Cyclic loading test of friction-type reinforcing members upgrading wind-resistant performance of transmission towers

Park, Jihun; Moon, Byoung-Wook; Kang, Min; Lee, Sung-Kyung; Kim, Chee Kyeong

doi:10.1016/j.engstruct.2007.03.022

Cited by 25 publications

(14 citation statements)

References 9 publications

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“…Although it is possible to acquire dynamic property and wind-induced response of the tower by theoretical calculation [1][2][3][4][5], vibration test is of important value. Since structure of actual tower is complicated, simplified model is applied in the analysis and calculation.…”

Section: Introductionmentioning

confidence: 99%

Online Monitoring of Wind-Induced Vibration of Transmission Steel High Tower

Yang¹,

Zebing²,

Yu³

2011

2011 Asia-Pacific Power and Energy Engineering Conference

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For transmission steel high tower, wind-induced vibration is significantly increased because of its high height and flexibility. Long-term vibration may damage tower and conductor. Thus, it is necessary to enhance ability of supervision the vibration and take measures to control it to allowable extent. In the paper, a method to achieve wind-induced vibration characteristics of high tower is studied using technologies of environmental incentive of wind load and wireless sensor acquisition and transmission signals. Monitoring device and sensor are designed to acquire meteorological environment parameters and tower vibratory responses. Parameters of tower vibration are analyzed and determined based on a monitoring system. The technologies are used for monitoring the wind-induced vibration of a large-span steel tubular high tower. It is demonstrated that the technologies put forward are practicable and suitable for field working condition, and present good effects.

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Section: Introductionmentioning

confidence: 99%

Online Monitoring of Wind-Induced Vibration of Transmission Steel High Tower

Yang¹,

Zebing²,

Yu³

2011

2011 Asia-Pacific Power and Energy Engineering Conference

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“…Two outer plates and the bearing structure are joined together, whereas the middle plate is connected to the cable [7]. Similar devices commonly consist in stainless steel plates, although also brass plates have stable dynamic behaviour under cyclical loading conditions [17]. The parameter able to describe their dynamic behaviour is the sliding force F s .…”

Section: Fe Modeling Of the Façade Equipped By Dissipative Devicesmentioning

confidence: 99%

Dynamic Response of Cable-Supported Façades Subjected to High-Level Air Blast Loads: Numerical Simulations and Mitigation Techniques

Amadio

2012

Modelling and Simulation in Engineering

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A glazing façade subjected to blast loads has a structural behaviour that strongly differs from the typical response of a glazing system subjected to ordinary loads. Consequently, sophisticated modelling techniques are required to identify correctly its criticalities. The paper investigates the behaviour of a cable-supported façade subjected to high-level blast loading. Nonlinear dynamic analyses are performed in ABAQUS/Explicit using a sophisticated FE-model (M01), calibrated to dynamic experimental and numerical results. The structural effects of the total design blast impulse, as well as only its positive phase, are analyzed. At the same time, the possible cracking of glass panels is taken into account, since this phenomenon could modify the response of the entire façade. Finally, deep investigations are dedicated to the bearing cables, since subjecting them to elevated axial forces and their collapse could compromise the integrity of the cladding wall. Based on results of previous studies, frictional devices differently applied at their ends are presented to improve the response of the façade under the impact of a high-level explosion. Structural effects of various solutions are highlighted through dynamic simulations. Single vertical devices, if appropriately calibrated, allow reducing significantly the axial forces in cables, and lightly the tensile stresses in glass panes.

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“…However, the transmission tower-line system generally has low frequencies and damping ratios associated with their fundamental oscillation modes, and when subjected to wind loads, it may experience large amplitudes of oscillation [1]. Recent investigations have reported several tower failures due to strong wind excitations [2,3]. Failures of the transmission tower-line system may cause massive blackouts, resulting in major direct and indirect consequences on the economy and national security [4].…”

Section: Introductionmentioning

confidence: 99%

“…Conventional techniques aim at increasing the stiffness of the transmission tower by enlarging the cross-section area of the steel members or shortening the effective member length by adding additional members. These methods will tremendously increase the project cost and thus are not financially acceptable [2]. An alternative approach to prevent the catastrophic damage of transmission tower is to install vibration control devices [5,6].…”

Section: Introductionmentioning

confidence: 99%

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Control of Wind-Induced Vibration of Transmission Tower-Line System by Using a Spring Pendulum

Zhang

Ren

et al. 2015

Mathematical Problems in Engineering

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The high-voltage power transmission tower-line system, which is a high flexible structure, is very susceptible to the wind-induced vibrations. This paper proposes the utilization of the internal resonance feature of the spring pendulum to reduce the wind-induced vibration of a transmission tower. The kinetic expression of the spring pendulum system is obtained through Lagrangian equation. The condition of the internal resonance is verified to be = 2, in which is the ratio of the spring mode frequency over the pendulum mode frequency. A 55 m tower in the Liaoning province is established in SAP2000 to numerically verify the effectiveness of the proposed device. The spring pendulum is modeled using Link element. The wind speed history is generated based on Kaimal spectrum using harmonic superposition method. Results show that, (1) compared with the suspended mass pendulum, the spring pendulum absorbs more energy and reduces the oscillation more effectively and (2) the vibration control performance of the proposed spring pendulum improves as the external wind load increases.

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Cyclic loading test of friction-type reinforcing members upgrading wind-resistant performance of transmission towers

Cited by 25 publications

References 9 publications

Online Monitoring of Wind-Induced Vibration of Transmission Steel High Tower

Online Monitoring of Wind-Induced Vibration of Transmission Steel High Tower

Dynamic Response of Cable-Supported Façades Subjected to High-Level Air Blast Loads: Numerical Simulations and Mitigation Techniques

Control of Wind-Induced Vibration of Transmission Tower-Line System by Using a Spring Pendulum

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