| Summary |
In this study, wind tunnel experiments were carried out to investigate the wind force coefficients for designing the main wind force resisting system of a cylindrical free roof composed of framework membrane structure. Pressures at many points on both the top and bottom surfaces of a rigid roof model with a rise/span ratio of 0.1 and a side ratio of 1 were measured simultaneously in a turbulent boundary layer. Based on the results obtained, the characteristics of wind pressures and forces acting on the cylindrical free roof were investigated. Then, the critical condition providing the maximum load effect was determined according the results of structural frame analysis. Focus was on the bending moment at the windward column top and the axial force induced in the leeward column as the load efects. The LRC method proposed by Kasperski was employed for evaluating the equivalent static wind force coefficients providing the maximum load effects. Finally, a model of design wind force coefficients to be used in the framework of conventional gust effect factor approach was proposed. |