Short-Term Failure Warning for Transmission Tower Under Land Subsidence Condition

Zhang, Li; Ruan, Jiangjun; Zhang, Du; Zhou, Wei; Li, Guannan; Gan, Yan

doi:10.1109/access.2020.2964426

Cited by 21 publications

(6 citation statements)

References 17 publications

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“…The towers are simulated by the BEAM188 element, which is a uniaxial element with tension, compression, torsion, and bending capabilities. The transmission wires are simulated by the LINK10 element with nonlinear, stress hardening and large deformation function [11] . The change of thermal stress of the conductor can be simulated by loading temperature load on the LINK10 element.…”

Section: 2finite Element Model Of the Transmission Line Systemmentioning

confidence: 99%

Sag-temperature characteristic analysis of stranded carbon fiber composite conductor based on finite element method

Feng,

Zhang,

Liao

et al. 2024

Ninth International Conference on Energy Materials and Electrical Engineering (ICEMEE 2023)

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As a new type of augmented capacity conductor, the current standards on sag-temperature characteristic is not applicable to the carbon fiber composite conductor. This paper proposed a method for analyzing the sag-temperature characteristics of stranded carbon fiber composite conductor based on finite element method. A 3D finite element model of the conductor system has been established. Considering the inflection point temperature, the method of calculating the conductor sag at different temperatures was given, and experiments were carried out to verify the results. Finally, the sag-temperature characteristics under different span and conductor type have been analyzed. The simulation results show that the inflection point temperature and the range of sag with temperature increases with the increase of the span. The cross-sectional area of the conductor has an effect on the variation range of the sag, but has no effect on the variation rate of the sag with temperature and the inflection point temperature.The research results of this paper has practical engineering significance for the dynamic capacity increase and design of the stranded carbon fiber composite conductor.

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Section: 2finite Element Model Of the Transmission Line Systemmentioning

confidence: 99%

Sag-temperature characteristic analysis of stranded carbon fiber composite conductor based on finite element method

Feng,

Zhang,

Liao

et al. 2024

Ninth International Conference on Energy Materials and Electrical Engineering (ICEMEE 2023)

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“…All transmission towers use cross arm components as extended structure arms that are connected directly to the cage to support the electrical utility cables [ 39 , 40 ]. They are regarded as essential components of the sub-structure of a transmission tower made of latticed steel and they help to keep the insulator and cable attached to the body of the power tower at a specific height above the ground [ 41 ]. The cross arms have various shapes and sizes depending on their location and electrical voltage supply.…”

Section: Cross Arm Components In Latticed Transmission Towersmentioning

confidence: 99%

Creep Properties and Analysis of Cross Arms’ Materials and Structures in Latticed Transmission Towers: Current Progress and Future Perspectives

et al. 2023

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Fibre-reinforced polymer (FRP) composites have been selected as an alternative to conventional wooden timber cross arms. The advantages of FRP composites include a high strength-to-weight ratio, lightweight, ease of production, as well as optimal mechanical performance. Since a non-conductive cross arm structure is exposed to constant loading for a very long time, creep is one of the main factors that cause structural failure. In this state, the structure experiences creep deformation, which can result in serviceability problems, stress redistribution, pre-stress loss, and the failure of structural elements. These issues can be resolved by assessing the creep trends and properties of the structure, which can forecast its serviceability and long-term mechanical performance. Hence, the principles, approaches, and characteristics of creep are used to comprehend and analyse the behaviour of wood and composite cantilever structures under long-term loads. The development of appropriate creep methods and approaches to non-conductive cross arm construction is given particular attention in this literature review, including suitable mitigation strategies such as sleeve installation, the addition of bracing systems, and the inclusion of cross arm beams in the core structure. Thus, this article delivers a state-of-the-art review of creep properties, as well as an analysis of non-conductive cross arm structures using experimental approaches. Additionally, this review highlights future developments and progress in cross arm studies.

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“…When this method solves the reliability, it first needs to obtain the reliability functional function Z. To effectively assess whether the transmission tower is damaged under icing and galloping conditions [14], the existing engineering usually adopts the analysis method based on the reliability of the transmission tower [15]. When the method solves the reliability, firstly, the functional function Z of the reliability needs to be obtained.…”

Section: Vibration Failure Mechanism Of Plug-in Foundation Iron Tower...mentioning

confidence: 99%

“…According to the reference [7], the value of [β] can be determined, so that χM can be solved using equation (14). After the values of the 2 parameters χM and ωn are determined, the mean value μZ and the standard deviation σZ of the functional function Z can be obtained according to equation (1) as:…”

Section: Reliability Solution Of Plug-in Foundation Iron Towermentioning

confidence: 99%

The Effect of Soil-Structure Interaction on Vibration Reliability of Transmission Line

Lin¹,

Li²,

Zhen³

et al. 2022

IEEE Access

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Since the main material of the plug-in foundation transmission tower legs is directly connected to the foundation, the traditional reliability calculation method is no longer accurate. For this reason, this paper considers the soil-structure interaction between the foundation soil and the tower legs, replaces the upper limit of the natural circular frequency and frequency ratio of the original iron tower with the corresponding value after considering the SSI (Soil-Structure Interaction), and proposes a SSI-based insertion Analysis method of vibration reliability of type foundation iron tower. First, perform modal analysis to obtain the natural circular frequency of the tower considering SSI; then, according to the external load of the tower under the icing of the wire and the vibration displacement equation of the tower considering SSI, the expression of the comprehensive amplitude amplification factor of the tower is derived, and then the consideration is obtained. The upper limit value of the frequency ratio of SSI and the functional function; finally combined with the normal distribution to solve the problem, the vibration reliability of the plug-in foundation tower considering SSI is obtained. The proposed method has been applied in the analysis of a galloping accident on a line in Guangdong Province. The maximum reliability of the damaged 6-base plug-in foundation tower obtained by this method is 0.9713, which is less than the target reliability of 0.9993.

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Short-Term Failure Warning for Transmission Tower Under Land Subsidence Condition

Cited by 21 publications

References 17 publications

Sag-temperature characteristic analysis of stranded carbon fiber composite conductor based on finite element method

Sag-temperature characteristic analysis of stranded carbon fiber composite conductor based on finite element method

Creep Properties and Analysis of Cross Arms’ Materials and Structures in Latticed Transmission Towers: Current Progress and Future Perspectives

The Effect of Soil-Structure Interaction on Vibration Reliability of Transmission Line

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