高層建築物の外装材を対象とした風力に関する研究(その1) : 平均室内圧の性状について

Abstract

The characteristics of wind-induced internal pressures in a high-rise building have been investigated. Full-scale measurements were taken using absolute pressure meters, which allowed high-resolution measurements. This paper outlines full-scale measurements of wind velocity, wind direction and external and internal pressures on a twenty-nine-story building, commencing in January 1993. It also describes the characteristics of natural wind above the building's penthouse and mean wind-induced internal pressures measured in September 1995 when Typhoon No.12 hit the Kanto area. The internal pressure coefficients obtained from these measurements were about -0.26, and were constant over the building's height. The influence of internal walls and doors on measured mean internal pressure coefficients was found to be insignificant, and roughly the same values were obtained at different locations on the same floor. The mean internal pressure coefficient estimated from the mean wind pressure coefficient obtained from wind tunnel testing was -0.26, which was the same as that obtained from the full-scale measurement. Therefore, it is inferred that the mean wind pressure coefficient obtained from the wind tunnel testing is sufficient for examining average internal pressures.