Earth Quake Analysis as per AASHTO for Discontimuous Bridges

I would like to know aashto reference to get the details of Earth quake analysis for non continuous Bridges. I have 5 prestressed girders resting on RCC transoms and RCC piles. I would like to know the exact procedure to calculate earth quake forces & deflections for 4 spans of 25 m each with expansion joints after each span. Any web site which can help me.

 

[bridgebuster]

The National Highway Institute sells a collection of seven manuals [used to be $100]containing excellent examples for the various EQ analyses.

If your structure can be analyzed by the uniform load method or single mode response it's fairly straight forward; just follow the instructions in the AASHTO Standard Specifications.

 

[Qshake]

Also note that there used to be an example of a multi-span, simple beam bridge in the commentary. You may have to look back several years.

 

[wiktor]

The good source for this type of analyses is Seisab user manual, if you could secure a copy, or better, download the trial version of the program with the manual from

http://www.imbsen.com.

In the manual, there is an example analyse of very similar bridge.
Take a lokk also into the followig publications:

http://www.tfhrc.gov/seismic/bridges.htm

http://www.tfhrc.gov/pubrds/marapr99/seismic.htm