Abstract
Damages of mechanically-anchored waterproofing membrane system from strong wind have been occurring. Thus, this study provides investigation on the behavior of waterproofing sheets and fasteners exposed during typhoon, and the difference between the static pressure test and typhoon test. The polyvinyl chloride waterproofing membrane reinforced with polyester fiber was constructed on a flat roof with dimensions of 6 m by 6 m on the island of Miyako in Japan. At first, a pressure test was carried out by using a compressor. Afterwards, the response of waterproofing membrane system located atop a building when subjected to strong winds from a typhoon in 2009 was measured. Both axial force and lateral force of mechanically-anchored waterproofing membrane system were measured under high speed wind, and lateral force was significantly large. It is presumed that such lateral force causes waterproof membrane damage that ripped the sheet in the lateral direction as if in a typhoon. Next, this study provided the proposal of simple wind resistance test method for mechanically anchored waterproofing membrane system. At first, the pressure test on the flat roof of actual building was carried out to obtain basic data for wind resistance design of this system. As a result, Fastener’s force of waterproofing membrane was equivalent to the wind force. Then, the ring type specimen with 200 and 600 mm diameter was made, and the fatigue coefficient of this system after using 10 years was calculated by using the tension test and the SIGDERS test. Finally, the design method for fastener based on fatigue model was proposed in order to apply to construction system.
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Acknowledgments
The authors wish to thank Mr. Chea Daravuth and Mr. Yousuke Furusawa for their help with this project. This work was conducted as part of research activities of a working group for Assessment of Wind Endurance of Mechanically Anchored Waterproofing Membranes of the Waterproofing Membrane System of the Architectural Institute of Japan with the financial support of the following committee members: the Synthetic Polymeric Roofing Sheet Manufacturers Association (KRK), the Asphalt Waterproofing Manufacturers Association (ARK), the Torch-Applied Roofing Manufacturers Association (TRK), and fastener manufacturers. This work was supported by KAKENHI (20360249, Grant-in-Aid for Scientific Research (B)) in Japan, and Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology (2010-0011927). Some researchers were supported by Brain Korea 2nd (BK21) funded by the Korean Government. We are grateful to all these parties for their support.
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Miyauchi, H., Michal, B., Katou, N., Tanaka, K. (2013). Wind Resistance Evaluation to Dynamic Response of Mechanically Anchored Waterproofing Membrane System. In: de Freitas, V., Delgado, J. (eds) Hygrothermal Behavior, Building Pathology and Durability. Building Pathology and Rehabilitation, vol 1. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-31158-1_10
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DOI: https://doi.org/10.1007/978-3-642-31158-1_10
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