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横膈是保证多边形格构式塔整体空间稳定必不可少的构件,当前有关技术文件对横膈面设置间隔和横膈设置形式要求不一。利用有限元软件SAP2000建立了不同横膈面设置间隔、不同横膈形式的角钢通信塔架整体模型,进行了各塔型模态在风荷载作用下主要受力构件的应力比和塔架用钢量的对比分析。研究表明:在无变坡的塔段中可适当增大横膈面设置间隔,且可用预应力柔性交叉横膈替代刚性横膈布置在横膈面。
The diaphragm is an essential component to ensure the overall space stability of the polygonal lattice tower. Currently, the relevant technical documents have different requirements on the setting of the diaphragmatic surface and the setting of the diaphragm. The finite element software SAP2000 was used to establish the whole model of the angle steel communication tower with different diaphragmatic spacing and different diaphragms. The stress ratio of the main force members and the tower steel Comparative analysis of the amount. The research shows that the spacing between the diaphragms can be increased appropriately in the non-changing slope sections, and the rigid diaphragms can be replaced by the prestressed flexible cross diaphragms.