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Simple method for static and dynamic analyses of guyed towers

机译:拉杆塔静,动力分析的简单方法

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摘要

The static and dynamic responses of guyed telecommunication towers can be determined by using two models, the space truss element model, and the equivalent beam-column element model. The equivalent beam-column analysis is based on the determination of the equivalent shear, torsion, and bending rigidities as well as the equivalent area of the guyed mast. In the literature, two methods are currently available to determine the equivalent properties of lattice structures, namely: the unit load method, and the energy approach. In this study, an equivalent beam-column analysis is introduced based on an equivalent thin plate approach for lattice structures. A finite-element modeling, using suitably modified ABAQUS software, is used to investigate the accuracy of utilizing the different proposed methods in determining the static and dynamic responses of a guyed tower of 364.5-meter high subjected to static and seismic loading conditions. The results from these analyses are compared to those obtained from a finite-element modeling of the actual structure using 3-D truss and beam elements. Good agreement is shown between the different proposed beam-column models, and the model of the actual structure. However, the proposed equivalent thin plate approach is simpler to apply than the other two approaches.
机译:牵拉式电信塔的静态和动态响应可以通过使用两个模型来确定,即空间桁架单元模型和等效的梁柱单元模型。等效梁柱分析基于确定等效抗剪,扭转和弯曲刚度以及拉杆的等效面积。在文献中,目前有两种方法可用于确定晶格结构的等效属性,即:单位载荷法和能量法。在这项研究中,基于等效薄板方法对晶格结构进行了等效梁柱分析。使用经过适当修改的ABAQUS软件进行有限元建模,以研究利用不同的拟议方法确定364.5米高的静力和地震荷载条件下的拉力塔静,动力响应的准确性。将这些分析的结果与使用3-D桁架和梁单元对实际结构进行有限元建模获得的结果进行比较。在建议的不同梁柱模型与实际结构模型之间显示出良好的一致性。但是,提出的等效薄板方法比其他两种方法更易于应用。

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