Field Measurements and Wind Tunnel Tests of Wind Effects on a Low-rise Building
|Low-rise housing Typhoon Wind load characteristics Field measurements of the full-size Wind tunnel test Wind farm Local wind pressure Peak wind pressure Shape coefficient
Our country is a hurricane active and the cyclone affected one of the big countries, such as in 2008, the 14th strong typhoon Hagupit Dianbai in Guangdong Province, the coastal landing \$, of low houses damaged or collapsed $ 27,700. The hurricane statistics show that the hurricane loss is mainly caused by the destruction or collapse of the low-rise housing, local wind pressure in the corner of the roof of the low-rise housing, edge and ridge area larger than the roof mean wind more hurricane in these parts also the first damage causing the destruction of the building as a whole, it is necessary to understand the variation of the low-rise housing roof peak wind pressure distribution and wind pressure pulsation. The our wind load characteristics of low-rise housing (especially full-size field measurement) is basically a blank, although the average wind vector coefficient of load specification for low-rise housing is required, but do not consider the geometry of the building, the roof slope angle factors and wind angles, especially related to the low-rise housing in the extreme under the ethos Hou environment of typhoons and other roofing local wind pressure coefficient values ??as well as the local wind pressure pulsation. In recent years, global warming caused by the number and strength of the hurricane has increased year by year, so carried out for low-rise housing under different wind farm in China's coastal areas, especially in the role of Strong Wind Field under wind load characteristics of low-rise housing, is our Structural Wind Engineering an urgent and important issue. Based on size than 1.5:1:1 (length: width: height) of low-rise housing wind tunnel test data, analysis of low-rise housing in 9 different slope angle windward roof houses in five different wind wind farm environment along the roof and other local area measuring point average, pulsating and peak wind pressure coefficient. At different slope angles by contrast such low housing roof under different wind directions, the wind pressure variation, summed up the influence of slope angle and direction of local wind pressure on the roof of the low-rise housing. Based the prototype measured room low-rise housing construction in Guangdong Province Dianbai Coast, the success of the 0814 strong typhoon Hagupit \The storm \The low the housing wind load characteristics measured study mainly from the following two aspects: the first part of the analysis of the measured average wind speed of the wind, turbulence intensity, gust factor, fluctuating velocity spectra and turbulence integral scale wind characteristic parameters, study Measured room near ground wind field conditions, the measured strong typhoon, typhoons, tropical storms and monsoon wind characteristics; the second part, the wind pressure measured data captured using the measured room the surface layout measuring point to different wind direction, wind speed and turbulence intensity parameters as variables, focusing on analysis of low-rise housing windward roof houses along the local measuring point average, pulsating and extreme value wind pressure coefficient variation, and summed up the roof shape coefficients corresponding wind field conditions. The pressure chart expression the same time, using a different wind farm under roofing average, pulsating and extreme value wind pressure coefficient distribution law. The measured room aspect points to the midline wind pressure distribution law, and to explore the roof houses along the representative points of the wind pressure spectrum corresponding wind speed spectrum. Based on the scale ratio of 1:10 of the low-rise housing wind tunnel test model, wind speed and turbulence intensity parameters of the wind farm, to Expand Wind tunnel tests of surface wind pressure distribution pattern of low-rise housing. Try to reproduce the measured wind farm test wind load conditions for low-rise housing model in the wind tunnel, compared with the measured data to test the reliability of the wind tunnel test methods, and to explore the existing problems in the wind tunnel tests. In view of this article on the full-size house in the coastal environment typhoon wind field measured in wind-resistant design is still innovative research at home and abroad, and its results will improve low-rise housing in China provide a valuable reference.