1. Assistant Professor, Specialty Units for Safety and Preservation of Structures, College of Engineering, King Saud Univ., P.O. Box 800, Riyadh 11421, Kingdom of Saudi Arabia (corresponding author).
2. Professor, Dept. of Mechanical and Environmental Informatics, Graduate School of Information Science and Engineering, Tokyo Institute of Technology, 2-12-1, W8-22, O-Okayama, Meguro-Ku, Tokyo 152-8552, Japan.