Wind loads on roofing system and photovoltaic system nstalled parallel to flat roof

Tetsuo Yambe, Yasushi Uematsu, Kosuke Sato

研究成果: Paper査読

抄録

Mechanically-Attached waterproofing system has become popular in Japan. Being vulnerable to wind actions, especially to suctions, this roofing system is often damaged by strong winds. Similarly, photovoltaic (PV) systems installed on flat roofs are often damaged by strong winds, because the PV panels are subjected to large wind forces in an adverse wind. In order to reduce such damage to both systems, the authors propose to install the PV panels parallel to the flat roof with gaps between them, which may reduce the net wind forces on the PV panels due to the effect of pressure equalization. In addition, the wind pressures acting on the waterproofing system will decrease significantly. The present paper investigates the validity of the above-mentioned idea. The wind pressures underneath the PV panels, called layer pressures , are evaluated by a numerical simulation using the unsteady Bernoulli equation together with the time history of external pressures measured at many locations on the rooftop of a flat-roofed building model in a turbulent boundary layer. The results clearly indicate a significant reduction of wind forces acting on the PV panels as well as on the waterproofing system. The use of PV panels for reducing the wind pressures on waterproofing system is quite effective to the corner region of the roof, where very large suctions are induced in a diagonal wind.

本文言語English
出版ステータスPublished - 2020
イベント3rd European and Mediterranean Structural Engineering and Construction Conference 2020, Euro-Med-Sec 2020 - Limassol, Cyprus
継続期間: 2020 8 32020 8 8

Conference

Conference3rd European and Mediterranean Structural Engineering and Construction Conference 2020, Euro-Med-Sec 2020
国/地域Cyprus
CityLimassol
Period20/8/320/8/8

ASJC Scopus subject areas

  • 建築および建設
  • 土木構造工学

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