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http://dx.doi.org/10.12652/Ksce.2010.30.4A.383

Deflection Calculation Based on Stress-Strain Curve for Concrete in RC Members  

Choi, Seung-Won ((사)한국콘크리트학회 콘크리트공학연구소)
Kim, Woo (전남대학교 토목공학과)
Publication Information
KSCE Journal of Civil and Environmental Engineering Research / v.30, no.4A, 2010 , pp. 383-389 More about this Journal
Abstract
The concrete structural design provisions in Korea are based on ultimate strength design. Up to service load stage, it is assumed a linear stress-strain relation, but there is no stress-strain relationship for a concrete material from service load stage to limat state. According to the current provisions, an independent method is provided for the each calculation of deflection and crack width. In EC2 provisions based on limit state design, however, a stress-strain relationship of concrete is provided. Thereby, it is able to calculate a strength as well as a deflection directly from concrete stress-strain relationship. In this paper the moment-curvature relationship is directly calculated from a material law using equilibrium and compatibility conditions. Then strength and deflection are formulated. These results are compared with the values from the current provisions in Korea. From the results, the deflection based on a moment-curvature relationship is well agreed with experimental results and it is appeared that the deflection after the yielding of steel is also possible.
Keywords
limit state design; ultimate strength design; moment-curvature relationship; deflection;
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