IMPACT OF RESEARCH ON DEVELOPMENT OF LARGE COOLING-TOWERS
IMPACT OF RESEARCH ON DEVELOPMENT OF LARGE COOLING-TOWERS
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DOI：
10.1016/0141-0296(86)90023-4
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发表时间：
1986-04-01
影响因子：
5.5
通讯作者：
ZERNA, W
中科院分区：
文献类型：
--
作者：
NIEMANN, HJ;ZERNA, W
在过去的二十年中，冷却塔的快速发展只能通过对结构方面的基础研究，对风致力的评估和屈曲行为。为了获得足够精确的壳体应力，采用了不同的计算方法。在轴对称载荷下对模型进行的屈曲试验以及风洞试验中，可以最好地了解屈曲行为。风荷载的研究主要集中在由阵风和涡分离引起的动力效应以及干扰效应上。子午线的形状影响的应力状态和屈曲行为显着。因此，冷却塔的形状优化问题越来越受到重视。然而，随着尺寸的增加，壳体的加强对于最佳设计可能是必要的。在这种情况下，加强环被证明是最有效的。施工方法：允许冷却塔壳体以高精度安装是至关重要的，并且在将来，需要更加关注钢筋混凝土壳体的耐久性。
The rapid development of cooling towers during the last two decades has only been possible through fundamental research on structural aspects, on assessment of wind induced forces, and on buckling behaviour. Different computation techniques exist which were developed to obtain the shell stresses with sufficient accuracy. The buckling behaviour can best be understood in buckling tests carried out on models under axisymmetric loading and also in wind tunnels. Wind load research has focused on the dynamic effects induced by wind gustiness and vortex separation, and on interference effects. The shape of the meridian influences the stress state and the buckling behaviour substantially. Therefore, more emphasis has been devoted to the optimization of the cooling tower shape. With increasing sizes, however, stiffening of the shell may be necessary for an optimal design. In this case, stiffening rings proved to be the most effective. The method of construction: allowing the erection of the cooling tower shell with a high accuracy is of vital importance and in the future, more attention needs to be paid to the durability of the reinforced concrete shell.