Abstract:Wind tunnel tests on single-stand and parallel-arranged large-span coal sheds with porous gables were carried out to investigate the effects of gable porosity on the overall wind load coefficients, wind load shape coefficients, and peak wind pressure coefficients of the coal sheds. The results have shown that, with the increment of the gable porosity, the flow exchange through the porous gables can effective alleviate the significant wind suctions on the gables, roof edges and top ventilators induced by the separation flows. Moreover, negative pressure inner the coal shed was formed due to the gable ventilation, which led to the increment of positive wind pressure on the upwind area of the roof and the amplification of positive peak wind pressure coefficients. Influenced by the neighbor coal shed, the wind pressure distribution patterns of parallel-arranged double coal sheds were distinguished with those of single-stand coal sheds particularly on the neighboring half-spans. The most unfavorable overall wind load coefficients of the roof for parallel-arranged double coal sheds can be enveloped by those of single-stand cases. However, the peak wind pressure coefficients moved towards the positive direction. As a conclusion, the zone wind load shape coefficients and peak wind pressure coefficients were summarized from the wind tunnel data for the reference of engineering application.
苏宁,彭士涛,洪宁宁. 山墙疏透率对并列布置双煤棚风荷载的影响[J]. 振动与冲击, 2021, 40(22): 275-282.
SU Ning, PENG Shitao, HONG Ningning. Effects of gable porosity on wind loads on parallel-arranged double coal sheds. JOURNAL OF VIBRATION AND SHOCK, 2021, 40(22): 275-282.
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