Stress state and failure path of a tension tower in a transmission line under multiple loading conditions

Fu, Xing; Du, Wenlong; Li, Hong‐Nan; Dong, Zhi-Qian; Yang, Li-Dong

doi:10.1016/j.tws.2020.107012

Cited by 34 publications

(8 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…e height of the first mesh layer is set as 3.79 × 10 − 5 m to satisfy the condition that the nondimensional wall distance y + is less than 1 [18], and the iteration time step is 2 × 10 − 4 s.…”

Section: Case Verification and Suppression Mechanismmentioning

confidence: 99%

A New Radial Spoiler for Suppressing Vortex‐Induced Vibration of a Tubular Tower and Its Practical Design Method

Jiang

et al. 2021

Shock and Vibration

Self Cite

View full text Add to dashboard Cite

Circular section tubular members with smaller wind load shape coefficient and higher stability are widely used in ultra-high-voltage (UHV) transmission towers. However, the tubular members, especially those with a large slenderness ratio, are prone to vortex-induced vibration (VIV) within a specific wind speed range. The sustained vibration of members can easily cause fatigue failure of joints and threaten the operational safety of transmission lines. Consequently, a novel countermeasure for the VIV of tubular towers using a new type of radial spoiler is proposed, whose mechanism is to change the vortex shedding frequency by destroying the large-scale vortexes into small-scale vortexes. Then, the parametric analysis of different variables is carried out based on the orthogonal experiment and numerical simulation, including the height H and length B of the spoiler and the distance S between adjacent spoilers. The results show that the above three parameters all have significant influences on vortex shedding frequency. Additionally, a practical design method of the new radial spoiler is proposed, and the recommended values of H, B, and S are 1D∼2D, 1.5H∼3H, and 5D∼12.5D, respectively, where D is the diameter of the tubular member. Finally, a numerical verification of the suppression effects is carried out, demonstrating that the proposed quick design method is simple and reliable, which can be widely used in the VIV design of tubular towers.

show abstract

Section: Case Verification and Suppression Mechanismmentioning

confidence: 99%

A New Radial Spoiler for Suppressing Vortex‐Induced Vibration of a Tubular Tower and Its Practical Design Method

Jiang

et al. 2021

Shock and Vibration

Self Cite

View full text Add to dashboard Cite

show abstract

“…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

View full text Add to dashboard Cite

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.

show abstract

“…Fu and Li (2018) studied the failure paths of tower structures under wind load and identified all potential failure modes of the structures. Later, Fu et al (2020) studied the tension tower's stress state and failure path under multiple loading conditions. Shao and Billington (2020) studied the failure paths of concrete beams with different reinforcements under monotonic and cyclic loading.…”

Section: Introductionmentioning

confidence: 99%

Seismic behavior of MSCSS based on story drift and failure path

Fan

Zhang

Abdulhadi

et al. 2021

Lat. Am. j. solids struct.

View full text Add to dashboard Cite

Stress state and failure path of a tension tower in a transmission line under multiple loading conditions

Cited by 34 publications

References 28 publications

A New Radial Spoiler for Suppressing Vortex‐Induced Vibration of a Tubular Tower and Its Practical Design Method

A New Radial Spoiler for Suppressing Vortex‐Induced Vibration of a Tubular Tower and Its Practical Design Method

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

Seismic behavior of MSCSS based on story drift and failure path

Contact Info

Product

Resources

About