Structural Engineering and Mechanics

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Transverse earthquake-induced forces in continuous bridges

  • Armouti, Nazzal S. (Department of Civil Engineering, University of Jordan)
  • Received : 2001.08.01
  • Accepted : 2002.10.21
  • Published : 2002.12.25
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Abstract

A simplified rational method is developed to evaluate transverse earthquake-induced forces in continuous bridges. This method models the bridge as a beam on elastic foundation, and assumes a sinusoidal curve for both vibration mode shape and deflected shape in the transverse direction. The principle of minimum total potential is used to calculate the displacements and the earthquake-induced forces in the transverse direction. This method is concise and easy to apply, and hence, offers an attractive alternative to a lengthy and time consuming three dimensional modeling of the bridge as given by AASHTO under its Single Mode Spectral Analysis Method.

Keywords

References

  1. American Association of State Highway and Transportation Officials (AASHTO) (1992), Standard Specifications for Highway Bridges; Division I-A, 15th edn, American Association of State Highway and Transportation Officials, Washington, DC.
  2. Buckle, I.G., Mayes, R.L. and Button, M.R. (1987), "Seismic design and retrofit manual for highway bridges", Report No. FHWA-IP-6, Final Report, National Technical Information Service, Springfield, Verginia. 130-136.
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  4. Clough, R.W. and Penzien, J. (1993), Dynamics of Structures, McGraw Hill, New York.
  5. FEMA. Federal Emergency Management Agency (1994), "NEHRP recommended provisions for the development of seismic regulations for new buildings", Part 1 Provisions, Washington, DC.

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