Cable network system is a flexible lightweight structure which curved cables can transmit only tensile forces. The weight of cable roof dramatically can reduce when the length becomes large. The cable network system is too flexible, most cable systems are stabilized by pretension forces. The tensile force of cable system is greatly influenced by the sag ratio and pretension forces. Determining initial sag ratio of cable roof system is essential in a design process of cable structures. Final sag ratio and pretension depends on initial installed sag and on proper handling during installation. The design shape of cable system has an affect on the sag and pretension, and must be determined using well-defined design philosophy. This paper is carried out the comparative data of the deflection and tensile forces on the geometric non-linear analysis of cable network systems according to sag ratio. The study of cable network system is provided to technical informations for the design of a large span cable roof, analytical results are compared with the results of other researchers. Structural nonlinear analysis of systems having cable elements is relatively complex than other rigid structural systems because displacements are large as a reason of flexibility, initial prestress is applied to cables in order to increase the rigidity, and then divergence of nonlinear analysis occurs rather frequently. Therefore, cable network systems do not exhibit a typical nonlinear behavior, iterative method that can handle geometric nonlinearities are necessary.

1. 서론
 2. 케이블 네트 구조물
 3. 케이블 네트 구조물의 비선형해석
  3.1 격자형 케이블 네트구조의 비선형해석
  3.2 안장형 케이블 네트구조의 비선형해석
  3.3 늘어진 케이블 네트 구조의 비선형해석
 4. 결론
 감사의 글
 References

• 박강근(한국공간구조공학회) | Park Kang-Geun 교신저자
• 이동우((주)아이스트) | Lee Dong-Woo