【摘要】 采用刚性模型风洞试验和内、外层幕墙同步测压技术对矩形建筑的风荷载和阵风系数的分布规律进行详细研究,探讨了内、外层幕墙在不同气流流动区域内的风荷载大小关系.结果表明,涡脱落产生的强大吸力无论是平均风压还是脉动风压均主要作用在外幕墙上,而气流附着及气流碰撞产生的压力主要作用在内幕墙上;双层幕墙的阵风系数随测点和风向角的变化较大,平均风压越小,阵风系数越大,但对于在控制风向角下的最大瞬时风压,其内、外层幕墙的阵风系数均与规范值十分接近。根据试验结果,提出了矩形双层幕墙建筑的内、外层幕墙墙面和墙角体型系数的建议值.更多还原

【Abstract】 Based on rigid model tests in wind tunnel and synchronous manometric method on internal and external facades,wind pressure and gust factor distribution on double-skin facades of rectangle building was analyzed emphatically,and comparison of wind load between internal and external facades in different airflow zones was discussed.Results showed that suction,including mean value and pulsating quantity of wind pressure,aroused by vortex shedding mostly acts on external facades,while compression force aroused by air-flow adhesion and collision mostly acts on internal facades.Double-skin facade’s gust factor changes largely as variation of facade’s region or wind direction.If mean wind pressure coefficient is smaller,gust factor will be larger.But gust factors of internal and external facades are near to the value on code(GB50009-2001) when instantaneous pressure coefficient maximizes at control azimuth.According to the results, wall face and corner’s body coefficients of internal and external facades on double-skin facades of high-rise building with rectangular shape were advised.更多还原