Nonlinear finite element analysis of reinforced concrete beams strengthened by fiber-reinforced plastics

Abstract Numerical analyses are performed using the ABAQUS finite element program to predict the ultimate loading capacity of rectangular reinforced concrete beams strengthened by fiber-reinforced plastics applied at the bottom or on both sides of these beams. Nonlinear material behavior, as it relates to steel reinforcing bars, plain concrete, and fiber-reinforced plastics is simulated using appropriate constitutive models. The influences of fiber orientation, beam length and reinforcement ratios on the ultimate strength of the beams are investigated. It has been shown that the use of fiber-reinforced plastics can significantly increase the stiffnesses as well as the ultimate strengths of reinforced concrete beams. In addition, with the same fiber-reinforced plastics layer numbers, the ultimate strengths of beams strengthened by fiber-reinforced plastics at the bottom of the beams are much higher than those strengthened by fiber-reinforced plastics on both sides of the beams.

[1]  H. S. Morgan,et al.  Analysis of Nonlinear Stress-Strain Behavior of Fiber-Reinf orced Composite Materials , 1977 .

[2]  William C. Schnobrich,et al.  NONLINEAR ANALYSIS OF CRACKED REINFORCED CONCRETE , 1990 .

[3]  C. Meyer,et al.  Finite Element Analysis of Reinforced Concrete Structures , 1986 .

[4]  Shankar Mall,et al.  INVESTIGATION OF A CRACKED THICK ALUMINUM PANEL REPAIRED WITH A BONDED COMPOSITE PATCH , 1999 .

[5]  Philip A. Ritchie,et al.  External Reinforcement of Concrete Beams Using Fiber Reinforced Plastics , 1991 .

[6]  G. C. Sih,et al.  Failure mechanics of composites , 1985 .

[7]  Wai-Fah Chen.  Plasticity in reinforced concrete , 1982 .

[8]  Richard E. Chambers.  ASCE Design Standard for Pultruded Fiber-Reinforced-Plastic (FRP) Structures , 1997 .

[9]  Hsuan-Teh Hu,et al.  Nonlinear Analysis of Fiber-Reinforced Composite Laminates Subjected to Uniaxial Tensile Load , 2002 .

[10]  G. J. Al-Sulaimani,et al.  Strengthening of Initially Loaded Reinforced Concrete Beams Using FRP Plates , 1994 .

[11]  Kurt H. Gerstle,et al.  Behavior of Concrete Under Biaxial Stresses , 1969 .

[12]  H. Saadatmanesh,et al.  RC Beams Strengthened with GFRP Plates. I: Experimental Study , 1991 .

[13]  Stephen W. Tsai,et al.  A General Theory of Strength for Anisotropic Materials , 1971 .

[14]  Stephen W. Tsai,et al.  Nonlinear Elastic Behavior of Unidirectional Composite Laminae , 1973 .

[15]  H. S. Morgan,et al.  ANALYSIS OF NONLINEAR STRESS-STRAIN BEHAVIOR OF FIBER-REINFORCED COMPOSITE MATERIALS , 1976 .

[16]  William C. Schnobrich,et al.  Constitutive Modeling of Concrete by Using Nonassociated Plasticity , 1989 .

[17]  F. J. Vecchio,et al.  Analysis of Repaired Reinforced Concrete Structures , 1999 .

[18]  F. Vecchio,et al.  THE MODIFIED COMPRESSION FIELD THEORY FOR REINFORCED CONCRETE ELEMENTS SUBJECTED TO SHEAR , 1986 .

[19]  A. A. Baker.  Fibre Composite Repair of Cracked Metallic Aircraft Components , 1987 .

[20]  T. Ko,et al.  Composite patch reinforcement of cracked aircraft upper longeron : analysis and specimen simulation , 1990 .

[21]  Phalguni Mukhopadhyaya,et al.  Optimizing Structural Response of Beams Strengthened with GFRP Plates , 1998 .

[22]  L. P. Saenz.  Discussion of Equation for the Stress-strain Curve of Concrete by Desayi and Krishman , 1964 .

[23]  Prakash Desayi,et al.  EQUATION FOR THE STRESS-STRAIN CURVE OF CONCRETE , 1964 .

[24]  Hota V. S. GangaRao,et al.  Flexural Behavior and Design of RC Members Using FRP Reinforcement , 1995 .

[25]  I. Saenz,et al.  Discussion of "Equation of the Stress-Strain Curve of Concrete" , 1964 .

[26]  H. Saadatmanesh,et al.  RC Beams Strengthened with FRP Plates. II: Analysis and Parametric Study , 1991 .

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

[28]  Shankar Mall,et al.  Modeling of a cracked metallic structure with bonded composite patch using the three layer technique , 1996 .

[29]  Howard M. Adelman,et al.  Evaluation of the Tensor Polynomial and Hoffman Strength Theories for Composite Materials , 1977 .

[30]  Hamid Saadatmanesh,et al.  ANALYTICAL STUDY OF REINFORCED CONCRETE BEAMS STRENGTHENED WITH WEB-BONDED FIBER REINFORCED PLASTIC PLATES OR FABRICSANALYTICAL STUDY OF REINFORCED CONCRETE BEAMS STRENGTHENED WITH WEB-BONDED FIBER REINFORCED PLASTIC PLATES OR FABRICS , 1998 .

[31]  M. Arockiasamy,et al.  Reinforced concrete rectangular beams strengthened with CFRP laminates , 1996 .

[32]  J. W. Tedesco,et al.  Finite element method analysis of a concrete bridge repaired with fiber reinforced plastic laminates , 1999 .