Operational Post Deformation of Cantilever Sign Support Structures from Truck-Induced Wind Gusts

Hosch, Ian E.; Fouad, Fouad H.; Gallow, Mohammed; Traylor, Lonny

doi:10.1061/(asce)sc.1943-5576.0000352

Cited by 3 publications

(1 citation statement)

References 6 publications

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“…Wind turbines, towers, and foundations belong to high-rise structures, which need to withstand complex external environmental loads during their operation, and face problems such as structure vibration [6][7][8][9][10], soil-structure coupled vibration [11], seismic dynamic response [12,13], and vibration reduction control [14][15][16]. Offshore wind turbines, especially, have to face many challenges in complex ocean environments, including waves, currents, and erosion.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Torsion Resistance of Foundation Ring Land-Based Wind Power Expanded Foundation Scale Model

et al. 2020

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In this paper, an experimental torsion resistance-loading system for wind power extended foundation scale models is taken as the research object, and four 1:3 scale model specimens of the foundation ring are tested. The transmission mechanism of torque load in the extended foundation was analyzed, and the proportion of each part bearing the torque load was calculated. Test results showed that when the torque load was small, the torque load transmitted from the upper part was mainly borne by the sidewall adhesion force, as well as the top radial reinforcement. In contrast, the torque load was gradually borne by the anchor flange of the foundation ring in the case of a large torque load. At the middle and late stages of torque loading, the top radial reinforcement of the foundation shared about 20% of the torque load, while the bottom flange of the foundation ring shared about 80%. The torque load is most sensitive to changes in the size of the bottom flange but not sensitive to those in the embedded depth of the foundation ring or in the strength of the foundation concrete.

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Section: Introductionmentioning

confidence: 99%

Experimental Study on Torsion Resistance of Foundation Ring Land-Based Wind Power Expanded Foundation Scale Model

et al. 2020

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Vibration Control Effect Analysis of PTMD in Wind Turbine Tower Under Multi-Hazard Action of Earthquake and Vortex-Induced Wind

Zhao,

Lu,

Fan

et al. 2024

Int. J. Str. Stab. Dyn.

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Considering the importance of wind turbine tower, its vibration under multi-hazard action consisting of vortex-induced load and seismic load needs to be controlled, especially as the height of the wind turbine tower increases, it increases the risk of its higher-order vibration. To address this issue, theoretical equations for vortex-induced load based on the governing equation of particle damping system are put forward, the vibration control of a 1/20 scale wind turbine model is studied, and the experimental and numerical analyses are conducted. Many studies have shown that wind turbine tower equipped with tuned mass damper (TMD) can result in an RMS response reduction ratio ranging from 20% to 40%. Compared to TMD, particle tuned mass damper (PTMD) has better vibration control effect under single seismic load, and still achieves good vibration control ability with a maximum RMS (root–mean–square) reduction ratio of 35.55% under multi-hazard action. Furthermore, MPTMD (multiple particle tuned mass damper) is proposed for controlling higher-order vibration mode, achieving a maximum RMS reduction ratio of 65.93%. Combining the spectrum diagram result, the ability to control higher-order mode vibration of MPTMD is confirmed.

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Structural Behavior of Long Span Overhead Sign Support Bridges

Tuhin¹

2020

OJCE

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Overhead sign-support bridges that allow displaying necessary information for travelers across the multiple lanes in highways often use large message sign panels: static message sign (SMS) panels or dynamic message sign (DMS) panels. Along with conventional SMS panel, the use of DMS panel is increasing in highways over time owing to their effective capability to guide the travelers in real-time. A 230-ft long span 4-chord overhead steel truss bridge attached with SMS and DMS panel has been studied through extensive finite element analysis to observe the structural integrity. The static wind load was applied in model truss for four different configurations as per 2016 AASHTO LRFD design specification. The innovative structural detailing approach for truss end support and connection detailing for toll-equipment supporting frame was proposed based on static analysis. The present study will help engineers to design overhead sign support bridges by ensuring both public safety and structural integrity.

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Operational Post Deformation of Cantilever Sign Support Structures from Truck-Induced Wind Gusts

Cited by 3 publications

References 6 publications

Experimental Study on Torsion Resistance of Foundation Ring Land-Based Wind Power Expanded Foundation Scale Model

Experimental Study on Torsion Resistance of Foundation Ring Land-Based Wind Power Expanded Foundation Scale Model

Vibration Control Effect Analysis of PTMD in Wind Turbine Tower Under Multi-Hazard Action of Earthquake and Vortex-Induced Wind

Structural Behavior of Long Span Overhead Sign Support Bridges

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