An experimental investigation into failure mechanism of a full-scale 40m high steel telecommunication tower

Szafran, Jacek

doi:10.1016/j.engfailanal.2015.04.017

Cited by 18 publications

(8 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For structural design and analysis of lattice towers, the current industrial tools are finite element (FE) software packages combined with established design codes [3][4][5][6][7][8][9][10]. The majority of the work in published literature with regard to lattice towers concerns the analysis of electricity transmission towers [11][12][13][14][15][16][17][18][19]. For the purpose of the work presented here, electricity transmission towers are particularly interesting because they have a mode of loading similar to that of wind turbines.…”

Section: Lattice Towersmentioning

confidence: 99%

Structural assessment of a lattice tower for a small, multi-bladed wind turbine

Axisa

Muscat

Sant

et al. 2017

Int J Energy Environ Eng

View full text Add to dashboard Cite

This paper deals with a limit load assessment and preliminary experimental testing of a lattice-type steel tower used to support a newly designed, prototype small wind turbine having nine blades and a rotor diameter of 3.4 m. Small wind turbine and structural engineering codes of standards were followed with the purpose of implementing a system that meets European Union countries' legislation. The supporting lattice tower structure was subjected to a full-scale load test. This test verified that the structure can withstand the design loads. The finite element software ANSYS Mechanical was used to model and analyse the actual structure, and to determine the possible failure modes and their associated load levels. The most probable mode of failure for such a structure was found to be elastic buckling of the main corner posts. A number of finite element lattice tower models utilising different modelling strategies and solution methods are presented and analysed. The paper highlights the importance of using non-linear analyses as opposed to linear analyses and gives recommendations on the most reliable available modelling technique. Computational analyses' results are compared with measurements from a full-scale test on the tower structure.

show abstract

Section: Lattice Towersmentioning

confidence: 99%

Structural assessment of a lattice tower for a small, multi-bladed wind turbine

Axisa

Muscat

Sant

et al. 2017

Int J Energy Environ Eng

View full text Add to dashboard Cite

show abstract

“…Pre-loading process causes a load-sharing delay between reinforcing and original leg elements, but does not change the ultimate strength upgrade [73]. A progressive failure mechanism starts from increasing displacement to plastic hinge development, and finally to the buckling failure in leg elements [76,77]. In addition, the bolted connections quality and its properties such as plate thickness, bolts numbers and arrangements change the stiffness of bracing and leg members, which in turn affect the overall stability of the tower system, which is usually determined by the buckling resistance capacity of leg elements.…”

Section: Failure Modes Of Reinforced Ltts Under Static Loadsmentioning

confidence: 99%

Structural Analysis of Lattice Steel Transmission Towers: A Review

Chen¹,

Ou²

2016

J Steel Struct Constr

View full text Add to dashboard Cite

Lattice Transmission Towers (LTT) and the associated transmission line systems are important infrastructure in modern society. Due to the complicated load conditions and the nonlinear interaction among the large number of structural components, accurate structural analysis of the LTT systems has been a challenging topic for many years. Still today there are some gaps between research and industrial practice. This paper presents a summary of research outcomes from current literature. Recent developments in structural modelling and failure prediction technology are reviewed in terms of connection joints, individual members and structural systems subjected to static and dynamic loads. The advantages and disadvantages of different approaches have been compared. Finally, the knowledge gaps, associated challenges and possible research directions are highlighted.

show abstract

“…Gordziej-Zagórowska et al [ 24 ] determined the deformation forms and strains in the case of a truss system composed of bars with an open cross-section. The experiment-based reliability of multi-bolted structural connections in a steel lattice tower has been analysed by Szafran [ 25 ] and Szafran et al [ 26 ].…”

Section: Introductionmentioning

confidence: 99%

Experimental Studies of an Asymmetric Multi-Bolted Connection under Monotonic Loads

2021

View full text Add to dashboard Cite

This article describes the experimental studies of a preloaded asymmetric multi-bolted connection in the exploitation state. The construction of two stands were introduced: for bolt calibration and for evaluating the bolt forces in a multi-bolted connection. The bolts were tightened in a specific optimal sequence, in three passes, monitoring the force values in the bolts using a calibrated strain gauge measuring system. The studies were conducted for the selected multi-bolted connection on an Instron 8850 testing machine. The measurement data were saved in MATLAB R2018b Simulink. The measurement results were analysed statistically and are presented via charts showing the distributions of the normalised values of the bolt forces as a function of the linearly increasing and decreasing exploitation loads. We show that the forces in individual bolts, after unloading the multi-bolted connection, change in relation to the initial values of their preload.

show abstract

An experimental investigation into failure mechanism of a full-scale 40m high steel telecommunication tower

Cited by 18 publications

References 12 publications

Structural assessment of a lattice tower for a small, multi-bladed wind turbine

Structural assessment of a lattice tower for a small, multi-bladed wind turbine

Structural Analysis of Lattice Steel Transmission Towers: A Review

Experimental Studies of an Asymmetric Multi-Bolted Connection under Monotonic Loads

Contact Info

Product

Resources

About