1. AASHTO. AASHTO LRFD bridge design specifications. 4th ed. Washington (DC): American Association of State Highway and Transportation Officials; 2007.
2. AASHTO. Guide specifications for LRFD seismic bridge design. 1st ed. Washington (DC): American Association of State Highway and Transportation Officials; 2009.
3. FHWA. Seismic retrofitting manual for highway structures: part 1-bridges. Publication No. FHWA-HRT-06-032. Washington (DC): Federal Highway Administration; 2006.
4. USGS. United States National Seismic Hazard Maps, US. Geological Survey Earthquake Hazards Program. http://earthquake.usgs.gov/ (Jan. 16, 2009).
5. Seismic response and design;Elnashai,2008