EL OUNI, MOHAMED HECHMI, DEPARTMENT OF CIVIL ENGINEERING, COLLEGE OF ENGINEERING, KING KHALID UNIVERSITY, ABHA, KINGDOM OF SAUDI ARABIA / B LABORATORY OF SYSTEMS AND APPLIED MECHANICS, TUNISIA POLYTECHNIC SCHOOL, UNIVERSITY OF CARTHAGE, LA MARSA, TUNIS, TUNISIA / HIGHER INSTITUTE OF APPLIED SCIENCES AND TECHNOLOGIES OF SOUSSE, UNIVERSITY OF SOUSSE, SOUSSE, TUNISIA, Saudi Arabia