Seismic design of lifeline bridge using hybrid seismic isolation

Date

2002-03-01

Author

Dicleli, Murat

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This paper presents the merits of a hybrid seismic isolation system used for the seismic design of a major bridge. The bridge is analyzed for two different arrangements of seismic isolation systems. The first arrangement consists of friction pendulum bearings at all substructure locations; the other incorporates a hybrid system where laminated elastomeric bearings are used at the abutments and friction pendulum bearings at the piers. Analysis results have demonstrated that the hybrid seismic isolation system provided a structure with a fundamental period long enough to attract smaller seismic forces, while controlling the magnitude of isolation bearings displacements. It also provided a more uniform distribution of seismic forces among substructure elements. As a result, higher seismic forces on the piers were reduced, allowing for a more economical design of substructures. The hybrid seismic isolation system helped to control the wind-induced vibrations and reduced the sizes of the isolation bearings.

Subject Keywords

Civil and Structural Engineering, Building and Construction

URI

https://hdl.handle.net/11511/35356

Journal

Journal of Bridge Engineering

DOI

https://doi.org/10.1061/(asce)1084-0702(2002)7:2(94)

Collections

Department of Engineering Sciences, Article

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Citation Formats

M. Dicleli, “Seismic design of lifeline bridge using hybrid seismic isolation,” Journal of Bridge Engineering, pp. 94–103, 2002, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/35356.