Effect of Torsional Stiffness on Distribution of Live Load on Skew Bridges

Prefabrik betonlu çok hücreli kiriş köprüler mükemmel bir burulma sağlamlığı ile estetik bir birliktelik oluşturur. Düz köprülerde burulma etkisi ihmal edilebilir ve enine donatı dizaynı diğer şartlara bağlıdır. Fakat eğimli köprülerde burulma momenti düşünülmelidir. Bu nedenle, bu çalışma 0 ° - 60 ° arasında değişen çapraz açılar ile 90 adet çok hücreli beton kirişli köprü üzerinde sayısal bir biçimde uygulandı. Eğilme ve ikincil momentler arasındaki ilişki araştırıldı ve ikincil momentin eğriliğin artması ile arttığı sonucuna varılmıştır

Eğimli Köprülerde Canlı Yük Dağılımında Burulma Sertliğinin Etkisi

Concrete precast multi-cell box-girder bridges combines aesthetic with torsional stiffness perfectly. In straight bridges the effect of torsion is negligible and the transverse reinforcement design is governed by other requirements. However, in the case of skewed bridges the effect of the torsional moment must be considered. Therefore, this study was performed numerically on 90 numbers concrete multicell box-girder bridges with skew angles ranging from 0° to 60°. The relationship between the bending moments and secondary moments was investigated and it was concluded that secondary action increases with the increase in skewness

PDF

___

AASHTO LRFD, 2007. American Association of State Highway and Transportation Officials: Load and Resistance Factor Design, 4th Edition, Washington, DC.
Bae, H.U., Oliva, M.G., Bank, B.C., 2011. Reinforcement-Free Decks Using Modified Strut-and-Tie Model, ACI Structural Journal 108, 562-571.
CHBDC, 2000. Canadian Highway Bridge Design Code, Canadian Standards Association, Etobicoke, Ontario, Canada.
Chun, B.J., 2010. Skewed Bridge Behaviours: Experimental, Analytical and Numerical Analysis.
Fan, Z., 1999. Field and Computational Studies of Steel Trapezoidal Box Girder Bridges, Ph. D. Thesis, Civil and Environmental Engineering Department, University of Houston, U.S.
Heins, C.P., Lee, W.H., 1981. Curved Box-Girder Bridge: Field Test, Journal of Structural Division 107, 317-327.
Huo, X.S., Zhang, Q., 2008. Effect of Skewness on the Distribution of Live Load Reaction at Piers of Skewed Continuous Bridges, Journal of Bridge Engineering 13, 110- 114.
Jaeger, L.G., Bakht, B., 1982. The Grillage Analogy in Bridge Analysis, Canadian Journal of Civil Engineering, 224-235.
Park, N.H., Choi, Y.J., Kang, Y.J., 2005. Spacing of Intermediate Diaphragms in Horizontally Curved Steel Box Girder Bridges, Finite elements in analysis and design 41, 925-943.
Puckett, J. Huo, X, Patrick, M., Jablin, M., Mertz, D., Peavy, M., 2005. Simplified Live Load Distribution Factor Equations for Bridge Design, Transportation Research Record: Journal of the Transportation Research Board 11, 67-78.