doi:

DOI: 10.3724/SP.J.1249.2019.01087

Journal of Shenzhen University Science and Engineering (深圳大学学报理工版) 2019/36:1 PP.87-93

Finite element analysis of fiber reinforced polymer shear strengthened deep beams with small shear span ratio


Abstract:
In order to carry out a comprehensive numerical simulation and analysis on the shear performance of the U-shaped fiber reinforced polymer (FRP) shear-reinforced beams with a small shear span-to-effective depth ratio, we use the ATENA finite element analysis software to establish a constitutive model of concrete combined with the latest achievements of the fracture energy theory and damage theory. The effectiveness and universality of the model are verified by using the famous reinforced concrete beams with a small shear span-to-effective depth ratio. The simulation results indicate that the concrete constitutive model has unique accuracy in simulating crack development and the nonlinear mechanical behavior of the member after the cracking of the carbon fiber shear reinforced concrete beam. Under small shear span ratio, the load-deflection curve, crack development distribution and component failure mode predicted by the advanced finite element model are in good agreement with the experimental results.

Key words:structural engineering,fiber reinforced polymer (FRP),reinforced concrete (RC) beam,shear-strengthening,shear span-to-effective depth ratio,finite element method (FEM),numerical simulation

ReleaseDate:2019-01-28 09:56:35



[1] GODAT A, NEALE K W, LABOSSIEÈRE P. Numerical modeling of FRP shear strengthened reinforced concrete beams[J]. Journal of Composites for Construction, 2007, 11(6):640-649.

[2] FIELDS K, BISCHOFF P H. Tension stiffening and cracking of high-strength reinforced concrete tension members[J]. ACI Structural Journal, 2004, 101(4):447-456.

[3] BISCHOFF P H. Reevaluation of deflection prediction for concrete beams reinforced with steel and fiber reinforced polymer bars[J]. Journal of Structural Engineering, 2005, 131(131):752-767.

[4] BISCHOFF P H, SCANLON A. Effective moment of inertia for calculating deflections of concrete members containing steel reinforcement and fiber-reinforced polymer reinforcement[J]. ACI Structural Journal, 2007, 104(1):68-75.

[5] GODAT A, LABOSSIÈRE P, NEALE K W. Numerical investigation of the parameters influencing the behavior of FRP shear-strengthened beams[J]. Construction & Building Materials, 2012, 32(4):90-98.

[6] GODAT A, QU Z, LU X Z, et al. Size effects for reinforced concrete beams strengthened in shear with CFRP strips[J]. Journal of Composites for Construction, 2010, 14(3):260-271.

[7] LU X Z, TENG J G, YE L P, et al. Bond-slip models for FRP sheets/plates bonded to concrete[J]. Engineering Structures, 2005, 27(6):920-937.

[8] CHEN G M. Behavior and strength of RC beams shear-strengthened with externally bonded FRP reinforcement[D]. Hong Kong:Hong Kong Polytechnic University, 2010.

[9] 徐文冰. 基于混凝土塑性损伤理论的FRP抗剪加固RC梁的有限元分析[D]. 深圳:深圳大学, 2015. XU Wenbing. FRP shear reinforcement based on the theory of the plastic damage of concrete finite element analysis of RC beams[D]. Shenzhen:Shenzhen University, 2015.(in Chinese)

[10] LEONHARD R. Schubversuche an eingeldrigen Stahlbetonbalken mit und ohne Schubbewehrung[J]. Deutscher Ausschuss Fur Stahlbeton Heft, 1962, 151:29-40.

[11] KUPFER H B. Behavior of concrete under biaxial stresses[J]. Journal of the Engineering Mechanics Division, 2015, 99(8):853-866.

[12] DARWIN D, PECKNOLD D. Nonlinear biaxial stress-strain law for concrete[J]. Journal of Engineering Mechanics, 1977, 103(2):229-241.

[13] HORDIJK D A. Local approach to fatigue of concrete[D]. Delft:Delft University, 1991.

[14] CEB-FIP Model code 1990:design code[S].

[15] LI W W, CHRISTOPHER K Y L. Effect of shear span-depth ratio on mechanical performance of RC beams strengthened in shear with U-wrapping FRP strips[J]. Composite Structures, 2017, 177:141-157.