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

Zhao, Tengfei; Yan, Hong; He, Panpan; Zhang, Lei; Lan, Zhiwen; Huang, Mojia

doi:10.3390/app112412024

Cited by 4 publications

(3 citation statements)

References 29 publications

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“…According to the energy method [40,41], the condition for stationary potential energy is dE P da = 0. We can obtain the expression for the critical load.…”

Section: Ultimate Load-carrying Capacity Of Ttssmentioning

confidence: 99%

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Theoretical and Numerical Simulation Study on the Ultimate Load Capacity of Triangular and Quadrilateral Truss Structures

Wang,

Qiu,

Yuan

et al. 2024

Buildings

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Spatial truss structures (STSs), serving as the bottom support structure of a cooling tower, effectively harness the superior load-bearing capacity offered by lattice-type truss structures. STSs are composed of main bars, diagonal bars, and horizontal bars, with horizontal bars serving as vital components of the truss structure. They play a pivotal role in maintaining the overall integrity and stability of the structure. The proportional relationship between the stiffness of each bar in STSs has a profound impact on the mechanical characteristics of the overall structure. This relationship directly influences the ultimate load-bearing capacity of the structure. Therefore, conducting research on the influence patterns of this relationship is of utmost importance. This paper explores the study of triangular truss structures (TTSs) and quadrilateral truss structures (QTSs). Firstly, through theoretical analysis, considering structural elements such as the stiffness of the horizontal bars, the number of layers in the truss, and the angle between the diagonal bars and the horizontal bars, theoretical expressions for the calculation of the ultimate load capacity of TTSs and QTSs are derived. Furthermore, a parametric finite element (FE) model was established for the TTSs and QTSs. Through numerical simulations, the validity of the theoretical calculation expressions was verified. Finally, this paper discusses the influence of factors such as the stiffness of the horizontal bars, the number of layers in the truss, and the angle between the diagonal and horizontal bars on the TTSs and QTSs. It analyzes the patterns and trends of these influences. The research results indicate that the theoretical and numerical simulation results for the TTSs have an error ranging from 0.40% to 4.93%, while the relative error for the QTSs ranges from 1.59% to 4.88%. These errors are within an acceptable range for engineering calculations. As the stiffness of the horizontal bars increases, the proportionality coefficient of the truss’s ultimate load capacity shows an initial increase followed by a stable trend. It reaches an equilibrium state when the stiffness of the horizontal bars reaches a certain threshold. As the number of layers in the truss and the angle between the diagonal and horizontal bars increase, the proportionality coefficient of the load capacity gradually decreases. The research findings provide a theoretical basis for the application of TTSs and QTSs in cooling towers.

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“…According to the energy method [40,41], the condition for stationary potential energy is dE P da = 0. We can obtain the expression for the critical load.…”

Section: Ultimate Load-carrying Capacity Of Ttssmentioning

confidence: 99%

“…According to the energy method [40,41], the calculation expression for the critical load of the QTS is derived as…”

Section: Ultimate Load-carrying Capacity Of Qtssmentioning

confidence: 99%

Theoretical and Numerical Simulation Study on the Ultimate Load Capacity of Triangular and Quadrilateral Truss Structures

Wang,

Qiu,

Yuan

et al. 2024

Buildings

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“…Te length L of the insulator string is 10 m, and the section diameter d is 0.04 m. According to the theoretical analysis [36,37], the critical force P cr of the composite core rod buckling in compression is…”

Section: Te Eigenvalue Buckling Analysis Of the Insulator Stringmentioning

confidence: 99%

Nonlinear Buckling Analysis and Optimization Design of the Y‐Type Composite Insulator String

Bao¹,

Xia

Chai³

et al. 2022

Advances in Civil Engineering

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Under the action of extreme wind load, the overhead transmission line will lead to the fracture of the traditional V-type insulator string, which greatly affects the safety of the power system. Compared with the V-type insulator string, the Y-type insulator string has better stability under the wind load. Therefore, the overhead lines in the mountainous areas of Anhui Province are taken as the research object, considering the combined effect of wind load and conductor dead weight, and through theoretical derivation, the calculation formula of insulator string wind deflection angle is obtained. Using numerical simulation software, the nonlinear mechanical analysis of Y-type insulator strings is conducted, and under the action of different wind speeds, the windage yaw angle and unloading angle of the Y-type insulator string are obtained. Compared with the calculation results of the V-type insulator string, the stability of the Y-type insulator string in the structure is better than that of the V-type insulator string, and the Y-type insulator string can make full use of the distance between layers and the gap margin of the tower head, reduce the length of the cross arm, and reduce the weight of the tower, which has obvious advantages. Combined with the results of theoretical analysis and numerical simulation, the optimal design method of the Y-type insulator string is given. Under the condition of ensuring the safety and stability of insulators, the distance of the cross arm is shortened as much as possible and the weight of the transmission line tower is reduced. The research results will provide a theoretical reference for engineering design and improvement.

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The history of tower structures: past and present

Veremeev

2024

Bulletin of Scientific Research Results

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Purpose: to make an analytical review of the existing literature and systematization by purpose in various eras of existence for tower structures, as well as to highlight the achievements of mankind in the development of steel lattice towers used as supports for radio-electronic equipment over the past 130 years. Methods: the method of analytical review of the evolution of tower structures from the initial stages of the development of society was used with a description of the vectors of development and expediency of the construction of these structures, followed by the conclusion of modern trends, especially aimed at the development of steel tower structures used for the support of radio equipment. Results: various review and analytical studies have been analyzed, which allow us to draw conclusions about the use of structures in the past and identify the global vector of development of tower structures in various cultures; a comprehensive assessment, analysis and formalization of information presented in the form of a concise overview was carried out, in addition, a comprehensive analysis of the development of steel lattice towers in domestic science of the USSR period was carried out, and modern trends in the development of steel lattice towers were reflected. The result of this work is a generalization of world and national research aimed at accumulating knowledge about the origin and vectors of future trends in the development of tower structures. Practical significance: the accumulation and analysis of existing knowledge about the history of the development of tower structures and their purpose in human economic and household activities in various epochs has been carried out. A systematic series of modern trends in the development of steel tower structures used as supports for radio-technical equipment is presented in order to determine the direction of future research.

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

Cited by 4 publications

References 29 publications

Theoretical and Numerical Simulation Study on the Ultimate Load Capacity of Triangular and Quadrilateral Truss Structures

Theoretical and Numerical Simulation Study on the Ultimate Load Capacity of Triangular and Quadrilateral Truss Structures

Nonlinear Buckling Analysis and Optimization Design of the Y‐Type Composite Insulator String

The history of tower structures: past and present

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