1. Assistant Professor, Dept. of Civil and Environmental Engineering, Univ. of Connecticut, Storrs, CT 06269-3037; formerly, Graduate Student, Dept. of Civil and Environmental Engineering, Louisiana State Univ., Baton Rouge, LA 70803.
2. Professor, Dept. of Civil and Environmental Engineering, Louisiana State Univ., Baton Rouge, LA 70803 (corresponding author).
3. Graduate Student, Dept. of Civil and Environmental Engineering, Louisiana State Univ., Baton Rouge, LA 70803.