Research On Interference Effect Of High-rise Building On Wind Pressure Distribution Of Long-span Roof Structure

In the construction and development of modern cities,large public buildings such as large exhibition halls,transportation hubs and gymnasiums are often built in areas with dense high-rise buildings.The roof wind load distribution of these large public buildings will inevitably be affected by high-rise buildings and change.This paper mainly studies the interference effect of a single high-rise building on the wind load of a long-span roof through wind tunnel tests.In this paper,firstly,wind tunnel test of(single)large-span flat roof building in isolated state is conducted,and the distribution of average wind pressure coefficient,zonal average wind pressure coefficient,minimum wind pressure coefficient and partition minimum wind pressure coefficient distribution of single roof in different wind directions are studied.Then place the disturbance high-rise buildings upstream of the large-span flat roof building,study the changes of the relative position,wind direction angle and disturbance height of the buildings,the overall average wind pressure coefficient of the roof and the minimum wind pressure coefficient of the roof Research on interference effects.Then,according to the parameters of the average wind pressure of the partition and the interference factor of the minimum coefficient of the partition,the typical working conditions are selected for analysis.The main conclusions are: the 45° wind direction angle is the most unfavorable wind direction angle of the average wind pressure interference factor,For the maximum negative pressure interference factor,the "occlusion effect" is the main factor,and the slight amplification effect of the interference factor occurs at a wind direction angle of 45°.Finally,in this paper,combined with engineering examples,a single disturbance high-rise building was placed upstream of the relatively large-span roof with a relatively new structural form.The shape of the single high-rise building,the relative position of the high-rise building and the roof,and the wind direction angle were studied.Based on the influence of the wind load distribution on the cover,some rankings of the degree of influence on the interference factors are given.