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Aerodynamic Tailoring of a Bluff Deck Section Subjected to Inclined Winds Due to the Complex Orography of the Construction Site

  • T. ArgentiniEmail author
  • S. Omarini
  • A. Zasso
  • M. Petrangeli
Conference paper
Part of the Lecture Notes in Civil Engineering book series (LNCE, volume 27)

Abstract

Bridges crossing steep valleys in mountainous regions may be subjected to large angles of attack of the incoming wind flow, because of the complex orography of the region where the structure is located. Therefore, the aerodynamic analysis of bridges in this kind of regions should account for this peculiarity. In this paper, the aerodynamic characterization of a bluff deck section of a railway bridge, with angles of attack ranging from −6 to +6° is discussed. It is shown that standard analyses that consider only angles of attack near 0° only are not sufficient to ensure optimal aerodynamic performances. Indeed, with such large angles of attack the flow field near the deck may change consistently, also leading to aeroelastic instabilities or strong vortex-induced vibrations. To mitigate the aeroelastic issues, without an abrupt change of the deck section, several aerodynamic appendices were tested, and a tailored section with acceptable behavior was selected.

Keywords

Bridge Steep valley Bluff deck section Instability Large angle of attack Aerodynamic tailoring 

References

  1. Zasso A, Rocchi D, Argentini T, Giappino S, Costantini T (2016) Experimental and numerical aerodynamic analysis of a concrete railway bridge in tandem arrangement with a truss road bridge. In: 8th international colloquium on bluff body aerodynamics and applicationsGoogle Scholar
  2. Amerio L, Argentini T, Rocchi D, Zasso A (2017) Experimental and numerical aerodynamic optimization of a post-tensioned concrete railway bridge in tandem arrangement with a truss road bridge. In: 7th European African conference on wind engineeringGoogle Scholar
  3. RWDI (2006) Topographical model study Anji Khad arch bridge Jammu e Kashmir India, Final reportGoogle Scholar
  4. Argentini T, Pagani A, Rocchi D, Zasso A (2014) Monte Carlo analysis of total damping and flutter speed of a long span bridge: effects of structural and aerodynamic uncertainties. J Wind Eng Ind Aerodyn 128:90–104CrossRefGoogle Scholar

Copyright information

© Springer Nature Switzerland AG 2019

Authors and Affiliations

  • T. Argentini
    • 1
    Email author
  • S. Omarini
    • 1
  • A. Zasso
    • 1
  • M. Petrangeli
    • 2
  1. 1.Department of Mechanical EngineeringPolitecnico di MilanoMilanItaly
  2. 2.Mario Petrangeli & Associati srl.RomeItaly

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