1. School of Civil Engineering,Purdue University, West Lafayette, IN 47907Phone: (765) 494-2206; Fax: (765) 496-7996; Email: kskritza@purdue.edu
2. Department of Civil and Environmental Engineering,University of Massachusetts, Amherst, MA 01003-9293,Phone: (413) 545-5404; Email: collura@ecs.umass.edu
3. Department of Civil and Environmental Engineering,Virginia Tech, Northern Virginia Center, Falls Church, VA 22043Phone: (703) 538-8456; Email: stignor@aol.com
4. Department of Civil and Environmental Engineering,Virginia Tech, Northern Virginia Center, Falls Church, VA 22043,Phone: (703) 538-8436; Email: dteodorovic@vt.edu