Aeroelastic analysis of non-conventional and slender suspension bridges

• Autorzy: Tcheutchoua Soh Mike Cedric , Donko Maël Sonna , Maiorana Emanuele

Identyfikatory

DOI

10.7409/rabdim.024.016

Warianty tytułu

PL

Analiza aeroelastyczna niekonwencjonalnych i smukłych mostów wiszących

• Języki publikacji: EN PL

Abstrakty

EN

The aim of this study was to investigate the dynamic effects of wind actions on bridge cross sections, with a goal to propose design charts for non-conventional and slender bridge decks. An eigenvalue analysis was conducted first and the results were validated experimentally. Subsequently, aeroelastic analysis of the bridge deck section was performed. This analysis encompassed the analytical method adhering to the Eurocode and computational fluid dynamics simulations. Both methodologies indicated that the bridge was susceptible to vortex-induced vibrations. To mitigate these vibrations, wind noses provide better stability than the currently used guide vanes. The effect of changing deck width was also studied. Wider and more streamlined sections displayed better aeroelastic performance. The study also revealed that the Eurocode overestimates the derivatives of aerodynamic moment coefficient by 53% to 93%. Consequently, optimized charts are proposed to enhance the accuracy of torsional divergence and flutter speed calculations, facilitating the safe and efficient design of such bridges.

PL

Celem przedstawionej pracy było zbadanie oddziaływań dynamicznych wiatru na przekrój poprzeczny mostu i zaproponowanie wykresów wspomagających projektowanie pomostów smukłych i niekonwencjonalnych. W pierwszej kolejności dokonano analizy wartości własnych i zweryfikowano jej wyniki doświadczalnie. Następnie wykonano analizę aeroelastyczną przekroju pomostu. W ramach analizy uwzględniono zarówno metodę analityczną według Eurokodu, jak i symulacje z zastosowaniem obliczeniowej mechaniki płynów. Obie metody wykazały, że most jest podatny na drgania wywołane wzbudzaniem wirowym. Jako środki przeciwdziałające tym drganiom odchylacze strumienia wiatru wykazują większą skuteczność niż obecnie stosowane na obiekcie blachy kierujące. Zbadano również wpływ szerokości pomostu. Szersze i bardziej opływowe przekroje wykazywały większą stateczność aerodynamiczną. Badania pokazały również, że Eurokod zawyża szacowaną pochodną współczynnika momentu aerodynamicznego o 53% do 93%. W rezultacie zaproponowano zoptymalizowane wykresy, aby poprawić dokładność obliczeń prędkości flatteru (łopotania) oraz wspomóc projektowanie bezpiecznych i wydajnych mostów tego typu.

Słowa kluczowe

EN

aeroelasticity; computational fluid dynamics; suspension bridge; wind-induced vibrations; wind tunnel testing

PL

aeroelastyczność; badania w tunelu aerodynamicznym; drgania wzbudzane wiatrem; most wiszący; obliczeniowa mechanika płynów

• Wydawca: Instytut Badawczy Dróg i Mostów
• Czasopismo: Roads and Bridges - Drogi i Mosty
• Rocznik: 2024
• Tom: Vol. 23, no. 4
• Strony: 335--354
• Opis fizyczny: Bibliogr. 26 poz., rys., tab.

Twórcy

autor

Tcheutchoua Soh Mike Cedric

• National Advanced School of Public Works, 3.439 Elig-Effa St., Yaoundé, Cameroon and University of Padova, Via Marzolo 9, 35121 Padova, Italy

• https://orcid.org/0009-0007-6254-9591

autor

Donko Maël Sonna

• Institut National des Sciences Appliquées de Rennes, 20 Avenue des Buttes des Coësmes, 35708 Rennes, France

• https://orcid.org/0000-0002-7169-6194

autor

Maiorana Emanuele

• University of the Republic of San Department of Economics, Science, Engineering and Design, Via Consiglio dei Sessanta 99, 47891 Dogana, San Marino

• https://orcid.org/0000-0002-3574-1410

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