Experimental investigation of the CFRP Anchorage System used for CFRP Sheet In Strengthening of R.C rectangular columns under axial static loading

  Ramadan Mohmed Aly Awad,  Abd El-Rahman Megahid Ahmed,  Omar Ahmed Farghal

ABSTRACT: This paper investigates the suitability and effectiveness of the CFRP anchorage system in increasing the bond between the CFRP sheet strengthening the deferral of the reinforced concrete column rectangular cross-sections of specimens to decrease the effect of aspect ratio effect. The CFRP anchorage can transfer the stresses from the corner of the mid-face and based on the embedment depth it reaches it can transfer them in the confined area of the section .For this purpose, a detailed experimental program was conducted, which is presented here briefly. Anchoring systems are discussed herein tree gropes (E,F and G) with 15 rectangular columns cross-sections. The results of the experimental observations are discussed in the form of the stress-strain curve, ultimate bearing capacity, ductility, strain ductility , toughness , strain energy absorption capacity and failure modes. The test result, in general indicates that the use of CFRP anchor provides an enhancement in the overall ultimate bearing capacity of strengthening specimen. Three groups include 15 R.c concrete columns with composite jackets have been tested under axial compression .Test Results showed a significant increase in strength , ductility and toughness of column cross-sections due to CFRP anchorage system and confinement by CFRP .It was found that also CFRP anchorage and confinement increase the RC column compressive strength , strain in the lateral direction , and axial strain. CFRP jackets and anchorage prevent premature failure of concrete cover and buckling outwards of steel bars, leading to a ductile failure significantly improved performance of CFRP confinement concrete column rectangular cross-sections.

Keywords- CFRP Anchorage System, Confinement, FRP jackets, Ductility , Toughness .

Unique Identification Number - IJEDR1902107
Page Number(s) - 569-577
Pubished in - Volume 7 | Issue 2 | June 2019
DOI (Digital Object Identifier) -   
Publisher - IJEDR (ISSN - 2321-9939)

  Ramadan Mohmed Aly Awad,  Abd El-Rahman Megahid Ahmed,  Omar Ahmed Farghal,   "Experimental investigation of the CFRP Anchorage System used for CFRP Sheet In Strengthening of R.C rectangular columns under axial static loading", International Journal of Engineering Development and Research (IJEDR), ISSN:2321-9939, Volume.7, Issue 2, pp.569-577, June 2019, Available at :http://www.ijedr.org/papers/IJEDR1902107.pdf