Steel and Composite Structures

  • 제18권6호
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  • Pages.1391-1404
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  • 2015
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  • 1229-9367(pISSN)
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  • 1598-6233(eISSN)
테크노프레스 (Techno-Press)
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Static analysis of a radially retractable hybrid grid shell in the closed position

  • Cai, Jianguo (Key Laboratory of C & PC Structures of Ministry of Education, National Prestress Engineering Research Center, Southeast University) ;
  • Jiang, Chao (Key Laboratory of C & PC Structures of Ministry of Education, National Prestress Engineering Research Center, Southeast University) ;
  • Deng, Xiaowei (Department of Structural Engineering, University of California) ;
  • Feng, Jian (Key Laboratory of C & PC Structures of Ministry of Education, National Prestress Engineering Research Center, Southeast University) ;
  • Xu, Yixiang (Department of Civil Engineering, Strathclyde University)
  • 투고 : 2014.05.29
  • 심사 : 2014.11.26
  • 발행 : 2015.06.25
⟨ 이전 논문 다음 논문 ⟩

초록

A radially retractable roof structure based on the concept of the hybrid grid shell is proposed in this paper. The single-layer steel trusses of the radially foldable bar structure are diagonally stiffened by cables, which leads to a single-layer lattice shell with triangular mesh. Then comparison between the static behavior between the retractable hybrid grid shell and the corresponding foldable bar shell with quadrangular mesh is discussed. Moreover, the effects of different structural parameters, such as the rise-to-span ratio, the bar cross section area and the pre-stress of the cables, on the structural behaviors are investigated. The results show that prestressed cables can strengthen the foldable bar shell with quadrangular mesh. Higher structural stiffness is anticipated by introducing cables into the hybrid system. When the rise-span ratio is equal to 0.2, where the joint displacement reaches the minimal value, the structure shape of the hyrbid grid shell approaches the reasonable arch axis. The increase of the section of steel bars contributes a lot to the integrity stiffness of the structure. Increasing cable sections would enhance the structure stiffness, but it contributes little to axial forces in structural members. And the level of cable prestress has slight influence on the joint displacements and member forces.

키워드

과제정보

연구 과제 주관 기관 : National Natural Science Foundation of China

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