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http://dx.doi.org/10.4334/JKCI.2010.22.3.427

Variation of Bilinear Stress-Crack Opening Relation for Tensile Cracking of Concrete at Early Ages  

Kwon, Seung-Hee (Dept. of Civil and Environmental Engineering, Myongji University)
Choi, Kang (Dept. of Civil and Environmental Engineering, Myongji University)
Lee, Yun (Dept. of Architectural tural Engineering, Ewha Womans University)
Park, Hong-Yong (Dept. of Civil and Environmental Engineering, Myongji University)
Publication Information
Journal of the Korea Concrete Institute / v.22, no.3, 2010 , pp. 427-435 More about this Journal
Abstract
One of the most vulnerable properties in concrete is tensile cracking, which usually happens at early ages due to hydration heat and shrinkage. In order to accurately predict the early age cracking, it needs to find out how stress-crack opening relation is varying over time. In this study, inverse analyses were performed with the existing experimental data for wedge-splitting tests, and the parameters of the softening curve for the stress-crack opening relation were determined from the best fits of the measured load-CMOD curves. Based on the optimized softening curve, variation of fracture energy over time was first examined, and a model for the stress-crack opening relation at early ages was suggested considering the found feature of the fracture energy. The model was verified by comparisons of the peak loads, CMODs at peak loads, and fracture energies obtained from the experiments and the inverse analysis.
Keywords
stress-crack opening relation; softening curve; cracking; ordinary concrete; wedge splitting test; inverse analysis;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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