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Title |
Shrinkage Stress Analysis of Concrete Slab with Shrinkage Strip in Multi-Story Building
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Keywords |
수축대; 크리프; 릴렉세이션; 건조수축; 건조수축해석; 시공단계별 해석; shrinkage strip; creep; retaxation; shrinkage; shrinkage analysis; construction sequence analysis |
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Abstract |
Shrinkage strip or separation strip is a temporary joint that is left open for a certain time during construction to allow a significant part of the shrinkage to take place without inducing stress. A shrinkage stress analysis method of shrinkage strip in concrete slab of multi-story building considering the relaxation effect of creep and construction sequence is proposed. The analysis results of 10-story example building show that the effect of shrinkage strip can be analyzed easily by the proposed method. And shrinkage strip installed in a particular floor makes the stress of that floor reduced and the stress of the other floors increased a little. The rate and amount of stress reduced with closing time mainly depends on the development of shrinkage with time of concrete model used. The amount of stress reduced is determined by the amount of shrinkage strain developed before the closing of shrinkage strip.
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