Wind Tunnel Test For Wind Load Characteristics On Typical Low-rise Buildings Comblex In The Shore-side Area Of South China

China is a country with many typhoon hazard, especially in the southeast coastal regions of China which typhoon often visits. Hundreds and thousands of buildings are damaged or broken down by typhoon every year. which causes serious casualties and property loss. With the development of economy, economic loss caused by the typhoons has been increasing year by year . Previous wind disaster surveys indicate that the low-rise buildings destroyed in the disaster are particularly serious . Therefore, it is of great theoretical and practical significance to investigate the wind-load distribution characteristics of typical low-rise buildings by approach of wind tunnel tests in coastal regions of China,find out the corresponding wind-resistant countermeasure and greatly reduce casualties and property losses.First of all, this paper takes the typical"Down Tiger"building in the Chaozhou-Shantou area of Guangdong province as the experiment object, adopting wind tunnel test with synchronously measured pressure on the single and building complex rigidity model in STDX-1 boundary layer wind tunnel of Shantou University and study the wind pressure distribution under the condintion of with and without ridge and fastigium. Six groups of the same distance (86mm) at different positions interference experiment are carried out ,and three groups of the interference experiment are carried out at the narrow spacing distance (43mm) and the expansion spacing distance (129mm).The impact of wind pressure distribution by the surrounding buildings were analyzed.and the wind pressure of the typical points were compared.The test results indicate that the existence of the ridge and the fastigium significantly change the distributions of the wind pressure on the roof. which cause the maximum mean pressure are reduced by 26.7%and the peak pressure are decreased by 24.3%. Moreover,in the same size and same height of regular arrangement of low-rise building complex,the wind pressure on the building whitch in the middle of most peripheral is maximum,while the wind pressure of building at the center is relatively small due to blocked by the surrounding buildings.Secondly, the wind load characteristics of another typical low-rise complex houses models are studied with wind tunnel test which specific test conditions were the same as the "DownTigers" experiment, but with different spacing distance. The impacts of wind pressure distribution by different interference distance of the same position were analyzed. The results indicate that the spacing distance greatly influenced the wind pressure distribution on the roof and wall and average wind pressure coefficient, fluctuating wind pressure coefficient and the minimum pressure coefficient (absolute value) had a trend of increase as spacing distance increasing in certain wind directions.