State of the art review of wind induced vibration and its control on transmission towers

Roy, Swabarna; Kundu, Chinmay Kumar

doi:10.1016/j.istruc.2020.11.015

Cited by 33 publications

(12 citation statements)

References 48 publications

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“…The findings for single seismic events show that the near-field ground motion is more destructive than far-field ground motion as aforementioned by some researchers [29,47]. Similarly, repetitive earthquakes are more damaging and intense than both seismic scenarios related to far-field and near-field.…”

Section: Incremental Dynamic Analysis (Ida)mentioning

confidence: 57%

Quantification of the Seismic Behavior of a Steel Transmission Tower Subjected to Single and Repeated Seismic Excitations Using Vulnerability Function and Collapse Margin Ratio

et al. 2022

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Transmission towers are a vital lifeline for modern living and are crucial structures that must remain operational even after a seismic event. However, the towers are largely designed to withstand the effects of wind alone and not earthquakes, and the seismic influences on tower design and construction have hitherto been ignored. The purpose of this study was to evaluate the seismic performance of a latticed steel transmission tower-line system that is subjected to a variety of seismic situations (Far-Field, Near-Field and Repeated Earthquakes) using probabilistic vulnerability functions and Collapse Margin Ratios in accordance with FEMA-P695. Nonlinear Time History Analyses were performed by incorporating an array of 36 strong ground motions to develop the Incremental Dynamic Analysis and to generate the fragility functions for three performance limit states as referenced in FEMA 356. The results showed that the single event seismic performance of the tower is better than its performance after multiple ground motions owing to aftershock impact, while near-field excitations led to greater susceptibility and fragility than far-field scenarios. Thus, near-field ground motion is more harmful to the tower and could result in its failure or collapse with only a small reduction in damage relative to the impact of the aftershock.

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Section: Incremental Dynamic Analysis (Ida)mentioning

confidence: 57%

Quantification of the Seismic Behavior of a Steel Transmission Tower Subjected to Single and Repeated Seismic Excitations Using Vulnerability Function and Collapse Margin Ratio

et al. 2022

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“…Transmission tower belongs to the category of high-rise structure which has flexible stiffness and is very sensitive to wind load effect [4,5]. For high-rise structures with complex shape and high height, it is necessary to consider not only the downwind wind load but also the vortex caused by the flow effect under the crosswind load or even temperature effect [6][7][8]. e alternating vortex shedding generates the pulsating loads, and when it is close to the natural frequency of the structure, it will lead to crosswind vortex-induced resonance (VIR), which would do tremendous harm to the transmission tower [9].…”

Section: Introductionmentioning

confidence: 99%

“…So far, the research on the impact of mountain wind on structures is still in its infancy. Most of the researches are mainly focused on the mountain wind field characteristics [6][7][8] and established microclimate analysis system over complex terrain by using numerical simulation methods such as turbulence model and finite volume method in order to predict local weather conditions [10]. Kikuchi et al modified the terrain factor, which is related to the wind direction variation, and proposed the terrain change coefficient to represent the difference of terrain factors [11].…”

Section: Introductionmentioning

confidence: 99%

Wind Field Characteristics of Butte and the Influence on the Wind-Induced Responses of Transmission Towers

Zhang

Huang

Wang

2022

Advances in Materials Science and Engineering

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The computational fluid dynamics (CFD) simulation on the butte was carried out to obtain the wind field characteristics for a specific mountain in the hilly area of eastern China. Then, the speed-up ratios of butte at each location distributed by height were calculated. The simulation results were compared with the specified value of mountain wind field acceleration ratio in various codes. The finite element model of the transmission tower line system is established by ANSYS, and the wind-induced vibration response of the structural system under the single mountain wind field is calculated, which is compared with the results of flat ground. The results show that the mountain will hinder the fluid passing through it. There is a deceleration zone in front of the mountain and a flow separation phenomenon behind the mountain. The speed-up ratios at the butte top where accelerating effect are the biggest among all positions of the butte. As the height increases, they approach 1. The speed-up ratios calculated by the Chinese code and the Australian code are linearly changing along the ridge of the butte and are symmetric at the windward side and leeward side. The biggest speed-up ratios are calculated by the Chinese code, and the smallest ratios are calculated by CFD. The wind-induced vibration response of the transmission tower line system is influenced by the wind speed-up ratios and reaches the maximum at the top of the butte. The simulation results at the windward side are close to the values calculated by the Australia code and the Euro code, but at the top and leeward side, they are far smaller than others.

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“…With the increasing energy demand worldwide, the development of power technology plays an important driving role [1,2]. As an important carrier of power transmission, the transmission line system, and the transmission tower is the skeleton of the transmission line system, the safety and stability of its structure will directly affect the normal operation of the power system [3][4][5][6]. In the traditional transmission tower structure design, the space truss method with hinged joints is often used to calculate the internal force of the tower, without considering the impact of joint stiffness on the transmission tower structure, which may have potential safety hazards and material waste.…”

Section: Introductionmentioning

confidence: 99%

Influence of Double-Limb Double-Plate Connection on Stable Bearing Capacity of Quadrilateral Transmission Tower

Zhao

Yan

et al. 2021

Applied Sciences

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Transmission tower connection joint is an important connection component of the tower leg member and diagonal member. Its axial stiffness directly affects the stable bearing capacity of a transmission tower. The axial stiffness of the joint is mainly related to the connection form of joint. This paper takes the double-limb double-plate connection joint as the research object. Through the comparative study with the single-limb single-plate connection joint, the influence law of single-limb single-plate and double-limb double-plate joint on stable bearing capacity of quadrilateral transmission tower is studied from three aspects of model test, theoretical analysis and numerical simulation. Through the scale model test, it is found that the elastic stiffness of the double-limb double-plate joint is 3.12 times that of the single-limb single-plate joint, which can increase the bearing capacity of the joint by 26.1%. Through the energy method, the theoretical calculation expression of the stable bearing capacity of the quadrilateral tower considering the influence of the axial stiffness of the joint is derived. Compared with the effect of the single-limb single-plate connection joint, the double-limb double-plate joint can improve the stable bearing capacity of the quadrilateral tower by 15.6%. Considering the influence of geometric nonlinearity of tower and connecting joint, it is found that the double-limb double-plate connecting joint can improve the nonlinear stability bearing capacity of a transmission tower by 14.9%. The results show that the double-limb double-plate connection joint can not only improve the bearing capacity of the joint, but also greatly improve the stable bearing capacity of the tower. The research results can provide reference for the engineering application and design of double-limb double-plate connection joints.

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State of the art review of wind induced vibration and its control on transmission towers

Cited by 33 publications

References 48 publications

Quantification of the Seismic Behavior of a Steel Transmission Tower Subjected to Single and Repeated Seismic Excitations Using Vulnerability Function and Collapse Margin Ratio

Quantification of the Seismic Behavior of a Steel Transmission Tower Subjected to Single and Repeated Seismic Excitations Using Vulnerability Function and Collapse Margin Ratio

Wind Field Characteristics of Butte and the Influence on the Wind-Induced Responses of Transmission Towers

Influence of Double-Limb Double-Plate Connection on Stable Bearing Capacity of Quadrilateral Transmission Tower

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