Design wind loads for structural frames of flat long-span roofs: Gust loading factor for the beams supporting roofs

Yasushi Uematsu, Motohiko Yamada, Akinori Karasu

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

The primary purpose of this study is to provide simple formulas for estimating the design wind loads for the structural frames of flat long-span roofs considering their dynamic response to turbulent wind forces. This paper presents a discussion of the gust loading factor for beams supporting flat roofs. The first modal force acting on the beam was measured in two turbulent boundary layers for various beam locations and wind directions. Based on the experimental results, the gust loading factor, defined as the ratio of the maximum peak response to the mean response in a time duration, was computed. The effects of the following parameters on the gust loading factor are investigated: (i) turbulence intensity of the approaching flow, (ii) wind direction, (iii) span-to-height ratio of the building, and (iv) location of the beam. An empirical formula for the gust loading factor is provided as a function of these parameters as well as of the structural properties of the beam. The application of the formula to general conditions is also discussed.

Original languageEnglish
Pages (from-to)35-50
Number of pages16
JournalJournal of Wind Engineering and Industrial Aerodynamics
Volume66
Issue number1
DOIs
Publication statusPublished - 1997 Jan

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Renewable Energy, Sustainability and the Environment
  • Mechanical Engineering

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