Performance assessment and collapse prediction of a latticed tension-type transmission tower

IF 2.2 4区工程技术 Q2 ENGINEERING, CIVIL

Structural Engineering and Mechanics Pub Date : 2021-01-01 DOI:10.12989/SEM.2021.80.1.015

Juncai Liu, Liqiang Tian, R. Ma, Bingian Zhang, Aiqiang Xin

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引用次数: 2

Abstract

This paper aims to provide a comprehensive performance assessment of a latticed tension-type transmission tower by performing both full-scale static tests and numerical simulations. In particular, a full-scale tension-type transmission tower was firstly constructed and tested for examining the performances under design loads and the ultimate capacity under an extreme wind load. The displacement and strain responses are investigated, and the failure process of the tension-type tower is presented. Numerical simulations are then performed in order to capture the failure process and estimate the bearing capacity of the experimental tower under the overload case. Moreover, Numerical simulations are also adopted to evaluate the influence of wind attack angles on the structural behavior of the tested tower. Experimental and numerical results demonstrate that this latticed tension-type transmission tower is designed with sufficient capacity to resist the design loads, and the buckling failures of the leg members at the bottom are the governing reason for the collapse of tower. In addition, the developed numerical model can accurately present the failure and structural response of the tension-type tower, and the influence of wind attack angles on the structural behavior is significant. This research is beneficial for improving the understanding on the bearing capacity and design of latticed tension-type transmission towers.

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格架张拉式输电塔性能评估及倒塌预测

本文旨在通过全尺寸静态试验和数值模拟，对一种网格张力型输电塔进行综合性能评估。特别地，首先建造了一个全尺寸的张力式输电塔，并对其进行了测试，以检查其在设计荷载下的性能和在极端风荷载下的极限承载力。研究了受拉式塔的位移响应和应变响应，给出了受拉式塔的破坏过程。然后进行了数值模拟，以捕捉破坏过程和估计超载情况下实验塔的承载力。此外，还采用数值模拟的方法评估了风攻角对试验塔结构性能的影响。试验和数值结果表明，该格构张拉式输电塔具有足够的抗设计荷载能力，塔身底部支腿构件的屈曲破坏是导致塔倒塌的主要原因。此外，所建立的数值模型能较准确地反映拉式塔的破坏和结构响应，并且风攻角对结构性能的影响显著。本文的研究有助于提高对格构张拉式输电塔承载力和设计的认识。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Structural Engineering and Mechanics 工程技术-工程：机械

CiteScore

3.80

自引率

18.20%

发文量

审稿时长

11 months

期刊介绍： The STRUCTURAL ENGINEERING AND MECHANICS, An International Journal, aims at: providing a major publication channel for structural engineering, wider distribution at more affordable subscription rates; faster reviewing and publication for manuscripts submitted; and a broad scope for wider participation. The main subject of the Journal is structural engineering concerned with aspects of mechanics. Areas covered by the Journal include: - Structural Mechanics - Design of Civil, Building and Mechanical Structures - Structural Optimization and Controls - Structural Safety and Reliability - New Structural Materials and Applications - Effects of Wind, Earthquake and Wave Loadings on Structures - Fluid-Structure and Soil-Structure Interactions - AI Application and Expert Systems in Structural Engineering. Submission of papers from practicing engineers is particularly encouraged.