強風下における機械的固定工法による防水層の挙動の風洞実験による観察

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タイトル別名
  • BEHAVIOR OF MECHANICALLY ANCHORED WATERPROOFING MEMBRANE EXPOSED TO HIGH WIND SPEED OF WIND TUNNEL
  • キョウフウ カ ニ オケル キカイテキ コテイ コウホウ ニ ヨル ボウスイソウ ノ キョドウ ノ フウドウ ジッケン ニ ヨル カンサツ

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抄録

A waterproofing membrane is partially fixed to a substrate by fasteners in mechanically anchored systems. For designing a safer anchored waterproofing system against typhoons, it is needed to make clear the behavior of it under strong wind. Two kinds of full size specimens with a parapet and without one were exposed to high wind speed of a wind tunnel. The behavior of the system was investigated from the three aspects such as wind forces to a membrane, deformation of a membrane and tensile forces of fasteners induced by high wind. Strong wind force was observed in the area close to the windward edge for the roof without a parapet and about 1m on the leeward from a parapet for the roof with a parapet. The membrane was lifted up by wind to about 60mm in maximum height and was extended to about 0.6% in maximum elongation and it oscillated about 5-20Hz in periodic time. The tensile force of more than 160N was observed in some fasteners, depending on the location in the roof.

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