Research on wind tunnel test and group wind effect of cable structure gymnasium in coastal area
For two types of roofs(upper convex and concave),four roof structures(single-layer saddle-shaped cable net,spoke-type double-layer cable net,cable dome,string-supported dome),two test models with scale ratios of 1:250 and 1:200 were designed and produced,and 60 sets of model wind tunnel tests were carried out under category B landforms,and distribution law of wind pressure peaks of the two types of roof structures under the full wind direction were explored.The influence law of different wind angles and neighboring buildings on the wind pressure characteristics of target buildings was analyzed.The results show that the peak of negative wind pressure on the windward side of the two types of roofs is the largest,when there is no influence from neighboring buildings in the downflow direction of the full wind angle,which is about 3.0 times and 1.5 times higher than that in the middle area of the upper convex and concave roofs respectively.Wind pressure peak in the middle area of the roof is evenly distributed,and the negative wind pressure is the main load,and only the positive wind pressure appears in the middle of the concave roof.Wind direction angle is opposite to the roof.The influence of wind pressure distribution is mainly reflected in the interference of adjacent buildings.Its influence on the average roof and fluctuating wind pressure coefficient is the largest when the flow direction is not adjacent to the building,the flow direction is second when the flow direction is adjacent to the building,and the wake direction is close.The probability distribution of wind pressure at the point of roof upwind has obvious non Gaussian characteristics and has a maximum negative pressure value.The wind pressure distribution of the middle and tail points has typical normal distribution characteristics.
cable rooflarge-span structurewind tunnel testfull wind direction anglegroup wind effect
NETL
NSTL
万方数据
维普
