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Seismic requirements for Bridge superstructure

Seismic requirements for Bridge superstructure

Seismic requirements for Bridge superstructure

(OP)

 What are the seismic requirements for Concrete and steel superstructures ? Any references ?

RE: Seismic requirements for Bridge superstructure

please refer to latest codal requirement of your area.
seimic force will assessed on the basis of the mass of the structue.

RE: Seismic requirements for Bridge superstructure

Kokonis36,

Two comments on your question:
1) Fundamentally, bridge design follows the weak column/strong beam concept (basically opposite of buildings.)  Because of this, the superstructure (bridge deck) is a capacity protected element and must be able to behave elastically under plastic hinging of the column.  The AASHTO I-A seismic code describes the design specifics for both steel and concrete superstructures.

2) Depending on your specific location, several codes in high seismic areas have included a vertical component to the seismic design forces (typically 2/3 the horizontal spectra, but this is very general.)  Again, the superstructure needs to remain elastic under this event.

Your question was fairly broad, but I hope this helps, or starts further discussion.

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