1. Ph.D. Candidate, Dept. of Civil Engineering, Razi Univ., Baghe Abrisham, 67156-85438 Kermanshah, Iran.
2. Professor, Dept. of Civil Engineering, Razi Univ., Baghe Abrisham, 67156-85438 Kermanshah, Iran (corresponding author).
3. Senior Lecturer, Dept. of Computer Science, Univ. of Malaya, Jalan Universiti, 50603 Kuala Lumpur, Malaysia.
4. Professor, Dept. of Civil Engineering, Faculty of Engineering, Univ. of Malaya, Jalan Universiti, 50603 Kuala Lumpur, Malaysia.