1. Professor, Dept. of Civil Engineering, Univ. of Kentucky, C151C Raymond Building, Lexington, KY 40506 (corresponding author).
2. Professor, Dept. of Civil and Environmental Engineering, Univ. of Waterloo, ON, Canada N2L 3G1.
3. Associate Professor, Dept. of Civil, Architectural and Environmental Engineering, Univ. of Texas at Austin, Austin, TX.
4. Doctoral Candidate, Dept. of Civil Engineering, Univ. of Kentucky, Lexington, KY.
5. Graduate Research Assistant, Dept. of Civil Engineering, Univ. of Kentucky, Lexington, KY.