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http://dx.doi.org/10.4334/JKCI.2010.22.6.761

Influence of Tension Stiffening Effect on Deflection and Crack Width in RC Members  

Choi, Seung-Won (KCI Research Center, Korea Concrete Institute)
Yang, Jun-Ho (Hyo Jin Engineering)
Kim, Woo (Dept. of Civil Engineering, Chonnam National University)
Publication Information
Journal of the Korea Concrete Institute / v.22, no.6, 2010 , pp. 761-768 More about this Journal
Abstract
When cracks occur in reinforced concrete structures, a steel carries all tensile force at crack section, while the concrete between cracks carries a part of the tensile force due to bond, so that the steel is less elongated. This is called the tension-stiffening effect, that plays an important role in verification of a serviceability limit state. But it is a complicated work to use a complex strain distribution between cracks, therefore an average strain is used to calculate deflection and crack width. In Eurocode 2, tension-stiffening effect expressed in the first order form or the second order form is used in calculating an average curvature for deflection. In this study for a flexural member deflection and crack width are calculated using various models for the tension-stiffening effect and the results are compared with the values of Eurocode 2 and KCI provisions. As results, the predicted values using the second order form are appeared to be well agreed with the experimental values and it could secure more analytical consistency.
Keywords
tension-stiffening effect; average curvature; deflection; crack width;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
연도 인용수 순위
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