1. Ph.D. Candidate, Dept. of Civil and Environmental Engineering, Maroun Semaan Faculty of Engineering and Architecture, American Univ. of Beirut, P.O. Box 11-0236, Riad El Solh, Beirut 1107 2020, Lebanon.
2. Associate Professor, Dept. of Civil and Environmental Engineering, Maroun Semaan Faculty of Engineering and Architecture, American Univ. of Beirut, P.O. Box 11-0236, Riad El Solh, Beirut 1107 2020, Lebanon (corresponding author).