시공하중의 영향을 받는 플랫플레이트의 장기처짐

Long Term Deflection of Flat Plate Affected by Construction Load

  • 강수민 (대림산업(주) 건축연구지원팀) ;
  • 이지웅 (대림산업(주) 건축연구지원팀) ;
  • 오재근 (대림산업(주) 건축연구지원팀) ;
  • 김욱종 (대림산업(주) 건축연구지원팀) ;
  • 이도범 (대림산업(주) 건축연구지원팀) ;
  • 박홍근 (서울대학교 건축학과)
  • 발행 : 2006.11.04

초록

Serviceability of reinforced concrete building is affected dominantly by long term deflection of slab. And in case of reinforced concrete building with flat plate slab, severe long term deflection was expected because it has no beams which have large flexural stiffness. Therefore it is important to calculate exactly long term deflection of RC flat plate structure to assure its serviceability. However, current codes couldn't calculate exactly long term deflection of RC flat plate structure because they don't consider effects of boundary condition and construction load. By the way, recently the method to calculate long term deflection of RC flat plate structure was proposed by considering these effects. In the present study, long term deflection of RC flat plate structure was analyzed by comparing this method with recent experimental results. In conclusion, long term deflection of RC flat plate structure was affected considerably by effects of boundary condition, construction load and tensile strength of concrete. And recently proposed method considers these effects reasonably but it should be modified to reflect creep effect of RC flat plate slab reasonably.

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