1. Graduate Student, Dept. of Structural Engineering, Mansoura Univ., Mansoura City 35516, Egypt; Project Engineer, EMC Co., Egypt.
2. Associate Professor, Civil Engineering, Alabama A&M Univ., Normal, AL 35752; Professor of Civil Engineering, Mansoura Univ., Mansoura 35516, Egypt (corresponding author).
3. Assistant Professor, Dept. of Structural Engineering, Mansoura Univ., Mansoura City 35516, Egypt.