1. Assistant Professor of Civil Engineering, Univ. of Missouri-Kansas City, Kansas City, MO 64110 (corresponding author).
2. Professor of Civil Engineering, Dept. of Civil, Construction, and Environmental Engineering, Iowa State Univ., Ames, IA 50011.
3. Associate Professor of Civil Engineering, Dept. of Civil, Construction, and Environmental Engineering, Iowa State Univ., Ames, IA 50011.