隙間流れにPoiseuilleの法則を適用した低層建築物の風による室内庄のシミュレーション

摘要

建築物の風災害報告には、屋根葺き材や外壁仕上げ材並びに屋根骨組などの被災事例が数多く見受けられ、る1）。また、建築物の屋内を仕切る間仕切り壁が強風で被災した事例なども報告されている2）。外装仕上げ材や屋根骨組、更には間仕切り壁などが強風によって被災する要因の1つとして、材の裏側に作用する内圧や室内側に作用する室内圧に関する情報の不足が考えられる。%This paper describes a method of numerically simulating the internal pressures of low-rise buildings with multiple rooms that are caused by the wind. The coefficient of discharge for leak flows through external and partition walls in this study is determined by using the Poiseuille's law. This study shows that the internal pressure properties obtained using the proposed simulation method correspond well to measurements taken in a wind tunnel experiment conducted using internal pressure models. The Reynolds number and discharge coefficient characteristics of leak flows through external and partition walls are analyzed based on the validity of the simulations. The mean Reynolds number value of the leak flows through external and partition walls was smaller than the transition Reynolds number for the transition from laminar to turbulent flow.