1. Professor of Structural Engineering, Univ. of Quebec, École de Technologie Supérieure, 1100 Notre-Dame St. West, Montreal, Quebec, Canada H3C 1K3 (corresponding author).
2. Ph.D. Candidate, Dept. of Construction Engineering, Univ. of Quebec, École de Technologie Supérieure, Montreal, Quebec, Canada H3C 1K3.
3. Professor of Structural Engineering, Dept. of Civil Engineering, Sherbrooke Univ., Quebec, Canada.