1. Graduate Research Assistant, Center for Infrastructure Engineering Studies, Dept. of Civil, Architectural, and Environmental Engineering, Univ. of Missouri-Rolla, Rolla, MO 65409. E-mail: mex84@umr.edu
2. Graduate Research Assistant, Center for Infrastructure Engineering Studies, Dept. of Civil, Architectural, and Environmental Engineering, Univ. of Missouri-Rolla, Rolla, MO 65409. E-mail: arx8d@umr.edu
3. Associate Professor, Center for Infrastructure Engineering Studies, Dept. of Civil, Architectural, and Environmental Engineering, Univ. of Missouri-Rolla, Rolla, MO 65409. E-mail: jmyers@umr.edu
4. Vernon and Marelee Jones Professor, Director-Center for Infrastructure Engineering Studies, Dept. of Civil, Architectural, and Environmental Engineering, Univ. of Missouri-Rolla, Rolla, MO 65409. E-mail: nanni@umr.edu