1. Ph.D. Candidate, School of Civil Engineering, College of Engineering, Univ. of Tehran, 16 Azar Ave., P.O. Box 11155-4563, Tehran, Iran; presently, Visiting Scholar, Hole School of Construction Engineering, Dept. of Civil and Environmental Engineering, Univ. of Alberta, 5-085 Markin CNRL Natural Resources Engineering Facility, Edmonton, AB, Canada T6G 2W2.
2. Associate Professor, School of Civil Engineering, College of Engineering, Univ. of Tehran, 16 Azar Ave., P.O. Box 11155-4563, Tehran, Iran (corresponding author).
3. Professor, Hole School of Construction Engineering, Dept. of Civil and Environmental Engineering, Univ. of Alberta, 5-080 Markin CNRL Natural Resources Engineering Facility, Edmonton, AB, Canada T6G 2W2.