Multi-Stepwise Prestressing Method of Steel Structure Using Thermal-Expanded Cover-plate

커버플레이트의 온도변형을 이용한 강구조물의 다단계 프리스트레싱

  • 김상효 (연세대학교 사회환경시스템공학부) ;
  • 안진희 (연세대학교 토목공학과) ;
  • 김준환 (연세대학교 토목공학과) ;
  • 김형주 (연세대학교 대학원 토목공학과)
  • Received : 2006.09.15
  • Accepted : 2006.10.26
  • Published : 2006.12.27

Abstract

This study investigates developments in a prestressing method using the thermal-expanded cover-plates that increases the load-carrying capacity of structures by installing it on upper or lower flanges in case that huge flexural stiffness according to the increase in span length or load are required of steel structure, such as rolled H-beam or built-up beam. This method applies multi-stepwise contraction forces generated by the contraction of cover plates as prestressing forces after joining the cover plate applied by multi-stepwise thermal expansion that was applied to induce prestressing to structures. To perform a theoretical investigation of the prestressing force applied to a structure due to the thermal expansion and induce a multi-stepwise prestressing method using multi-stepwise thermal distribution, this study proposes a theoretical heat transfer solution for the multi-stepwise thermal distribution of cover plates and analyzes the effect of a multi-stepwise prestressing method using the multi-stepwise thermal expansion.

Acknowledgement

Supported by : (주)승화이엔씨, 교육인적자원부

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