Volume 9 Issue 1 - September 2017

  • 1. Design of cable net-membrane roofs with reverse curvature by nonlinear analysis

    Authors : Prof Kanggeun Park, Prof Boongkyo Seo, Prof Sanghwa Shin, Prof Mijin Park

    Pages : 113-118

    DOI : http://dx.doi.org/10.21172/1.91.17

    Keywords : Cable net-membrane roof, Reverse curvature, Cable element, Triangular membrane element, Geometric nonlinear analysis, Mechanical characteristics

    Abstract :

    This study is to analyze for the design considerations and mechanical characteristics on the cable net-membrane roof. Because cable net-membrane systems have no compression members, the weight of the roof can be greatly reduced. The cables have very high tensile strength, but the flexural stiffness is very low, resulting in large deformations. In order to minimize the deformation of the flexible cable roof system the required rigidity should be ensured by introducing the prestress of cables. Cable net roof systems with upward and downward reverse curvatures can be reduced very effectively the deformation of the roof for the external loads. The reverse curvature cable system is an effective roof system for vertical load. The cable element is defined as only transmitting tension, and the membrane element is assumed as occurring a membrane deformation, ignoring the coupling and out-of-plane shear deformation, so there is no stiffness in the direction perpendicular to the surface of the element. The triangular membrane element has only three degrees of freedom at the node. In this study, geometric nonlinear analysis of cable net-membrane with a reverse curvature roof system according to the sag ratio of ridge cables and the rise ratio of valley cables is performed to understand the mechanical characteristics of overall roof.

    Citing this Journal Article :

    Prof Kanggeun Park, Prof Boongkyo Seo, Prof Sanghwa Shin, Prof Mijin Park, "Design of cable net-membrane roofs with reverse curvature by nonlinear analysis ", https://www.ijltet.org/journal_details.php?id=921&j_id=3981, Volume 9 Issue 1 - September 2017, 113-118, #ijltetorg