1. Graduate Research Assistant, Dept. of Civil and Environmental Engineering, Pennsylvania State Univ., 3127 Research Dr., State College, PA 16802 (corresponding author).
2. Assistant Professor of Civil and Environmental Engineering, Pennsylvania State Univ., 231M Sackett Building, University Park, PA 16802.
3. Assistant Professor of Civil and Environmental Engineering, Pennsylvania State Univ., 231D Sackett Building, University Park, PA 16802.