Cover
Vol. 21 No. 1 (2021)

Published: January 31, 2021

Pages: 56-60

Original Article

Parametric Study of the Intermediate External Bracing System of Composite Steel Box Girder Bridges

Hawraa Sami Malik 1 David A. M. Jawad 2
1 Department of Civil Engineering, College of Engineering, University of Basrah, Al-Qadisiya, Iraq
2 Department of Civil Engineering, College of Engineering, University of Basrah, Basrah, Iraq
History
  • Received: August 25, 2020
  • Revised: October 17, 2020
  • Accepted: October 26, 2020
  • Available Online: January 17, 2021
DOI

https://doi.org/10.33971/bjes.21.1.8

Abstract

During the pouring of concrete deck, the installation of external bracing between the inner and outer girders may be necessary when the bridge has sharp curve in order to control the deflection and rotation of the girders. However, it is important to minimize the number of external bracing members, as they have expensive cost and they also have opposite effects for the fatigue features of the steel tub girders. The analysis of curved box girder bridges is carried out numerically by the use of finite element method through (ANSYS 19.2) software. The curved box girder with the intermediate external diaphragms was modeled and the analysis was carried out for many parameters like external bracing sections, girders with or without concrete deck, girders with end diaphragms or without them. The study concluded that ANSYS program has a good ability in evaluating the external bracing force comparing with code equations.

Keywords

References

  1. T. Helwig and J. Yura, “Steel Bridge Design Handbook: Bracing System Design”, Publication No. FHWA-HIF-16002, Vol. 13, 2015.
  2. Cheplak, A. Benjamin, “Field measures of intermediate external diaphragms on a trapezoidal steel box girder bridge”, M.Sc. thesis, University of Texas, Austin, 2001.
  3. Memberg, A. Matthew, “A design procedure for intermediate external diaphragms on curved steel trapezoidal box girder bridges”, M.Sc. thesis, University of Texas, Austin, 2002.
  4. American association for state highway and transportation officials, AASHTO. AASHTO LRFD bridge design specifications, Washington D.C, 2005.
  5. J. M. J. Chong, “Construction Engineering of Steel TubGirder Bridge Systems for Skew Effects”, Ph.D. theses, Georgia Institute of Technology, 2012.
  6. M. A. Memberg, J. A. Yura, E. B. Williamson, and K. H. Frank, “A Design Procedure for Intermediate External Diaphragms on Curved Steel Trapezoidal Box Girder Bridges”, Report No. FHWA/TX-03/1898-1, 2002.