1. Professor, Dept. of Civil Engineering, Univ. of Calgary, 2500 University Dr. NW, Calgary, AB, Canada T2N 1N4.
2. Emeritus Professor, Dept. of Civil Engineering, Univ. of Calgary, 2500 University Dr. NW, Calgary, AB, Canada T2N 1N4.
3. Senior Structural Engineer, Krupp Canada Inc., 986 Tuscany Dr., NW, Calgary, AB, Canada T3L 2T4 (corresponding author).