FraMCoS 5 2004 Vail, Colorado, USA

The Effect of Tensile Fracture Energy on the Size Effect for Shear Strength of Reinforced Concrete Beam Members Utilizing High Strength Concrete

The authors confirmed the effectiveness of applying fracture mechanics to the size effect in shear strength for RC beams of high strength concrete without shear reinforcements. However, very few studies have been conducted for the fracture mechanics performance of high…

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Year 2004
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Abstract

The authors confirmed the effectiveness of applying fracture mechanics to the size effect in shear strength for RC beams of high strength concrete without shear reinforcements. However, very few studies have been conducted for the fracture mechanics performance of high strength concrete. Therefore 2 Fracture energy tests were performed on concrete with compressive strength in the range 35 N/mm to 145 2 N/mm. Next, a program for estimating a tension softening curve using poly-linear approximation analysis was applied. The analysis method faithfully reproduced the test results, even for high strength concrete. The relationship between fracture energy and compressive strength in the test results showed different 2 trends above and below 80 N/mm . Characteristic length displayed a high degree of correlation with com- pressive strength, and the regression equation was obtained. The regression equation was then utilized to examine the size effect in relation to shear strength.