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为计算大跨屋盖多目标等效静力风荷载,采用约束加权最小二乘方法,设基本向量为完全三分量单目标等效静力风荷载,推导了一种完全三分量多目标等效静力风荷载方法。以一个开孔屋盖为例,进行了刚性模型测压风洞试验,研究了该屋盖的单目标和多目标等效静力风荷载。结果表明:单目标和多目标等效静力风荷载的分布形状相似,多目标等效结果大于单目标等效结果;采用单目标等效静力风荷载方法,精确等效节点的等效位移与实际位移完全相等,但其它等效节点的等效位移明显偏离实际位移,最大误差可达72.1%;而完全三分量多目标等效静力风荷载方法下的其它等效节点的等效位移与实际位移相差较小,最大误差仅为6.1%,适合大跨屋盖等效静力风荷载的多目标等效。
In order to calculate the multi-objective equivalent static wind load of a long-span roof, a constrained-weighted least squares method is used and the basic vector is a complete three-component single objective equivalent static wind load. A complete three-component multi-objective equivalent Static wind load method. Taking a perforated roof as an example, a rigid model pressure wind tunnel test was carried out and the uniaxial and multi-objective equivalent static wind loads of the roof were studied. The results show that the distributions of single-objective and multi-objective equivalent static wind loads are similar, the multi-objective equivalent results are larger than the single-objective equivalent results. Equivalent static displacement of single-objective equivalent static wind loads Which is exactly equal to the actual displacement. However, the equivalent displacements of other equivalent nodes obviously deviate from the actual displacements, the maximum error is up to 72.1%. The equivalent displacements of other equivalent nodes under the full three-component multi-objective equivalent static wind load method The difference from the actual displacement is small, the maximum error is only 6.1%, which is suitable for multi-objective equivalent of long-span roof equivalent static wind load.