Wind pressure loading cycles for evaluating the wind resistance of mechanically attached waterproofing systems on flat roofs

Y. Uematsu, S. Nakamura, M. Sera

Research output: Contribution to conferencePaperpeer-review

Abstract

Recently, mechanically attached single-ply roofing has become popular for flat-roofed buildings in Japan. The roof membrane is either welded or glued to circular disks, which are arranged in a grid pattern and mechanically fastened to the roof deck by screws. The fastener spacing ranges from 0.45 to 0.6 m, depending on the roof zone. High suctions are induced in the corner and edge zones by the generation of conical vortices in oblique winds. Fluctuating pressures may cause fatigue damage to the fixation elements. When designing such roofing systems, it is important to evaluate the dynamic effects of wind loading appropriately. Furthermore, flat roofs generally have parapets, which affect the roof pressures significantly. Many researchers have studied the effect of parapets on the peak pressure coefficients. However, few studies have been made of the effect on the fatigue-related characteristics of wind pressures so far. The present paper first outlines a fatigue test on a mechanically attached single-ply roofing system commonly used in Japan, and then describes the characteristics of fluctuating wind pressures on flat roofs with parapets, based on a series of wind tunnel experiments. A discussion is made of the wind pressure loading cycles for evaluating the wind resistance of the waterproofing system. A wind pressure loading cycle model, named 'TS-WiLMARS' (Tohoku University and Sumitomo Bakelite-Wind Load Model for Mechanically Attached Roofing Systems), is proposed.

Original languageEnglish
Publication statusPublished - 2009
Event5th European and African Conference on Wind Engineering, EACWE 5 - Florence, Italy
Duration: 2009 Jul 192009 Jul 23

Other

Other5th European and African Conference on Wind Engineering, EACWE 5
CountryItaly
CityFlorence
Period09/7/1909/7/23

Keywords

  • Fatigue
  • Flat roof
  • Loading cycle
  • Waterproofing system
  • Wind tunnel experiment

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment

Fingerprint Dive into the research topics of 'Wind pressure loading cycles for evaluating the wind resistance of mechanically attached waterproofing systems on flat roofs'. Together they form a unique fingerprint.

Cite this