1. Assistant Professor, Dept. of Civil and Environmental Engineering, Lehigh Univ., 326 STEPS Building, Bethlehem, PA 18015; formerly, Assistant Professor, Dept. of Civil and Environmental Engineering, Lafayette College, 321 Acopian Engineering Center, Easton, PA 18042 (corresponding author).
2. Formerly, Research Assistant, Dept. of Civil, Construction and Environmental Engineering, Iowa State Univ., 176 Town Engineering, Ames, IA 50011-3232.
3. Wilson Engineering Associate Professor, Dept. of Civil, Construction and Environmental Engineering, Iowa State Univ., 406 Town Engineering, Ames, IA 50011-3232.