Abstract:
The wind pressure distribution of a low-rise building model in three typical mountain terrains alone coastal area are studied by wind tunnel experiment. At the same time, comparison with the wind pressure distribution of low-rise building without surrounding buildings is presented. The study mainly focuses on the variation of average pressure coefficient and shape coefficient with the change of hillside slope under wind attack of 0°, then the trends of average wind pressure coefficients of low-rise building under wind attack of 0°~90° is analyzed. It is founded that the pressure distribution of low-rise building is affected by the slope of the mountain significantly, especially the leeward side; With the hillside slope increases, the average pressure increases gradually from negative to positive, shape coefficient of leeward roof many increase up to 250% compared with low-rise building without surrounding buildings. Some parts, such as windward midline, leeward roof and windward roof, should be paid more attention in the design because of their larger absolute value of the average pressure coefficient. There are some remarkable relationship between mean pressure coefficient under different wind angles and mountain environment. The most unfavorable wind angle of wind load calculations should be taken into consideration of the design for low-rise housing.