Strength, cracking and deflection performance of large-scale self-consolidating concrete beams subjected to shear failure

Abstract An experimental investigation was conducted to study the shear strength, cracking behavior and deflection characteristics of large-scale concrete beams made with both self-consolidating concrete (SCC) and normal concrete (NC). Twenty concrete beams without shear reinforcement were tested to shear failure under simply supported three-point loading conditions. The variables were concrete type, coarse aggregate content, beam depth (150–750 mm) and longitudinal reinforcing steel ratio ( ρ w ) (1% and 2%). The performance was evaluated based on crack pattern, crack width, load at first flexure/diagonal (shear) crack, ultimate shear resistance, post-cracking shear resistance/ductility, load–deflection response and failure mode. The results showed that the ultimate shear strength of SCC beams was slightly lower than that of their NC counterparts. The results also validated the performance of various Code-based equations in predicting the crack width and first flexural cracking moment/load.

[1]  Mohamed Lachemi,et al.  Shear resistance of self-consolidating concrete beams — experimental investigations , 2005 .

[2]  E. Bentz Empirical Modeling of Reinforced Concrete Shear Strength Size Effect for Members without Stirrups , 2005 .

[3]  Hajime Okamura,et al.  EVALUATION OF SELF-COMPACTABILITY OF FRESH CONCRETE USING THE FUNNEL TEST , 1994 .

[4]  Mohammed Sonebi,et al.  Performance and Cracking Behavior of Reinforced Beams Cast with Self-Consolidating Concrete , 2003 .

[5]  Surendra P. Shah,et al.  RHEOLOGICAL MODEL FOR SELF-CONSOLIDATING CONCRETE , 2002 .

[6]  K. Khayat,et al.  Effect of Water Velocity on Performance of Underwater, Self-Consolidating Concrete , 1999 .

[7]  H. Taylor,et al.  The Fundamental Behavior of Reinforced Concrete Beams in Bending and Shear , 1974 .

[8]  Kamal H. Khayat,et al.  IN SITU MECHANICAL PROPERTIES OF WALL ELEMENTS CAST USING SELF-CONSOLIDATING CONCRETE , 1997 .

[9]  M. Lachemi,et al.  Self-compacting concrete incorporating high volumes of class F fly ash: Preliminary results , 2001 .

[10]  Mohamed Lachemi,et al.  Development of Cost-Effective Self-Consolidating Concrete Incorporating Fly Ash, Slag Cement, or Viscosity-Modifying Admixtures , 2003 .

[11]  Zdenek P. Bazant,et al.  Size effect on diagonal shear failure of beams without stirrups , 1991 .

[12]  Arthur H. Nilson,et al.  Design of concrete structures , 1972 .

[13]  Robert J. Frosch,et al.  Influence of Beam Size, Longitudinal Reinforcement, and Stirrup Effectiveness on Concrete Shear Strength , 2002 .

[14]  P. M. Ferguson,et al.  EXPLORATORY SHEAR TESTS EMPHASIZING PERCENTAGE OF LONGITUDINAL STEEL , 1968 .

[15]  Mohamed Lachemi,et al.  Self-consolidating concrete incorporating new viscosity modifying admixtures , 2004 .

[16]  Peter Gergely,et al.  Maximum Crack Width in Reinforced Concrete Flexural Members , 1968 .

[17]  T Godycki-Cwirko SHEAR IN REINFORCED CONCRETE , 1972 .

[18]  Kang Su Kim,et al.  Shear Database for Reinforced Concrete Members without Shear Reinforcement , 2003 .

[19]  Medhat H. Shehata,et al.  Influence of paste/mortar rheology on the flow characteristics of high-volume fly ash self-consolidating concrete , 2007 .

[20]  K. Hossain,et al.  Development of Statistical Models for Mixture Design of High-Volume Fly Ash Self-Consolidating Concrete , 2004 .

[21]  Mohammed Sonebi,et al.  Effect of Water Velocity on Performance of Self-Consolidating Underwater-cast Concrete , 1999 .

[22]  Mohammed Sonebi,et al.  Hardened SCC and its bond with reinforcement , 1999 .

[23]  Michael P. Collins,et al.  A general shear design method , 1996 .

[24]  Zdenek P. Bazant,et al.  Size Effect in Diagonal Shear Failure: Influence of Aggregate Size and Stirrups , 1987 .

[25]  Joost C. Walraven,et al.  Parameter-study on the influence of steel fibers and coarse aggregate content on the fresh properties of self-compacting concrete , 2001 .