An improved rigid rod method for wind-induced swing response prediction of heavily iced transmission lines

Lou, Wenjuan; Zhang, Yue-long; Gu, Yi; Li, Gang; Bai, Hongyu; Huang, Mingfeng; Virk, Muhammad Shakeel; Bian, Rong

doi:10.1016/j.jweia.2023.105358

Cited by 7 publications

(3 citation statements)

References 22 publications

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“…In the frigid region, diurnal temperature variations engender deleterious effects on rigid materials such as concrete. These deleterious consequences are particularly manifest in the context of concrete road pavements, where they manifest as premature cracking, diminished wear resistance, and a concomitant reduction in load-bearing capacity [1][2][3]. Hence, these road pavements exhibit truncated operational lifespans and commensurately elevated maintenance expenditures.…”

Section: Introductionmentioning

confidence: 99%

The Effects of Hybrid Steel/Basalt Fibers on the Durability of Concrete Pavement against Freeze–Thaw Cycles

Yu,

Yi,

Zhang

et al. 2023

Materials

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Freeze–thaw (F-T) is one of the principal perils afflicting concrete pavements. A remedial strategy used during construction encompasses the integration of hybrid fibers into the concrete matrix. An extant research gap persists in elucidating the damage mechanism inherent in hybrid steel fiber (SF)- and basalt fiber (BF)-reinforced concrete subjected to F-T conditions. This paper empirically investigated the durability performance of hybrid fiber-reinforced concrete (HFRC) subjected to F-T cycles. The impact of SF/BF hybridization on mass loss, abrasion resistance, compressive strength, flexural strength, damaged layer thickness, and the relative dynamic modulus of elasticity (RDME) was examined. The damage mechanism was explored using micro-hardness and SEM analysis. The results indicate that incorporating hybrid SF/BF effectively enhances the F-T resistance of concrete and prolongs the service life of concrete pavement. The mechanisms underlying these trends can be traced back to robust bonding at the fiber/matrix interface. Randomly dispersed SFs and BFs contribute to forming a three-dimensional spatial structure within the concrete matrix, suppressing the expansion of internal cracks caused by accumulated hydrostatic pressure during the F-T cycle. This research outcome establishes a theoretical foundation for the application of HFRC to concrete pavements in cold regions.

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Section: Introductionmentioning

confidence: 99%

The Effects of Hybrid Steel/Basalt Fibers on the Durability of Concrete Pavement against Freeze–Thaw Cycles

Yu,

Yi,

Zhang

et al. 2023

Materials

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“…Most studies on power grids [3][4][5][6] have focused on transmission towers and transmission systems [7], while research related to TPs is limited. The distributions of TPs are usually linear with low safety redundancy [8].…”

Section: Introductionmentioning

confidence: 99%

Bearing Capacity of Transmission Poles under Combined Wind and Rain Excitations Based on the Deep Learning Method

Liu

Wang

et al. 2023

Buildings

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Generally, only wind effect is considered in the collapse evaluation of transmission poles (TPs). However, during a typhoon landing, the rainfall is usually very heavy and the influence of the wind and rainfall should be considered simultaneously. To estimate the bearing capacity of TPs accurately during a typhoon, this paper proposes a method for predicting the water content distribution of soil based on the deep learning method. Then, the earth pressure distribution related to the rainfall is obtained. Furthermore, according to the static balance principle, the ultimate overturning moment of the TPs is obtained, and the corresponding critical wind speed is determined via a numerical simulation. Finally, a case study is tested and the collapse evaluation of TPs under the combined effects of wind and rainfall is obtained. The results show that the critical wind speed when considering rainfall is less than the value when ignoring the rainfall effect. The traditional method overestimates the structural safety of the TPs because the rainfall has a significant reduction on the bearing capacity of TPs.

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“…Wind deflection flashover caused by non-synchronous swing of phase conductor is one of the factors affecting the safe operation of transmission line. Compared with tripping faults caused by lightning and other reasons, although the occurrence frequency of wind deflection flashover is low, most of wind deflection flashover occurs under the working voltage, which generally cannot be successfully reclosed, resulting in a high probability of line outage [1][2]. For lines located in cold and strong wind areas, due to the need for on-site power supply, the long-term operation reliability of monitoring devices in low temperature environment is difficult to ensure.…”

Section: Introductionmentioning

confidence: 99%

Wind-induced deflection monitoring of overhead transmission lines in cold regions

Luo

Zhu

et al. 2022

Fifth International Conference on Mechatronics and Computer Technology Engineering (MCTE 2022)

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Wind-induced deflection of overhead transmission line is a phenomenon of conductor non-synchronous swing caused by strong wind. Serious wind deflection will cause flashover and lead to line trip. It is of great significance to strengthen the monitoring of wind deflection of transmission line insulator. For transmission lines located in cold and strong wind areas, due to the need for on-site power supply, the long-term operation reliability of monitoring devices in low temperature environment is difficult to ensure. The monitoring scheme based on Fiber Bragg grating technology has the advantages of no on-site power supply, anti-electromagnetic interference and good insulation performance. It has a good application prospect in wind deflection monitoring of transmission lines in cold areas. This paper analyzes the characteristics of wind load, the causes of wind deflection of transmission line, and introduces the basic principle of measuring insulator inclination when using fiber Bragg grating sensor, which provides technical support for wind deflection monitoring of transmission line in cold areas and ensures the structural safety, safe and stable operation of transmission line.

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An improved rigid rod method for wind-induced swing response prediction of heavily iced transmission lines

Cited by 7 publications

References 22 publications

The Effects of Hybrid Steel/Basalt Fibers on the Durability of Concrete Pavement against Freeze–Thaw Cycles

The Effects of Hybrid Steel/Basalt Fibers on the Durability of Concrete Pavement against Freeze–Thaw Cycles

Bearing Capacity of Transmission Poles under Combined Wind and Rain Excitations Based on the Deep Learning Method

Wind-induced deflection monitoring of overhead transmission lines in cold regions

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