Scholarlink

<p>This investigation proposes an analysis methodology that can accurately simulate the coupled behaviour between transmission line cables and towers when subjected to nondeterministic wind loadings, with the aim of assessing the displacements and forces in steel towers. In this research, a transmission line system composed of towers, conductors, shield wires and insulators was studied. The transmission line system presents two spans of 450&#xa0;m, featuring a 32.86&#xa0;m high central suspension steel tower and two towers at the ends. The analysis was conducted by using finite element modelling, with the wind dynamic characteristics taken into account. The wind loads were modelled as an aleatory process based on their statistical properties, considering 30 nondeterministic series of seven different wind basic velocities. The results of this research show relevant quantitative differences associated with the force and displacement values when the lattice steel towers’ structural response was calculated on the basis of a static linear analysis and a geometric nonlinear and nondeterministic dynamic analysis. The structural design of a base leg member was developed, showing that structural failure may occur at higher wind velocities. Comparisons among the studied numerical models reveal increases of up to 95% in translational displacements at the top of the tower, 93% in compression forces related to a base leg member and 95% associated with the member force ratio.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Assessment of the Structural Behaviour of Lattice Steel Towers Utilised in Power Transmission Lines when Subjected To Wind Loads

  • 期刊论文

  • 发表日期：

    2025年12月22日

查看全文
  • Mariana Souza Rechtman,
  • José Guilherme Santos da Silva

摘要

This investigation proposes an analysis methodology that can accurately simulate the coupled behaviour between transmission line cables and towers when subjected to nondeterministic wind loadings, with the aim of assessing the displacements and forces in steel towers. In this research, a transmission line system composed of towers, conductors, shield wires and insulators was studied. The transmission line system presents two spans of 450 m, featuring a 32.86 m high central suspension steel tower and two towers at the ends. The analysis was conducted by using finite element modelling, with the wind dynamic characteristics taken into account. The wind loads were modelled as an aleatory process based on their statistical properties, considering 30 nondeterministic series of seven different wind basic velocities. The results of this research show relevant quantitative differences associated with the force and displacement values when the lattice steel towers’ structural response was calculated on the basis of a static linear analysis and a geometric nonlinear and nondeterministic dynamic analysis. The structural design of a base leg member was developed, showing that structural failure may occur at higher wind velocities. Comparisons among the studied numerical models reveal increases of up to 95% in translational displacements at the top of the tower, 93% in compression forces related to a base leg member and 95% associated with the member force ratio.