1. Doctoral Candidate, Dept. of Civil & Environmental Engineering, 1173 Glenn L. Martin Hall, Univ. of Maryland, College Park, MD 20742-3021, US (Corresponding author), e-mail: behzad@umd.edu
2. Professor, Dept. of Civil & Environmental Engineering, 1173 Glenn L. Martin Hall, Univ. of Maryland, College Park, MD 20742-3021, US e-mail: msaggour@umd.edu