1. Associate Professor, Dept. of Civil and Environmental Engineering, Temple Univ., 1947 N. 12th St., Philadelphia, PA 19122.
2. Assistant Professor, Dept. of Civil and Environmental Engineering, Temple Univ., 1947 N. 12th St., Philadelphia, PA 19122 (corresponding author).
3. Graduate Student, Dept. of Civil and Environmental Engineering, Temple Univ., 1947 N. 12th St., Philadelphia, PA 19122.