1. Associate Professor, Dept. of Civil and Environmental Engineering, Lehigh Univ., 13 E. Packer Ave., Bethlehem, PA 18015 (corresponding author).
2. Structural Engineer, Faculty of Engineering and Physical Sciences, Univ. of Surrey, Guildford GU2 7XH, U.K.
3. Ph.D. Candidate, Dept. of Civil and Environmental Engineering, Lehigh Univ., 13 E. Packer Ave., Bethlehem, PA 18015.
4. Professor, Dept. of Civil Engineering, Auburn Univ., 238 Harbert Engineering Center, Auburn, AL 36849-5337.
5. Research Civil Engineer, Jacobs Technology, 104 Research Rd. Building 9742, Panama City, FL 32403.