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Aerodynamic and aeroelastic characteristics of typical bridge decks equipped with wind barriers at the windward bridge-deck edge
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SYSNO ASEP 0473548 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Aerodynamic and aeroelastic characteristics of typical bridge decks equipped with wind barriers at the windward bridge-deck edge Author(s) Buljac, Andrija (UTAM-F)
Kozmar, H. (HR)
Pospíšil, Stanislav (UTAM-F) RID, SAI, ORCID
Macháček, Michael (UTAM-F) ORCID, SAI, RIDNumber of authors 4 Source Title Engineering Structures. - : Elsevier - ISSN 0141-0296
Roč. 137, April (2017), s. 310-322Number of pages 13 s. Publication form Print - P Language eng - English Country GB - United Kingdom Keywords bridge decks ; roadway wind barrier ; aerodynamic forces and moments ; galloping ; flutter ; wind-tunnel experiments Subject RIV JM - Building Engineering OECD category Construction engineering, Municipal and structural engineering R&D Projects GA15-01035S GA ČR - Czech Science Foundation (CSF) LO1219 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) UT WOS 000395606100021 EID SCOPUS 85012026135 DOI 10.1016/j.engstruct.2017.01.055 Annotation The present wind-tunnel study focuses on the effects of roadway wind barriers on aerodynamic and aeroelastic characteristics of bridge decks characterized by various aerodynamic shapes of the cross section. Three bridge-deck sections are studied, i.e., streamlined, semi-bluff, and bluff sections. The standard 5 m high (full-scale) wind barrier with 30% porosity is placed at the windward (leading) edge of the bridge-deck sections. Aerodynamic forces and overturning moment are determined at various wind incidence angles. Galloping stability is studied using the quasi-steady theory. Flutter derivatives are determined to evaluate flutter sensitivity of the studied bridge-deck sections with the wind barrier in comparison with the empty bridge-deck sections. The experimental results indicate some important features. In particular, the drag force coefficient is increased for all bridge-deck sections when the wind barrier is in place. This feature is particularly exhibited for the streamlined bridge-deck section. The wind barrier alters the trends and values of the lift force coefficient, while the influence of the wind barrier on the pitch moment is particularly exhibited for positive wind incidence angles, which is characteristic for all bridge-deck sections. The wind barrier does not influence the galloping sensitivity of the studied bridge-deck sections, while it deteriorates their dynamic stability with respect to torsional flutter. Workplace Institute of Theoretical and Applied Mechanics Contact Kulawiecová Kateřina, kulawiecova@itam.cas.cz, Tel.: 225 443 285 Year of Publishing 2018 Electronic address http://www.sciencedirect.com/science/article/pii/S014102961730278X
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