element model with bond-slip between the concrete and the fiber-reinforced polymer plate is used to study how the failure mechanism of simply supported strength-ened RC beams is affected by the following parameters: plate length, plate width, plate stiffness, and loading type.Abstract:
As existing structures age or are required to meet the changing demands on our civil infrastructure, poststrengthening and retrofitting are inevitable. A relatively recent technique to strengthen reinforced concrete ~RC! beams in flexure uses fiber-reinforced polymer ~FRP! strips or sheets glued to the tension side of the beam. A number of researchers have reported that the failure mode of an FRP-strengthened RC beam can change from the desired ductile mode of an underreinforced beam to a brittle one. This paper analyzes the effects of this strengthening technique on the response and failure modes of a reference RC beam. A nonlinear RC beam element model with bond-slip between the concrete and the FRP plate is used to study how the failure mechanism of simply supported strength- ened RC beams is affected by the following parameters: plate length, plate width, plate stiffness, and loading type. The beam geometry is kept constant. The parametric studies confirm the experimentally observed results according to which the most commonly observed failure modes due to loss of composite actions are affected by the plate geometric and material properties. In addition, distributed loads ~difficult to apply in an experimental test! may not be as sensitive to plate debonding in the region of maximum bending moment as are beams subjected to point loads.read more
Citations
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Journal ArticleDOI
Progressive collapse behavior of steel fiber-reinforced rubberized concrete frames
Ibrahim M.H. Alshaikh,B.H. Abu Bakar,Emad A.H. Alwesabi,Aref A. Abadel,Hussam Alghamdi,Ali Altheeb,Rabin Tuladhar +6 more
TL;DR: In this paper , the efficiency of combining fine aggregate's (sand) partial replacements with waste crumb rubber (CR) and steel fiber (SF) has been investigated to enhance the RC frame's deformability and structural ductility.
Influence of frp width-to-spacing ratio on bond performance of externally bonded frp systems on one way concrete slabs
TL;DR: In this article, the effect of the transverse strain gradient in the CFRP and the edge effect on the debonding of reinforced concrete elements was investigated using concrete slab specimens having identical reinforcement ratios, strengthened with CFRP strips having different bf/s ratios.
Journal ArticleDOI
An Experimental Study on Enhancing Progressive Collapse Resistance Using a Steel Fiber–Reinforced Concrete Frame
Ibrahim M.H. Alshaikh,B.H. Abu Bakar,Emad A.H. Alwesabi,Aref A. Abadel,Hussam Alghamdi,Muhammad Wasim +5 more
TL;DR: In this article , the authors investigated the inclusion efficiency of straight microsteel fibers to improve the structural ductility and deformability of reinforced concrete frames to achieve progressive collapse resistance and found that an enhancement was observed in structural ductile (the increase ratio reached up to 26%), stimulated by incorporating steel fiber in the normal concrete.
Journal ArticleDOI
The effect of openings on the performance of self-compacting concrete with volcanic pumice powder and different steel fibers
Luis Vivanco,Yoon, Jihyeon +1 more
TL;DR: In this article , the impact of incorporating volcanic pumice powder (VPP), with different steel fibers on self-compacting concrete (SCC) beams' performance with a circular opening of a diameter of 20 mm at the centroid was investigated.
Dissertation
Strengthening of thin metallic cylindrical shells using fibre reinforced polymers
TL;DR: In this paper, the authors investigated the possible application of Fibre Reinf orced Polymer (FRP) as a new repair and strengthening technique to increase the buckling capacity of thin metallic cylindrical shells.
References
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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
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.
Journal ArticleDOI
Significance of midspan debonding failure in frp-plated concrete beams
TL;DR: In this paper, it is shown that mid-pan debond action is triggered by high shear stresses transmitted from the plates through the adhesive to the cover concrete and corrosion of the embedded steel.
Journal ArticleDOI
Behavioral trends of rc beams strengthened with externally bonded frp
TL;DR: The performance of conventionally reinforced concrete (RC) beams strengthened in flexure with externally bonded fiber-reinforced polymers (EB-FRP) was studied by compiling and analyzing an experimental database.
Journal ArticleDOI
Ultimate Response of RC Beams Strengthened with CFRP Plates
Paul Fanning,Oliver Kelly +1 more
TL;DR: In this article, the authors present the results of flexural tests on ten reinforced concrete beams strengthened with different plate configurations, and a strain compatibility and force equilibrium method of analysis, coupled with an empirical rule derived from the test data, is demonstrated to be effective in predicting the ultimate response of simply supported beams in bending with and without end plate anchorages and irrespective of plate length.
Journal ArticleDOI
Parametric Study of Beams with Externally Bonded FRP Reinforcement
Marco Arduini,Antoinio Nanni +1 more
TL;DR: In this paper, a parametric analysis is conducted to investigate the effects of FRP reinforcement on serviceability, strength, and failure mechanisms of repaired RC beams, and the results of the analysis are shown in terms of repaired-to-unrepaired strength and deflection ratios.
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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