Experimental study on multi-panel retrofitted steel transmission towers

Mills, Julie E.; Ma, Xing; Zhuge, Yan

doi:10.1016/j.jcsr.2012.06.004

Cited by 41 publications

(12 citation statements)

References 14 publications

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“…Because of their characteristics, including their geometric nonlinearity and closely spaced modes of vibration, the dynamic behavior of transmission lines has significant effects on the wind-induced vibration response of transmission towers. Damage to highvoltage overhead transmission lines caused by environmental impacts, especially by wind-induced vibration, has been an important issue for engineers and researchers in the power industry throughout the world [1][2][3][4][5][6][7][8]. Since the introduction of the first high-voltage transmission lines, this issue has been studied continually, but reasonable solutions have not yet been obtained.…”

Section: Introductionmentioning

confidence: 99%

Wind-Induced Coupling Vibration Effects of High-Voltage Transmission Tower-Line Systems

Zhang

Zhao

Wang

et al. 2017

Shock and Vibration

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A three-dimensional finite element model of a 500 kV high-voltage transmission tower-line coupling system is built using ANSYS software and verified with field-measured data. The dynamic responses of the tower-line system under different wind speeds and directions are analyzed and compared with the design code. The results indicate that wind speed plays an important role in the tower-line coupling effect. Under the low wind speed, the coupling effect is less obvious and can be neglected. With increased wind speed, the coupling effect on the responses of the tower gradually becomes prominent, possibly resulting in the risk of premature failure of the tower-line system. The designs based on the quasi-static method stipulated in the current design code are unsafe because of the ignorance of the adverse impacts of coupling vibration on the transmission towers. In practical engineering, when the quasi-static method is still used in design, the results for the design wind speed should be multiplied by the corresponding tower-line coupling effect amplifying coefficient .

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Section: Introductionmentioning

confidence: 99%

Wind-Induced Coupling Vibration Effects of High-Voltage Transmission Tower-Line Systems

Zhang

Zhao

Wang

et al. 2017

Shock and Vibration

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“…Experimental investigations building on Temple's work in 2005-2008 [4,5] on the interconnector types and bolt number effects indicated that the eight-bolt cruciform connection was the most effective load-transferring mechanism between original members and reinforcing members. Further experimental research on retrofitted tower models [6] verified that reinforcing members with cruciform connections increased the load-carrying capacity of a tower system most effectively. The arrangement of bolted cruciform connections and the number of reinforcing panels influence the load-sharing rate in reinforced members and the resultant structural performance.…”

Section: Introductionmentioning

confidence: 93%

“…To investigate the effectiveness of retrofitting configurations and the effects of pre-loading, five types of scaled triangular steel lattice tower rigs were constructed and tested [6]. The triangular configuration simulated one quarter of a tower, with the top chord simulating one of the four main legs of a standard tower configuration.…”

Section: Test Tower and Set-upmentioning

confidence: 99%

Modeling of retrofitted steel transmission towers

Mills

2015

Journal of Constructional Steel Research

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“…This method is most effective for leg member elements with slenderness ratios (l/r) below about 100 [73]. Reinforced members with two interconnectors at the ¼ and the ¾ position in a leg element have an optimum ultimate strength capacity [51].…”

Section: Failure Modes Of Reinforced Ltts Under Static Loadsmentioning

confidence: 99%

“…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].…”

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

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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.

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Experimental study on multi-panel retrofitted steel transmission towers

Cited by 41 publications

References 14 publications

Wind-Induced Coupling Vibration Effects of High-Voltage Transmission Tower-Line Systems

Wind-Induced Coupling Vibration Effects of High-Voltage Transmission Tower-Line Systems

Modeling of retrofitted steel transmission towers

Structural Analysis of Lattice Steel Transmission Towers: A Review

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