1. Research Assistant, Dept. of Civil Engineering, Univ. of Memphis, Memphis, TN 38152.
2. Assistant Professor, Dept. of Civil Engineering, Univ. of Memphis, Memphis, TN 38152 (corresponding author).
3. Assistant Professor, Dept. of Civil and Environmental Engineering, Old Dominion Univ., Norfolk, VA 23529.
4. Associate Professor, Dept. of Civil Engineering, Univ. of Memphis, Memphis, TN 38152.