| The in-depth contents |
| Publication year |
1999 |
| PDF |
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| Title |
A NEW RETRACTABLE MEMBRANE SYSTEM USING TWISTED CYLINDRICAL MEMBRANE PATIERN |
| Author |
Ken'ichi Kawaguchi,Yuuko Ozawa
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| Summary |
Membrane is a very useful material and its flexibility is one of its remarkable features，which we do not see in other structural materials. This flexibility is exploited during the construction of membrane structures: the membrane is usually transported to the site folded or rolled and unfolded or unrolled there. Since it is flexible. it is easy to handle and put in position. However，once the construction of the structure is completed and the membrane is fixed in its designed position，its flexibility is rarely utilized again. In the paper a new approach for retractable membrane structure system using flexibility of membrane is proposed. The fundamental system is based on the folding pattern of a cylinder into a flat disk through a twisting motion. The opening of a cylinder can be easily closed by a simple relative rotation of its boundary rings. A simple relationship in the geometry of the folding pattern is shown，so me applications to retractable membrane roofs， especially to retractable pneumatic roofs are described and a result of numerical analysis is also discussed.
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