STATIC BEHAVIOUR ANALYSIS OF MASTS WITH COMBINED GUYS

Donatas Jatulis,Algirdas Juozapaitis,Zenonas Kamaitis

doi:10.3846/13923730.2007.9636435

Donatas Jatulis, Algirdas Juozapaitis + Show 1 more

Open Access

https://doi.org/10.3846/13923730.2007.9636435

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Abstract

The purpose of this study was to develop a new type of guyed mast that incorporates a complex guy cable system with a particular focus on the effect of static loading on the response mast behaviour. The intension of such solution is to increase a number of elastic supports for the mast shaft that will impact on its stability under loading. The static analysis of a one‐level guyed mast has been undertaken. The effects of geometrical and physical design parameters on the displacements of the mast were determined. The analysis is illustrated with two‐guyed masts: the bending moments and lateral displacements were determined for a typical guyed mast and guyed mast with combined guys.

Highlights

Guyed masts are special structures widely used for wireless broadcasting and communications industries
A guyed mast consists of a vertical tall mast laterally supported at several levels along its height by sets of inclined pre-tensioned guys spaced at equal angles around the mast and attached to discrete foundations
The solution of suspension system with main and secondary guys to increase a number of elastic supports for the mast shaft has been proposed by the authors of the present paper [12]

Summary

Introduction

Guyed masts are special structures widely used for wireless broadcasting and communications industries. The structural analysis of a guyed mast is complex, because of non-linear behaviour of structural system and the random nature of the loads. For a guyed mast wind and ice are the major loads. To increase stability of mast structures and to control vibrations, special measures are sometimes taken. Between them a mast shaft of pre-stressed truss system or guy systems consisting of series of guys with horizontal elements [9], special dampers [10], and star mounts [11] can be mentioned. The solution of suspension system with main and secondary guys to increase a number of elastic supports for the mast shaft has been proposed by the authors of the present paper [12]. The effects of different geometrical and physical design parameters on the lateral displacements of the mast were investigated. The paper is illustrated with a numerical simulation and comparison of typical and proposed guyed masts

Description of structure

FE modelling of displacements

Comparison with typical mast

Conclusions