Title:
Fracture Mechanics Approach to Evaluation of Flexural Strength of Concrete
Author(s):
Keitetsu Rokugo, YuichiUchida Hidenori Katoh, and Watani Koyanagi
Publication:
Materials Journal
Volume:
92
Issue:
5
Appears on pages(s):
561-566
Keywords:
concretes; flexural strength; tensile strength; tension; Structural Research
DOI:
10.14359/901
Date:
9/1/1993
Abstract:
Size effects and shape effects on the flexural strength of concrete (square or circular cross section) were investigated through experiments and numerical analysis with fracture mechanics concepts. Based on the numerical results, the authors propose an equation for estimating the flexural strength of concrete beams with square or circular cross section. The beam depth, tensile strength, and characteristic length of concrete beams are the parameters is the proposed equation. The estimated values of flexural strength given by the equation are in good agreement with the experimental results, especially for the square beams. The equation gives moderate values for the flexural strengths of various kinds of concrete, including normal concrete, high-strength concrete, lightweight concrete, mortar, and polyester resin concrete.