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http://dx.doi.org/10.11112/jksmi.2012.16.1.044

Parametric Study on Long-Term Deflections of Flat Plates Considering Effects of Construction Loads and Cracking  

Choi, Seung Min (광운대학교 건축공학과)
Eom, Tae Sung (대구가톨릭대학교 건축학부)
Kim, Jea Yo (광운대학교 건축공학과)
Publication Information
Journal of the Korea institute for structural maintenance and inspection / v.16, no.1, 2012 , pp. 44-54 More about this Journal
Abstract
The structural designs of RC flat plates that have no flexural stiffness by boundary beams may be governed not by strength conditions but by serviceabilities. Specially, since over-loading and tensile cracking in early-aged slabs significantly increase the immediate and long-term deflections of a flat plate system, a construction sequence and its impact on the slab deflections may be decisive factors in designs of flat plate systems. In this study, the procedure of calculating slab deflections with considering construction sequences, concrete cracking, and long-term effects is proposed. Using the proposed method, the parametric study for deflections of flat plates is performed. With various conditions for slab construction cycle, the number of shored floors, tensile or compressive reinforcement ratio, compressive strength of concrete, construction live load, and slab thickness, the immediate deflection during construction and long-term deflections after completion are analyzed. The calculated results are compared with the serviceability limits offered by the structural design code.
Keywords
Flat Plate; Long-Term deflection; Construction load; Crack; Reinforced concrete;
Citations & Related Records
Times Cited By KSCI : 5  (Citation Analysis)
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