This study experimentally investigates the pressure distribution on the surface of low-rise buildings with different roof angle.

• Main Authors: Zheng-Zhan Xie, 謝正展
• Other Authors: Chu,C.R.
• Format: Others
• Language: zh-TW
• Published: 2002
• Online Access: http://ndltd.ncl.edu.tw/handle/73093339689386470405

碩士 === 國立中央大學 === 土木工程研究所 === 90 === Abstract This study experimentally investigates the pressure distribution on the surface of low-rise buildings with different roof angle (15o,20o and 30o). The experiments were carried out in an atmospheric boundary layer wind tunnel. Instantaneous fluctuating wind pressures were measured by an electronic pressure scanner. Based on the pressure measurement, the distributions of mean, rms Cprms and peak pressure Cpp can be calculated. It was found that the mean pressure coefficient on the front roof surface change from negative to positive while the roof angle change from 15 o to 30o. The critical angle is close to 20o, which is in good agreement with previous studies. The pressure coefficient, Cp10, could be calculated by the formula, Cp10 = Cp + g10‧Cprms, where the peak factor g10 = 1.23, which is independent of the building shape and position. Experimental results also revealed that the probability of pressure fluctuations on the front surface are closed to the Gaussian distribution. On the other hand, the leeward side was skewed and did not necessary follow Gaussian distribution.