Author ORCID Identifier
http://orcid.org/0000-0002-0919-6156 : David S-K Ting
Wind Engineering for Natural Hazards: Modeling, Simulation, and Mitigation of Windstorm Impact on Critical Infrastructure
Cable-stayed bridges have become progressively popular since 1955, mainly because of their modest requirement on ground anchorage condition, efficient use of structural material, higher stiffness, and economy compared to suspension bridges. The inclined and/or yawed orientation of bridge stay cables results in the formation of secondary axial flow on the leeward side of cable surface, which is believed to be one of the contributing factors exciting some unique wind-induced cable vibration phenomena. To clarify the role of axial flow in triggering aerodynamic instability of stay cables, a numerical study has been conducted to indirectly examine the axial flow effect via a perforated splitter plate placed along the central line of a circular cylinder wake. Results show that the presence of a perforated wake splitter plate would play a similar role as the axial flow in affecting the strength of von Kármán vortex shedding. Reductions on the fluctuating amplitude of the instantaneous lift and drag, as well as the mean drag, are also observed, which would ultimately affect the aerodynamic response of the studied cylinder.
Wang, Ran; Cheng, Shaohong; and Ting, David S-K. (2018). Simulating the Role of Axial Flow in Stay Cable Vibrations via a Perforated Wake Splitter Plate”, ASCE Special Edition: Wind Engineering in Natural Hazards. Wind Engineering for Natural Hazards: Modeling, Simulation, and Mitigation of Windstorm Impact on Critical Infrastructure, 111-132.