Seismic Response of Power Transmission Tower‐Line System Subjected to Spatially Varying Ground Motions

Tian, Li; Li, Hong‐Nan; Liu, Guohuan

doi:10.1155/2010/587317

Cited by 23 publications

(15 citation statements)

References 8 publications

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“…However, it is unrealistic to use a model that includes all towers and lines. Here, the used model contains three towers and four-span lines, which was verified to be reasonable (Shen et al [17]; Tian et al [18]). The schematic view of the model is shown in Figure 4, in which the conductors and towers are connected with insulators and the materials for conductor and ground wire are steel-cored aluminium strand.…”

Section: Description Of the Selected Structurementioning

confidence: 80%

Progressive Collapse Analysis of Transmission Tower-Line System Under Earthquake

Wang¹,

Li²,

Tian³

2013

Volume 9 Number 2

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High-voltage electric transmission tower may collapse under the strong earthquake and studies on the collapse mechanism, routine and capacity of transmission tower-line system are important for the structural design of tower. In this paper, a progressive collapse analytical procedure for the system is proposed based on the finite element method (FEM). During this procedure, the mass of the elements is still retained rather than removal after elements lose the load-bearing capacity. The proposed procedure is coded using the user subroutine VUMAT and then implemented in the advanced finite element program ABAQUS. A three-dimensional finite element model for the system of three towers and four-span lines is created. By using the coded subroutine, the collapse analysis of the tower-line system under the strong earthquake is performed. Collapse processes along longitudinal and lateral direction are studied, respectively. Furthermore, the influences of ultimate strain and strain rate effect of materials on the collapse mode and capacity are studied. The results indicate that the collapse analysis of the tower-line system by using the proposed procedure can provide collapse mode and vulnerable points for use in seismic performance and retrofit evaluation of structure. It is found from the numerical modeling that the influences of ground motion and ultimate strain on the collapse modes are apparent. The collapse-resistant capacity of system increases remarkably with the increase of ultimate strain and influences of strain rate on collapse routine and capacity are tiny in analytical results.

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Section: Description Of the Selected Structurementioning

confidence: 80%

Progressive Collapse Analysis of Transmission Tower-Line System Under Earthquake

Wang¹,

Li²,

Tian³

2013

Volume 9 Number 2

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“…There are 20 transmission lines including 12 transmission conductors and 8 ground lines. As shown in Figure 6, the transmission towerline coupled system includes three towers (1 # tower, 2 # tower, and 3 # tower) and four-span line (Span 1, Span 2, Span 3, and Span 4), and the side spans of the lines are hinged at the same height of middle tower [14]. The spans of adjacent towers are all 425 m.…”

Section: Modeling Of Power Transmission Tower-line Systemmentioning

confidence: 99%

Study on Seismic Control of Power Transmission Tower-Line Coupled System under Multicomponent Excitations

Tian

2013

Mathematical Problems in Engineering

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The seismic control of power transmission tower-line coupled system subjected to multicomponent excitations is studied in this paper. The schematic of tuned mass damper is introduced, and equations of motion of a system with tuned mass damper under multi-component excitations are proposed. Three-dimensional finite tower-line system models are created based on practical engineering in studying the response of this system without and with control. The time domain analysis takes into account geometric nonlinearity due to finite deformation. The optimal design of the transmission tower-line system with tuned mass damper is obtained according to different mass ratio. The effects of wave travel, coherency loss, and different site conditions on the system without and with control are investigated, respectively.

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“…Some studies [24][25][26][27] evaluated the vibration damage to transmission towers based on the finite element method. Tian et al [28] investigated the effect of the types of connections used for the transmission cables and the effect of direction and the spatial variability of the earthquake on the seismic behavior of transmission towers. Luo et al [29] analyzed the dynamic characteristic of the tunnel for surface explosion of 100 and 300 kg TNT charge, respectively, according to features of the Nanjing metro tunnel in sandy soil.…”

Section: Introductionmentioning

confidence: 99%

Vibration Characteristic of High‐Voltage Tower Influenced by Adjacent Tunnel Blasting Construction

Duan

Lin

Lai

et al. 2019

Shock and Vibration

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e effects of tunnel blast excavation on the adjacent existing high-voltage tower are comprehensively studied for the Chashan highway tunnel project as a case study. To investigate the effect of blast-induced vibration from the tunnel on the adjacent existing tower, field tests and numerical simulations method were adopted to study the vibration velocity and vibration frequency of the existing tower. Moreover, the relationship between the transverse distance from the detonation center and the peak velocity is discussed in detail. e results showed that the peak velocity of the measuring point in tower foundation increases with the distance between the detonation center and tower foundation approaches, and the maximum velocity is appearing when detonation center is 0 m. Furthermore, the corresponding energy spectrum distributions of the existing tower under the effect of blast induced by vibration is also analyzed, and the main frequency of vertical vibration is generally higher than that of transverse vibration. On combining the peak velocity with the main frequency and the natural frequency of the tower, the safety evaluation of the blasting area is proposed, and the corresponding control measures of blasting vibration are put forward. A guideline for the blast safety zone is proposed based on vibration velocity, main frequency, and the quantity of explosive.

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Seismic Response of Power Transmission Tower‐Line System Subjected to Spatially Varying Ground Motions

Cited by 23 publications

References 8 publications

Progressive Collapse Analysis of Transmission Tower-Line System Under Earthquake

Progressive Collapse Analysis of Transmission Tower-Line System Under Earthquake

Study on Seismic Control of Power Transmission Tower-Line Coupled System under Multicomponent Excitations

Vibration Characteristic of High‐Voltage Tower Influenced by Adjacent Tunnel Blasting Construction

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