作　　者： ; ; (夏波文）;

机构地区： 同济大学土木工程学院土木工程防灾国家重点实验室

出　　处： 《土木工程学报》 2015年第S1期53-57,共5页

摘　　要： 基于上海浦东国际机场附近的同济大学实测基地获取的2014年台风"浣熊"影响下的近地风速时程和低矮双坡屋面风压同步实测数据,研究了台风影响下的近地风特性和低矮房屋屋面风压特性。10m高度处实测风速结果表明:纵向的湍流度随平均风速的增大呈减小的趋势,而横向和竖向的湍流度随平均风速的变化趋势不明显。坡角为10°的足尺低矮房屋在"浣熊"影响下,由于屋脊对斜风向来流的气动分离作用,在背风屋面右侧靠近屋脊的位置出现了明显的漩涡脱落,而斜风向下山墙和屋脊的共同作用也导致了第二个旋涡的产生;旋涡处的脉动风压系数峰值随着风向角度的增加呈逐渐增大的趋势,并且也随纵向湍流度的增大而增大。 The near-ground wind speed time histories and wind pressures on a double slope roof of a full-scale low-rise building under typhoon 'Neoguri' in 2014 were simultaneously monitored and studied at the Tongji field measurement base near Shanghai Pudong International Airport. The results of wind speeds measured at a height of 10 m show that the longitudinal turbulence intensity decreases with the increase of the average wind speeds, while the variations in the horizontal and vertical ones are not significant. For a low-rise building of 10° roof pitch under typhoon 'Neoguri', vortexes appear at the right leeward roof near the ridge due to the effect of aerodynamic separation of the house ridge to the oblique wind flow, and the gables and the ridges lead to the second vortex. Peak fluctuating pressure coefficients at these vortexes increase with the wind direction angles increase, which increase with an increase of the longitudinal turbulence intensity.

关 键 词： 台风 浣熊 低矮房屋 现场实测 阵风因子 湍流度 脉动压力系数

领　　域： [建筑科学]