건설재료시공학연구실

Building material & construction lab.

Abstract

 This study provides investigation results and discussion on axial forces and lateral forces applied to waterproofing membrane and fasteners, mainly purposed to demonstrate lateral forces affecting the mechanically-anchored waterproofing membrance system when subjected to strong winds during a typhoon on the island of Miako in 2009. The polyvinyl chloride waterproofing membrane reinforced with polyester fiber was attached to the flat roof without parapets and the forces of fastener were measured by 6 component force transducer. It was considered that the lateral force affecting fastener of waterproofing membrane occurs by the difference between the windward and leeward at the fastener. Average lateral force of fastener was same value as its vertical force and a maximum lateral force was 1.7 times of it. The tension which pulled PVC sheet up was approximately 4 times as much as the wind pressure at the height of eaves of the building. It is presumed that such lateral forces and axial forces causes waterproof membrane damage that ripped the sheet during a typhoon.