Study On Wind Resistance Performance Of PC Composite Box Girders With Corrugated Steel Webs

Corrugated steel web prestressed concrete girder bridge is a corrugated steel webs toreplace the ordinary prestressed concrete box girder bridge concrete web of the new bridgestructure, its advantage is to give full play to the steel web shear and top, the backplaneconcrete tensile strength, compressive properties, and thus to a certain extent in recent years,large-span bridge engineering applications. The geometric shape of the corrugated steel webshave a strong sensitivity of the atmospheric boundary layer wind environment, it is necessaryto wind resistance accordingly.Based on FLUENT and ANSYS finite element softwareprestressed concrete composite box girders with corrugated steel webs system moresystematic analysis, the main contents in this paper are as follows:(1) Describes the basic characteristics of the atmospheric boundary layer windenvironment and the role of the bridge structure, and discuss the current bridge wind-inducedvibration analysis.(2) Discusses the bridge wind-induced vibration mechanism and the basis of numericalanalysis,using computational fluid dynamics (CFD) method to build wind-induced vibrationanalysis model and implementation.(3) A large-span bridge (83+153+83=319m) is chosen as the research in this paper,Under the bridge the wind induced buffeting analysis of CFD theory and methods,thecorrugated steel web prestressed concrete girder cross-section through the FLUENT softwarefor two-dimensional flow field and cross-dimensional segment model,numericalsimulation,calculation of the static aerodynamic coefficients,and variation analysis.(4) Based on bridge flutter mechanism and forced vibration identificationmethod,moving mesh model, and identified five non-dimensional wind speed of flutterderivatives obtained with corrugated steel webs of box girder bridge critical flutter velocity.Finally, the relervant conclusions are given and the problems to be researched arepresented in the paper.