1. Graduate Research Assistant, Civil, Environmental and Construction Engineering, Univ. of Central Florida, 4000 Central Florida Blvd., P.O. Box 162450, Orlando, FL 32816-2450.
2. Associate Professor, Civil, Environmental and Construction Engineering, Univ. of Central Florida, 4000 Central Florida Blvd., P.O. Box 162450, Orlando, FL 32816-2450 (corresponding author).