1. Ph.D. Student, Univ. of Waterloo, 200 University Ave. W, Waterloo, ON, Canada N2L 3G1; presently, Lecturer, on leave, Dept. of Civil Engineering, Prince Sattam Bin Abdulaziz Univ., Al-Kharj, Saudi Arabia (corresponding author).
2. Distinguished Professor Emeritus, Univ. of Waterloo, 200 University Ave. W, Waterloo, ON, Canada N2L 3G1.
3. Assistant Professor, Dept. of Civil and Environmental Engineering/Dept. of Mechanical and Mechatronics Engineering, Univ. of Waterloo, ON, Canada N2L 3G1.