Tension stiffening in reinforced high performance fiber reinforced cement-based composites

Abstract High Performance Fiber-Reinforced Cement-based Composite (HPFRCC) materials carry tension to strains greater than the yield strain of reinforcing steel and exhibit distributed compression damage with minimal spalling. Characterization of the interaction between the composite and steel reinforcement to large strains (i.e., >0.005) remains largely unknown. Three HPFRCC materials as well as concrete with a single reinforcing bar are tested in a prismatic specimen in uniaxial tension up to fracture of the reinforcement. Multiple cracking of the composite led to uniform bar yielding throughout the specimen and early hardening of the reinforcement at the location of dominant cracks. The reinforcement fractured within the HPFRCC at lower strain levels relative to the reinforced concrete. A modified approach based on planar analysis to estimate flexural strength of reinforced HPFRCC components using tension-stiffening data is proposed.

[1]  Sarah L. Billington,et al.  Cyclic Response of Unbonded Posttensioned Precast Columns with Ductile Fiber-Reinforced Concrete , 2004 .

[2]  Gregor Fischer,et al.  Influence of Matrix Ductility on Tension-Stiffening Behavior of Steel Reinforced Engineered Cementitious Composites (ECC) , 2002 .

[3]  Sarah L. Billington,et al.  Tension-Stiffening in Reinforced High Performance Fiber-Reinforced Cement-Based Composites under Direct Tension , 2012 .

[4]  K. Kesner,et al.  Investigation of infill panels made from engineered cementitious composites for seismic strengthening and retrofit , 2005 .

[5]  Denis Mitchell,et al.  INFLUENCE OF STEEL FIBERS ON TENSION STIFFENING , 1997 .

[6]  Mathias Flansbjer,et al.  Experimental investigation of surface crack initiation, propagation and tension stiffening in self-compacting steel–fibre-reinforced concrete , 2012 .

[7]  Roberto T. Leon,et al.  Bond mechanics including pull-out and splitting failures , 2000 .

[8]  Gregor Fischer,et al.  EFFECT OF MATRIX DUCTILITY ON DEFORMATION BEHAVIOR OF STEEL-REINFORCED ECC FLEXURAL MEMBERS UNDER REVERSED CYCLIC LOADING CONDITIONS , 2002 .

[9]  Seong-Cheol Lee,et al.  Tension-stiffening model for steel fiber-reinforced concrete containing conventional reinforcement , 2013 .

[10]  Peter H. Bischoff,et al.  Tension Stiffening and Cracking of Steel Fiber-Reinforced Concrete , 2003 .

[11]  C. P. Ostertag,et al.  Performance-Based Approach for the Design of a Deflection Hardened Hybrid Fiber-Reinforced Concrete , 2009 .

[12]  Denis Mitchell,et al.  Influence of Splitting Cracks on Tension Stiffening , 1996 .

[13]  Sarah L. Billington,et al.  Creep and Shrinkage of High-Performance Fiber-Reinforced Cementitious Composites , 2007 .

[14]  Mohamed Maalej,et al.  Introduction of Strain-Hardening Engineered Cementitious Composites in Design of Reinforced Concrete Flexural Members for Improved Durability , 1995 .

[15]  V. Li.  On Engineered Cementitious Composites (ECC) , 2003 .

[16]  James K. Wight,et al.  Experimental Study on Seismic Behavior of High-Performance Fiber-Reinforced Cement Composite Coupling Beams , 2005 .

[17]  Joshua Blunt,et al.  Deflection Hardening and Workability of Hybrid Fiber Composites , 2009 .