1. Associate Professor, School of Civil and Construction Engineering, Oregon State Univ., Corvallis, OR 97331 (corresponding author).
2. Graduate Student, School of Civil and Construction Engineering, Oregon State Univ., Corvallis, OR 97331.
3. Research Assistant, School of Civil and Environmental Engineering, Washington State Univ., Pullman, WA 99164.
4. Assistant Professor, Dept. of Engineering and Science Education, Clemson Univ., Clemson, SC 29634.