Abstract
<p>Concrete is a typical quasi-brittle material, which inevitably exhibits size effect on the nominal structural strength. This study is focussed on the size effect in shear failure of reinforce concrete beams. By statistical analysis it is shown that if the size effect is ignored, the failure frequency (or probability) of large reinforced beams under shear may typically increase by three orders of magnitude. By computer simulations based on fracture mechanics it is further shown that shear reinforcement cannot eliminate the size effect in large reinforced concrete beams.</p>
Publisher
International Association for Bridge and Structural Engineering (IABSE)
Reference44 articles.
1. Shear and Diagonal Tension;Journal of the American Concrete Institute (ACI Journal Proceedings)
2. Reineck, K.-H., Kuchma, D. A., Kim, K. S. and Marx, S. "Shear Database for ReinforcedConcrete Members without Shear Reinforcement", ACI Structural Journal, V. 100, No.2, March-April 2003, pp. 240-249.
3. Podgorniak-Stanik, B.A. The influence of concrete strength, distribution of longitudinal reinforcement, amount of transverse reinforcement and member size on shear strength of reinforced concrete members. M.A.Sc. Thesis, Department of Civil Engineering, University of Toronto, 1998.
4. Angelakos, D, Bentz, E.C., and Collins, M.P. "Effect of Concrete Strength and Minimum Stirrups on Shear Strength of Large Members", ACI Structural J., 98 (3), 2001, pp. 290-300.
5. Bažant, Z.P., Sener, S. and Prat, P.C. "Size Effect Tests of Torsional Failure of Plain and Reinforced Concrete", Materials and Structures (RILEM, Paris), 21, 1988, pp. 425-430.