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http://dx.doi.org/10.7734/COSEIK.2017.30.4.343

Analysis of Weight Reduction Effect of Void Slab on Long and Short Term Deflections of Flat Plates  

Kim, Jae-Yo (Dept. of Architectural Engineering, KwangWoon Univ.)
Publication Information
Journal of the Computational Structural Engineering Institute of Korea / v.30, no.4, 2017 , pp. 343-350 More about this Journal
Abstract
The RC flat plate system has benefits such as a short construction time, an improvement of workability and a floor height reduction. In the case of long span slab, cracking damages and large deflections tend to occur due to the low flexural stiffness of flat plates. Specially, over-loading by self-weight of slab during construction increases short and long-term deflections. These problems may be solved by the use of void slab that has benefits of the reduced self-weight. In this study, to analyze an effect of self-weight reduction of void slab on slab deflections, the parametric study is performed. Including variable conditions such as a concrete strength, a slab construction cycle, the number of shored floors, a compressive reinforcement ratio and a tensile reinforcement ratio, slab construction loads and deflections are calculated by considering the construction stages, concrete cracking, and long-term effects. The short-term deflections during construction and the long-term deflections after construction of both of normal and void slabs are compared and the effects of void slab on the reduction of slab deflections are analyzed.
Keywords
flat plate; void slab; long-term deflection; short-term deflection; construction load;
Citations & Related Records
Times Cited By KSCI : 9  (Citation Analysis)
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