本研究以風洞實驗的方式，探討邊界層流中矩形高層建築物表面的壓力分佈情形。實驗使用電子式壓力掃描器，可同時量測多個位置的瞬時壓力，由實驗結果可計算得建築物表面的平均、擾動和最大壓力分佈。實驗條件包括單棟及雙棟並排垂直於風向的流況。單棟之結果十分接近前人之研究成果；雙棟並排之結果顯示：當雙棟建築之間距逐漸減少時，建築物的相鄰面上風處分離點附近的負壓和擾動壓力值隨之而增大，而最大擾動風壓發生處會隨著間距比增大而往下風方向移動。由壓力頻譜可找出渦漩逸散之頻率及史徹荷數，當間距比縮小時，史徹荷數增大，顯示渦散頻率增加。本研究並建議以最大壓力前10%之壓力係數Cp10作為設計風壓係數，工程設計上較經濟可行。Cp10可用平均壓力係數Cp，加上擾動壓力係數Cprms與尖峰因子g10的乘積表示。尖峰因子不受到建築物位置的影響，g10約為1.3。本研究之結果可作為相關研究之參考，並提供工程設計時的建議。 This study experimentally investigates the pressure distribution on the surface of high-rise buildings. The experiments were carried out in atmospheric boundary layer wind tunnel. The experimental conditions include single building and two side-by-side buildings with different gap ratios. The electronic pressure scanner can measure the fluctuating wind pressures of 64 pressure taps simultaneously. Based on the pressure measurement, the mean, rms and peak pressure distributions can be evaluated. On the confronted side face, the negative pressure and rms pressure near the separation point increase as the gap ratio decreases. And the point of maximum rms pressure moves leeward as gap ratio increases. This study suggests the pressure coefficient Cp10, which is based on of 10% maximum pressure, for the cladding design. The pressure coefficient Cp10 could be calculated by the formula Cp10 = Cp + g10．Cprms, where the peak factor g10 = 1.3, and is independent of position.
