1. Professor, Dept. of Civil and Architectural Engineering, College of Engineering, Sultan Qaboos Univ., P.O. Box 33, Al-Khoud 123, Oman (corresponding author).
2. Researcher, Housing and Building National Research Center, 87 El-Tahrir St., Dokki, P.O. Box 1770, Cairo, Egypt.
3. Associate Researcher, Housing and Building National Research Center, 87 El-Tahrir St., Dokki, P.O. Box 1770, Cairo, Egypt.
4. Director and Professor, Earth Science Research Centre, Sultan Qaboos Univ., Al-Khoud 123, Oman.
5. Associate Professor, Dept. of Civil and Architectural Engineering, College of Engineering, Sultan Qaboos Univ., P.O. Box 33, Al-Khoud 123, Oman.