Finite/discrete element model of tension stiffening in GFRP reinforced concrete

Abstract The purpose of this paper is to investigate the phenomenon of tension stiffening in concrete reinforced with glass fibre polymer (GFRP) bars. The nature of the tension stiffening phenomenon is first described according to theory. Then, the results of an experimental campaign aiming to investigate tension stiffening quantitatively are presented and critically discussed, examining potential factors such as shrinkage that could have affected the measurements. Finally, the numerical models that reproduce the experiments are described and the results compared with both the theory and the experiments themselves. Good agreement is found between model and experimental data.

[1]  Željana Nikolić,et al.  Nonlinear analysis of engineering structures by combined finite-discrete element method , 2013 .

[2]  Evan C. Bentz,et al.  Explaining the Riddle of Tension Stiffening Models for Shear Panel Experiments , 2005 .

[3]  V. Gribniak,et al.  Experimental study of tension stiffening in GFRP RC tensile members under sustained load , 2014 .

[4]  Yukimasa Goto,et al.  CRACKS FORMED IN CONCRETE AROUND DEFORMED TENSION BARS , 1971 .

[5]  K. Maekawa,et al.  Nonlinear mechanics of reinforced concrete , 2003 .

[6]  O. K. Mahabadi,et al.  An Example of Realistic Modelling of Rock Dynamics Problems: FEM/DEM Simulation of Dynamic Brazilian Test on Barre Granite , 2010 .

[7]  D. Mitchell,et al.  Prestressed concrete structures , 1991 .

[8]  O. K. Mahabadi,et al.  Y-GUI: A graphical user interface and pre-processor for the combined finite-discrete element code, Y2D, incorporating material heterogeneity , 2010, Comput. Geosci..

[9]  Peter H. Bischoff,et al.  Tension stiffening and cracking of concrete reinforced with glass fiber reinforced polymer (GFRP) bars , 2004 .

[10]  Thomas T. C. Hsu,et al.  SOFTENED MEMBRANE MODEL FOR REINFORCED CONCRETE ELEMENTS IN SHEAR , 2002 .

[11]  O. K. Mahabadi,et al.  Y-Geo: New Combined Finite-Discrete Element Numerical Code for Geomechanical Applications , 2012 .

[12]  N. Živaljić,et al.  A combined finite-discrete element model for RC structures under dynamic loading , 2013 .

[13]  Koichi Maekawa,et al.  Computational Model for Reinforcing Bar Embedded in Concrete under Combined Axial Pullout and Transverse Displacement. , 1996 .

[14]  Koichi Maekawa,et al.  Path-Dependent High Cycle Fatigue Modeling of Joint Interfaces in Structural Concrete , 2008 .

[15]  K. Pilakoutas,et al.  TENSION STIFFENING IN GFRP REINFORCED CONCRETE BEAMS , 2006 .

[16]  Gintaris Kaklauskas,et al.  Comparative analysis of deformations and tension-stiffening in concrete beams reinforced with GFRP or steel bars and fibers , 2013 .

[17]  R. Okelo,et al.  Bond Strength of Fiber Reinforced Polymer Rebars in Normal Strength Concrete , 2005 .

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

[19]  Mervyn J. Kowalsky,et al.  Displacement-based seismic design of structures , 2007 .

[20]  Željana Nikolić,et al.  Computational aspects of the combined finite–discrete element method in modelling of plane reinforced concrete structures , 2014 .

[21]  Nicholas J. Carino,et al.  Tensile and Nondestructive Testing of FRP Bars , 1998 .

[22]  A. Munjiza.  The Combined Finite-Discrete Element Method , 2004 .