1. Associate Professor, Dept. of Civil and Environmental Engineering, Univ. of Connecticut, 261 Glenbrook Rd., Unit-3037, Storrs, CT 06269-3037 (corresponding author).
2. Engineer I, General Dynamics Electric Boat, 75 Eastern Point Rd., Groton, CT 06340; formerly, Graduate Research Assistant, Dept. of Civil and Environmental Engineering, Univ. of Connecticut, Storrs, CT 06269-3037.