1. Graduate Research Assistant, Dept. of Civil, Architectural and Environmental Engineering and Center for Infrastructure Engineering Studies, Missouri Univ. of Science and Technology, Rolla, MO 65409.
2. Associate Professor of Civil, Architectural and Environmental Engineering, Dept. of Civil, Architectural and Environmental Engineering and Center for Infrastructure Engineering Studies, Missouri Univ. of Science and Technology, Rolla, MO 65409 (corresponding author).