1. Graduate Research Assistant, Via Dept. of Civil and Environmental Engineering, Virginia Tech, 19 Patton Hall, Blacksburg, VA 24061 (corresponding author).
2. University Distinguished Professor Emeritus, Via Dept. of Civil and Environmental Engineering, Virginia Tech, 120-D Patton Hall, Blacksburg, VA 24061.
3. Associate Professor of Practice, Via Dept. of Civil and Environmental Engineering, Virginia Tech, 110 Patton Hall, Blacksburg, VA 24061.