Proceedings of the Korea Concrete Institute Conference (한국콘크리트학회:학술대회논문집)
- 2000.10a
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- Pages.115-120
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- 2000
Effects of Specimen Depth on Flexural Compressive Strength of Concrete
콘크리트의 휨압축강도에 미치는 부재깊이의 영향
Abstract
Currently, in evaluating a flexural strength of a concrete member, the effect of specimen depth has not been systematically studied, even though its effect on ultimate strength of a section is very important. For all types of loading conditions, the trend is that the strength of a member tends to decrease when the member depth increases. In this study, the influence of specimen depth on flexural compressive strength of concrete member was examined experimentally. A series of C-shaped specimens subjected to axial compressive force and bending moment were tested using three geometrically similar specimens with different length-to-depth ratios(h/c=1, 2 and 4) which have compressive strength of 55MPa. The results indicate that the flexural compressive strength decreased as the specimen depth increased. A model equation was derived based on regression analyses of the experimental data. Also the results show that ultimate strain decreases as the specimen depth increases. Finally, a general model equation for the depth effect is proposed.
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