IJETSI

Title: EXPERIMENTAL AND THEORETICAL STUDY FOR SOLID AND BOXSECTION CONCRETE BEAMS STRENGTHENED WITH CFRP LAMINATES UNDER PURE TORSIONAL LOADS
Authors: Dr. Ali Hadi Adheem
\|\| \|\|
Civil Techniques Department, Karbala Technical Institute, Al-Furat Al-Awsat Technical University, Iraq
MLA 8 Adheem, Dr. Ali H. "EXPERIMENTAL AND THEORETICAL STUDY FOR SOLID AND BOXSECTION CONCRETE BEAMS STRENGTHENED WITH CFRP LAMINATES UNDER PURE TORSIONAL LOADS." IJETSI, vol. 2, no. 2, 2017, pp. 604-618, ijetsi.org/more2017.php?id=51. APA Adheem, D. H. (2017). EXPERIMENTAL AND THEORETICAL STUDY FOR SOLID AND BOXSECTION CONCRETE BEAMS STRENGTHENED WITH CFRP LAMINATES UNDER PURE TORSIONAL LOADS. IJETSI, 2(2), 604-618. Retrieved from http://ijetsi.org/more2017.php?id=51 Chicago Adheem, Dr. Ali H. "EXPERIMENTAL AND THEORETICAL STUDY FOR SOLID AND BOXSECTION CONCRETE BEAMS STRENGTHENED WITH CFRP LAMINATES UNDER PURE TORSIONAL LOADS." IJETSI 2, no. 2 (2017), 604-618. http://ijetsi.org/more2017.php?id=51.
References References [1]. Li LJ, Guo YC, Liu F, Bungey JH. “An experimental and numerical study of the effect of thickness and length of CFRP on performance of repaired reinforced concrete beams", Constr Build Mater 2006;20(10): 901-9. [2]. Triantafillou TC. "Shear strengthening of reinforced concrete beams using epoxy-bonded FRP composites", ACI Struct J 1998;95(2):107-15. [3]. Constantin E. Chalioris 'Torsional strengthening of rectangular and flanged beams using carbon fibre-reinforcedpolymers - Experimental study", Construction and Building Materials 22 (2008) 21-29. Available online at www.sciencedirect.com [4]. Ghobarab A, Ghorbel MN, Chidiac SE. "Upgrading torsional resistance of reinforced concrete beams using fiberreinforced polymer", J Compos Constr ASCE 2002; 6(4):257-63. [5]. Salom PR, Gergely JM, and Young DT "Torsional strengthening of spandrel beams with fiber-reinforced polymer laminates" J Compos Constr ASCE 2004; 8(2):157-62. [ 6]. De Lorenzis L, Nanni A. "Shear strengthening of reinforced concrete beams with NSM fiber-reinforced polymer rods", ACI Struct. J 2001; 98(1):60-8. [ 7]. Iraqi Specification, No. 5/1984, "Cement Portland" [8]. Iraqi Specification, No. 45/1984, "Aggregate from Natural Sources for,"Construction and Concrete ? [9]. "ANSYS Manual", Version 14.5, U.S.A., 2004. [ 10]. American Concrete Institute, ACI Committee 318, (2005), "Building Code Requirements for Structural Concrete (ACI 318-05) and Commentary (ACI 318R-05)", American Concrete Institute, Farmington Hills, MI. [11]. Gere, I.M. and Timoshenko, S.P., (1997), "Mechanics of material", PWS Publishing Company, Boston, Massachusetts. [12]. Kachlakev Damian and Thomas Miller, "Finite element modeling of reinforced concrete structures strengthened with FRP laminates", Technical Report, Oregon Department of Transportation, pp.99, May (2001). [13]. Wylie J. C., "Experimental Testing of Unreinforced Masonry Walls Strengthened with Orthogonal Near-Surface Mounted CFRP Subjected to Out-of-Plane Loading", M.Sc. Thesis, University of North Carolina (2009).
Abstract: The present experimental and theoretical investigation deals with the torsional strengthening of solid and box section plain concrete beams using epoxy-bonded CFRP strips. Also, compares the effectiveness and efficiency of two strengthening techniques viz. FRP bars as NSM reinforcement and CFRP strips as external reinforcement. Plain concrete beam strengthened with CFRP strips as transverse and longitudinal reinforcement were tested under pure torsion. For this analysis, a system of computer program (ANSYS V.14.5) is used for this study. The concrete beam was modeled by 8-node isoparametric brick elements. The CFRP strips were modeled by shell elements. The interface elements were modeled by contact element to represent slip and uplift separation between the concrete beams and CFRP-reinforcement. The results showed that the torsional capacity of the strengthened beams can be increased by either decreasing the spacing of the CFRP, or replacing of CFRP strips by NSM FRP.

IJETSI is Member of