Numerical Analyses of Hybrid‐Bonded FRP Strengthened Concrete Beams

: To overcome the problem of debonding, a new hybrid-bonded fiber-reinforced polymers (HB-FRP) strengthening system has recently been developed. This HB-FRP technique can increase the interfacial bond strength several folds. In this work, a finite element (FE) model for HB-FRP strengthened beams is developed to simulate the responses of the new structural system. The interfacial behaviors between the FRP and the concrete are simulated with a shear friction model. Comparisons between the predictions from this model and the test results demonstrate the accuracy of the FE model. The mechanism of the HB-FRP system and failure modes are then studied using the proposed model.

[1]  E. Thorenfeldt.  Mechanical properties of high-strength concrete and applications in design , 1987 .

[2]  Hyo-Gyoung Kwak,et al.  Implementation of bond-slip effect in analyses of RC frames under cyclic loads using layered section method , 2006 .

[3]  F. Vecchio,et al.  TOWARDS MODELING OF REINFORCED CONCRETE MEMBERS WITH EXTERNALLY BONDED FIBER-REINFORCED POLYMER COMPOSITES , 2003 .

[4]  G. Monti,et al.  FRP ADHESION IN UNCRACKED AND CRACKED CONCRETE ZONES , 2003 .

[5]  Wei He,et al.  A fracture energy based constitutive model for the analysis of reinforced concrete structures under cyclic loading , 2008 .

[6]  Yufei Wu,et al.  Hybrid Bonding of FRP to Reinforced Concrete Structures , 2008 .

[7]  Ronald A. Cook,et al.  BOND STRESS MODEL FOR DESIGN OF ADHESIVE ANCHORS , 1993 .

[8]  W. Brameshuber,et al.  Analytical evaluation of pull-out tests- : The inverse problem , 2006 .

[9]  Zhishen Wu,et al.  Fracturing behaviors of FRP-strengthened concrete structures , 2003 .

[10]  Zhishen Wu,et al.  Structural performances of short steel-fiber reinforced concrete beams with externally bonded FRP sheets , 2003 .

[11]  Richard N. White,et al.  Enhanced Contact Model for Shear Friction of Normal and High-Strength Concrete , 1999 .

[12]  Michael E. Kreger,et al.  INCREASING FLEXURAL CAPACITY OF REINFORCED CONCRETE BEAMS USING CARBON FIBER-REINFORCED POLYMER COMPOSITES , 2003 .

[13]  L. Bank,et al.  Flexural Strengthening of Reinforced Concrete Beams by Mechanically Attaching Fiber-Reinforced Polymer Strips , 2004 .

[14]  Claudio Mazzotti,et al.  A numerical model for FRP–concrete delamination , 2006 .

[15]  David W. Scott,et al.  Flexural Strengthening of Reinforced Concrete Beams Using Fasteners and Fiber-Reinforced Polymer Strips , 2001 .

[16]  A. Belarbi,et al.  Constitutive Laws of Concrete in Tension and Reinforcing Bars Stiffened By Concrete , 1994 .

[17]  Pietro G. Gambarova,et al.  Shear Response, Deformations, and Subgrade Stiffness of aDowel Bar Embedded in Concrete , 1992 .

[18]  Jorge Alfaiate,et al.  The influence of mode II fracture on concrete strengthened with CFRP , 2004 .

[19]  Alan H. Mattock,et al.  SHEAR FRICTION AND HIGH-STRENGTH CONCRETE , 2001 .

[20]  Wei He,et al.  A 2D total strain based constitutive model for predicting the behaviors of concrete structures , 2006 .

[21]  L. Hollaway,et al.  An experimental study of the influence of plate end anchorage of carbon fibre composite plates used to strengthen reinforced concrete beams , 1998 .

[22]  Z. Bažant.  Mechanics of Distributed Cracking , 1986 .

[23]  D. Proverbs,et al.  Finite element modelling of concrete cover separation failure in FRP plated RC beams , 2003 .

[24]  Joost Wairaven,et al.  Influence of Concrete Strength and Load History on the Shear Friction Capacity of Concrete Members , 1987 .

[25]  Scott T Smith,et al.  Shear-Bending Interaction in Debonding Failures of FRP-Plated RC Beams , 2003 .

[26]  Waiching Tang,et al.  Performance of FRP bonding systems under fatigue loading , 2008 .

[27]  C. S. Cai,et al.  Interface slip effect on bonded plate repairs of concrete beams , 2007 .

[28]  Jin-Guang Teng,et al.  Meso-scale finite element model for FRP sheets/plates bonded to concrete , 2005 .

[29]  Kasumassa Nakaba,et al.  BOND BEHAVIOR BETWEEN FIBER-REINFORCED POLYMER LAMINATES AND CONCRETE , 2001 .

[30]  Lawrence F. Kahn,et al.  Shear Friction Tests with High-Strength Concrete , 2002 .

[31]  C. Mazzotti,et al.  NON LINEAR BOND-SLIP LAW FOR FRP-CONCRETE INTERFACE , 2003 .

[32]  Hyo-Gyoung Kwak,et al.  Bond–slip behavior under monotonic uniaxial loads , 2001 .

[33]  T. P. Tassios,et al.  Shear Resistance of Connections Between Reinforced Concrete Linear Precast Elements , 1989 .