A new large-scale dynamic rig to evaluate rain-wind induced vibrations on stay cables: Design and commissioning

D'Auteuil, Annick; McTavish, Sean; Raeesi, Arash

doi:10.1016/j.jweia.2020.104334

Cited by 4 publications

(4 citation statements)

References 15 publications

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“…Compared with the aforementioned studies, this study used a significantly longer cable, which better reflected the flexible nature of real cables, although required a substantially larger wind tunnel. Most recently, D'Auteuil, McTavish and Raeesi [95] reported the design of a new large-scale RWIV dynamic testing rig that can hold a cable with a maximum diameter of 320 mm and a length-to-diameter ratio of over 15, which can achieve an almost full-scale Reynolds number for many cable prototypes.…”

Section: Wind Tunnel Studies Of Rain-wind-induced Vibrationmentioning

confidence: 99%

Wind-Induced Phenomena in Long-Span Cable-Supported Bridges: A Comparative Review of Wind Tunnel Tests and Computational Fluid Dynamics Modelling

2021

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Engineers, architects, planners and designers must carefully consider the effects of wind in their work. Due to their slender and flexible nature, long-span bridges can often experience vibrations due to the wind, and so the careful analysis of wind effects is paramount. Traditionally, wind tunnel tests have been the preferred method of conducting bridge wind analysis. In recent times, owing to improved computational power, computational fluid dynamics simulations are coming to the fore as viable means of analysing wind effects on bridges. The focus of this paper is on long-span cable-supported bridges. Wind issues in long-span cable-supported bridges can include flutter, vortex-induced vibrations and rain–wind-induced vibrations. This paper presents a state-of-the-art review of research on the use of wind tunnel tests and computational fluid dynamics modelling of these wind issues on long-span bridges.

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Section: Wind Tunnel Studies Of Rain-wind-induced Vibrationmentioning

confidence: 99%

Wind-Induced Phenomena in Long-Span Cable-Supported Bridges: A Comparative Review of Wind Tunnel Tests and Computational Fluid Dynamics Modelling

2021

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“…The main physical parameters of the coal rock are presented in Table 1. The following assumptions were made before modeling the workface rock: (1) The PJM tunnels horizontally, that is, the workface model is perpendicular to the PJM model, without considering the impact of coal seam inclination; (2) The workface model encompasses spherical particles of equal size with a diameter of 30mm; as the workface breaks, the forces between coal particles are of the same magnitude; (3) The workface is 150mm tall, 800mm wide, and 3,000mm long.…”

Section: Model Parametersmentioning

confidence: 99%

“…Conventional tunneling methods, which rely on shield tunneling machine [1], large-diameter drilling machine [2,3], or shaft [4][5][6], face common problems like slow rock-breaking speed, large equipment size, and high operating cost, failing to set up rescue channels rapidly. Pipe jacking machine (PJM), an engineering equipment to lay small-diameter pipes in complex stratum, boasts the ability to tunnel quickly into coal rock stratum [7,8].…”

Section: Introductionmentioning

confidence: 99%

Discrete- and Finite-Element Analysis on the Tunneling Safety of Pipe Jacking Machine in Coal Rock Formation

Gao¹,

Lv²,

Chang-yuan³

et al. 2020

IJHT

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During pipe jacking in unstable coal rock formation, it is difficult to ensure the stability of the workface and the structural safety of the equipment. To solve the problem, this paper establishes a numerical model for the rock-breaking and slag discharge of pipe jacking machine (PJM) with different tunneling parameters, and numerically analyzes the variations in the flow rate and speed of slags, and the stress and deformation of cutterhead, at different cutterhead speeds (1.0-4.0r/min) and jacking speeds (0.5-4.0mm/s). Based on the simulation results, the authors discussed how different tunneling parameters affect the tunneling safety. The simulation results highlight the importance of the matching between cutterhead speed and jacking speed to tunneling safety. As the jacking speed increased, the load of the cutterhead increased significantly, which may cause the cutter to wear. At the jacking speed of 4.0mm/s, the equivalent stress and deformation of cutterhead peaked at 397.43MPa, and 10.73mm, respectively. Excessive jacking speed may result in accidents, such as deformation and structural fracture of cutterhead, posing a serious threat to the structural safety of cutterhead. As the cutterhead speed increased from 1.0r/min to 4.0r/min, the mean axial speed of slags dropped by 68%, and the slag flow rate declined by 76%, due to the rapid discharge of slags from the cabin. In this case, the slag volume in the cabin cannot provide sufficient support to the workface rock, and the risk of collapse soars during the tunneling in unstable formation. In addition, an excessive cutterhead speed increased tunneling energy consumption and aggravated the wear of the cutterhead. The research results promote the setting of control parameters for the safe pipe jacking in unstable coal rock formation.

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“…Two finite element (FE) modeling schemes are adopted, namely one-element cables and multi-element cables, with each stay-cable discretized into multiple elements to consider the cable vibration effect. Considering that the long-span cable will vibrate under different weather conditions, D'Auteuil et al [11] developed a new type of wind-and rain-induced vibration test.…”

Section: Introductionmentioning

confidence: 99%

Intelligent Safety Assessment of Prestressed Steel Structures Based on Digital Twins

et al. 2021

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In the development process of intelligent construction, the safety assessment of prestressed steel structures as an important research direction has become more and more attractive in academia. Digital twins (DTs) is the key technology to realize intelligent construction. The virtual and real interaction of the DTs can provide an efficient management and control mechanism for the construction process. This research proposes an intelligent safety assessment method of prestressed steel structures based on DTs. In this research method, the structural safety assessment is divided into two aspects: performance analysis and maintenance. By analyzing the characteristics of the construction safety assessment, a DTs framework for construction safety assessment is built. Driven by the DTs framework, a physical space model and a virtual space model are constructed. On the basis of virtual and actual interaction, multidimensional information fusion of time and space is carried out to realize the analysis of structural safety performance. On this basis, the paper establishes a Bow-tie model for the maintenance modeling of unsafe construction events. Moreover, the theoretical method formed is applied to the construction of a symmetrical structure (wheel–spoke cable truss). The validity of the method is verified by comparing the cable force calculated by the theoretical method and measured on site. The assessment method driven by the DTs ensures the structural safety and improves the intelligence level of safety management and control of the structure construction.

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A new large-scale dynamic rig to evaluate rain-wind induced vibrations on stay cables: Design and commissioning

Cited by 4 publications

References 15 publications

Wind-Induced Phenomena in Long-Span Cable-Supported Bridges: A Comparative Review of Wind Tunnel Tests and Computational Fluid Dynamics Modelling

Wind-Induced Phenomena in Long-Span Cable-Supported Bridges: A Comparative Review of Wind Tunnel Tests and Computational Fluid Dynamics Modelling

Discrete- and Finite-Element Analysis on the Tunneling Safety of Pipe Jacking Machine in Coal Rock Formation

Intelligent Safety Assessment of Prestressed Steel Structures Based on Digital Twins

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