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Effects of Specimen Length on Flexural Compressive Strength of Concrete
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 Title & Authors
Effects of Specimen Length on Flexural Compressive Strength of Concrete
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 Abstract
In evaluating the ultimate strength of a section for a reinforced concrete flexural member, the effect of member length is not usually considered, even though the strength tends to decrease with increase of member length. In this paper the influence of specimen length on flexural compressive strength of concrete was evaluated. For this purpose, a series of C-shaped specimens subjected to axial compression and bending moment were tested using four different length-to-depth ratios (from 1,2,3 and 4) of specimens with compressive strength of 590 kgf/. Results indicate that for the region of h/c <3.0 the reduction in flexural compressive strength with increase of length-to-depth ratios was apparent. A model equation was depth of an equivalent rectangular stress block was larger than that by ACI. It was also founded that the effect of specimen length on ultimate strain was negligible. Finally more general model equation is also suggested.
 Keywords
size effect;specimen length;C-shaped specimen;flexural compressive strength;model equation;
 Language
Korean
 Cited by
1.
부재의 깊이가 콘크리트의 휨압축강도에 미치는 영향,이성태;김진근;김장호;

한국콘크리트학회논문집, 2000. vol.12. 5, pp.121-130 crossref(new window)
2.
노치가 있는 콘크리트 실험체의 축압축 강도에 대한 크기효과,이성태;김봉준;김진근;

한국콘크리트학회논문집, 2000. vol.12. 6, pp.99-108 crossref(new window)
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