The objective of this study is to analysis the mechanical characteristics on the geometric nonlinear behavior of radial cable roof systems for long span retractable cable roof structures. The retractable roof is designed as a full control system to overcome extreme outdoor environments such as extreme hot or cold weather, strong wind or sunlight, and the cable roof greatly can reduce roof weight compared to other rigid structural system. A retractable cable roof system is a type of structures in which the part of entire roof can be opened and closed. The radial cable roof is an effective structural system for large span retractable roofs, the outer perimeter of the roof is a fixed membrane roof and the middle part is a roof that can be opened and closed. The double arrangement cables of a radial cable truss roof system with reverse curvature works more effectively as a load bearing cables, the cable system can carry vertical load in up and downward direction. In this paper, to analyze the mechanical characteristics of a radial cable roof system with central posts, the authors will investigate the tensile forces of bearing cables, stabilized cables, ring cables, and the deflection of roof according to the height of the post or hub that affects the sag ratio of cable truss. The tensile forces of the cables and the deflection of the roof are compared for the cases when the retractable roof is closed and opened.

1. 서론
 2. 방사형 케이블의 지붕 시스템의 비선형 거동에 대한 역학적 특성
  2.1 방사형 케이블 지붕 시스템
  2.2 방사형 케이블 지붕 시스템의 역학적 거동
  2.3 스포크 휠 지붕 시스템의 역학적 거동
   3.1 방사형 케이블 지붕시스템에 대한 고찰
   3.2 스포크 휠 케이블 지붕시스템에 대한 고찰
 3. 비교 및 고찰
 감사의 글
 References

• 박강근((주)아이스트 기술연구소, 공학박사) | Park Kang-Geun 교신저자
• 이동우((주)아이스트, 공학박사) | Lee Dong-Woo
• 최동일(인천도시공사) | Choe Dong-Il