Response of transmission lines to multiple support excitation

Ghobarah, A.; Aziz, Tarek S.; El-Attar, M.

doi:10.1016/s0141-0296(96)00020-x

Cited by 62 publications

(15 citation statements)

References 8 publications

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“…Then, fully non-stationary spectrum-compatible earthquakes are generated using eq. (16). A typical sample for each component is provided in Figure 7.…”

Section: T T T T T T T T T Tmentioning

confidence: 99%

“…On the other hand, it is well known that the spatial variability of earthquake ground motion can influence significantly the response of structures, especially if they are long and/or rigid. In this context, a number of contributions has been devoted to the study of the effects of spatial variability on various structures including buildings [1][2][3][4], bridges [5][6][7][8], arcs [9,10], dams [11], rigid foundations [12,13], pipelines [14,15], transmission lines [16], and nuclear power plants [17]. Readers could also refer to the monograph by Zerva [18] for an overview of the engineering applications in which ground motion spatial variability has been taken into account.…”

Section: Introductionmentioning

confidence: 99%

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A method for generating fully non-stationary and spectrum-compatible ground motion vector processes

Cacciola

Deodatis

2011

Soil Dynamics and Earthquake Engineering

138

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ABSTRACT:Earthquake ground motion spatial variability can influence significantly the response of certain structures. In order to accurately evaluate probabilistic characteristics of the seismic response of structures, the Monte Carlo simulation technique is still the only universal method of analysis when strong nonlinearities and input uncertainties are involved. Consequently, realizations of ground motion time histories taking into account both time and spatial variability need to be generated.Furthermore, for some design applications, the generated time histories must also satisfy the provision imposed by certain seismic codes stating that they have to be also response-spectrumcompatible. For these purposes, a spectral-representation-based methodology for generating fully non-stationary and spectrum-compatible ground motion vector processes at a number of locations on the ground surface is proposed in this paper. The simulated time histories do not require any iterations on the individual generated sample functions so that Gaussianity and prescribed coherence are suitably preserved. The methodology has also the advantage of providing the fully non-stationary and spectrum-compatible cross-spectral density matrix of the ground motion timehistories that can be used for reliability studies in an analytic stochastic fashion.2

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“…Then, fully non-stationary spectrum-compatible earthquakes are generated using eq. (16). A typical sample for each component is provided in Figure 7.…”

Section: T T T T T T T T T Tmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A method for generating fully non-stationary and spectrum-compatible ground motion vector processes

Cacciola

Deodatis

2011

Soil Dynamics and Earthquake Engineering

138

View full text Add to dashboard Cite

show abstract

“…The equation of motion of a sagging line under earthquake loading can be written in the following matrix form [7].…”

Section: Calculation Modelmentioning

confidence: 99%

Seismic Behaviour Analysis of Long Crossing Transmission Tower and Tower-Line System

Sun

Fu-gang

2010

2010 International Conference on Intelligent System Design and Engineering Application

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Dynamic characteristics and seismic response of long crossing transmission single tower and tower-line system were systematically studied by time-history analysis method. The different dynamic characteristics between the long crossing transmission single tower and tower-line system have been found and come up with some feasible suggestions. With practical engineering background, the seismic response differences of the displacement, torsion and axial force in main leg and web member of the single tower and tower-line system are studied. The results show that: Compared with the single tower, the main mode shapes of the tower-line system are almost equal, however, the fundamental period of the towerline system which takes the combined activate into consideration prolonged evidently. Meanwhile, it's also coupling vibration of line. In addition, the maximum nodes displacement of the single tower and tower-line system are relative to the nodes location. The torsion of tower-line system becomes much gentler than the single tower with the seismic travel time increases. Because of transmission line, the axial force of the tower-line system of the bottom of tower leg and web member at the stiffness sudden change are bigger than single tower.

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“…Study on the dynamic response of the high-voltage tower induced by tunnel blast excavation can be found in literature [18][19][20][21][22]. For example, Moon et al [23] studied experimentally the seismic behavior of a specific connection between the structural members of the transmission tower.…”

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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Response of transmission lines to multiple support excitation

Cited by 62 publications

References 8 publications

A method for generating fully non-stationary and spectrum-compatible ground motion vector processes

A method for generating fully non-stationary and spectrum-compatible ground motion vector processes

Seismic Behaviour Analysis of Long Crossing Transmission Tower and Tower-Line System

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

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