1. Professor, Dept. of Civil Engineering, Bangladesh Univ. of Engineering and Technology (BUET), Dhaka-1000, Bangladesh (corresponding author).
2. Assistant Professor, Dept. of Civil Engineering, Bangladesh Univ. of Engineering and Technology (BUET), Dhaka-1000, Bangladesh.
3. Principal Engineer/Consultant, Optimum System Designers, 2387 E Skipping Rock Way, Tucson, AZ85737.