| The in-depth contents | |
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| Publication year | 2024 |
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| Title | Research on the Required Internal Pressure Control of Cylinder- shaped Pneumatic Structures with Spherical Roofs - Part 1 Derivation of the Simplified Calculation Formula |
| Author | Eizo Maruta(WIND & PHYSICS LLC),Masaya Kawabata (Yokohama National University),Takeshi Ibi (DAIKA Industrial Co. Ltd.) |
| Summary |
In this study, a simplified calculation method is proposed for controlling the required internal pressure and determining the maximum tensile force in the axial direction of a cylindrical air membrane structure with a spherical dome roof, with the aim of ensuring structural safety against wind loads. The required internal pressure is derived from the equilibrium of tension based on the basic tension of internal pressure to restore deformations such as expansion and contraction of the membrane due to external wind forces, in addition to the initial internal pressure against the membrane weight and initial tension based on statics assumptions for a thin-film spherical dome shell, and the buckling limit of the lower membrane under wind pressure. Regarding the calculation, the external pressure coefficients for spherical roof structures are based on Recommendation for Load on Buildings of the Architectural Institute of Japan, and for the cylindrical part, external pressure distributions based on previous wind tunnel experiments are referenced. Additionally, the influence of variations in the rise ratio of the dome roof and the height-to-width ratio of the cylinder is considered. |