An experimental study on shear strengthening of RC T-section beams with CFRP plates subjected to cyclic load

The aim of this experimental study was to investigate the behaviour of reinforced concrete (RC) T-section beams that were strengthened by carbon fibre reinforced polymer (CFRP) plates. Six specimens, one of which was the control specimen and five of which were the shear deficient test specimens, were strengthened with side-bonded and ⍽-jacketed CFRP plates. Unidirectional and bidirectional CFRP sheets were used as strengthening material. Distinct CFRP type, CFRP arrangement, number of sheet layers and wrapping schemes were the variables that were investigated during the experimental programme. The main objective of the study was to obtain ductile flexural behaviour from the shear deficient RC T-section beams. Debonding reduces the strengthening potential of the externally bonded CFRP thus obstructs structures to meet the expected requirement from strengthening materials. To block debonding, mechanical anchorages were used at the end regions of CFRP plates. Test results confirmed that all performance CFRP ...

[1]  Alex Li,et al.  CRFP contribution to shear capacity of strengthened RC beams , 2001 .

[2]  J. W. Tedesco,et al.  PREDICTION OF ANCHORAGE FAILURE FOR REINFORCED CONCRETE BEAMS STRENGTHENED WITH FIBER-REINFORCED POLYMER PLATES , 2001 .

[3]  A. Nanni,et al.  Rehabilitation of rectangular simply supported RC beams with shear deficiencies using CFRP composites , 2002 .

[4]  A. Nanni,et al.  Behavior of Precracked RC Beams Strengthened with Carbon FRP Sheets , 1997 .

[5]  Mohammed H. Baluch,et al.  STRENGTHENING OF SHEAR-DAMAGED RC BEAMS BY EXTERNAL BONDING OF STEEL PLATES , 1995 .

[6]  Abdelhamid Charif,et al.  Structural behaviour of reinforced concrete beams strengthened by epoxy bonded steel plates. , 1983 .

[7]  D. Kachlakev,et al.  Behavior of full-scale reinforced concrete beams retrofitted for shear and flexural with FRP laminates , 2000 .

[8]  H. Saadatmanesh,et al.  Shear and Flexural Strengthening of R/C Beams with Carbon Fiber Sheets , 1997 .

[9]  A. Nanni,et al.  IMPROVING SHEAR CAPACITY OF EXISTING RC T-SECTION BEAMS USING CFRP COMPOSITES , 2000 .

[10]  D. Mertz,et al.  Shear Strengthening of Reinforced Concrete Beams Using Externally Applied Composite Fabrics , 1995 .

[11]  T. Tanaka,et al.  SHEAR REINFORCING EFFECT OF CARBON FIBER SHEET ATTACHED TO SIDE OF REINFORCED CONCRETE BEAMS , 1996 .

[12]  J D Shave,et al.  Design guidance for strengthening concrete structures using fibre composite materials:report of a Concrete Society Working Party , 2012 .

[13]  R. N. Swamy,et al.  STRENGTHENING FOR SHEAR OF RC BEAMS BY EXTERNAL PLATE BONDING , 1999 .

[14]  T. Triantafillou.  Shear Strengthening of Reinforced Concrete Beams Using Epoxy-Bonded FRP Composites , 1998 .

[15]  S. Altin,et al.  The Effects of CFRP Strips for Improving Shear Capacity of RC Beams , 2008 .

[16]  B. Täljsten.  STRENGTHENING CONCRETE BEAMS FOR SHEAR WITH CFRP SHEETS , 2003 .

[17]  Mohammed H. Baluch,et al.  Shear strength of plated RC beams , 1995 .

[18]  H. Gangarao,et al.  BENDING BEHAVIOR OF CONCRETE BEAMS WRAPPED WITH CARBON FABRIC , 1998 .