1. Postdoctoral Fellow, Dept. of Civil Engineering and Applied Mechanics, McGill Univ., 817 Sherbrooke W., Montreal PQ, Canada H3A 2K6.
2. Associate Professor, Dept. of Building, Civil, and Environmental Engineering, Concordia Univ., 1455 de Maisonneuve Blvd. W., Montreal PQ, Canada H3G 1M8.
3. Professor, Dept. of Building, Civil, and Environmental Engineering, Concordia Univ., 1455 de Maisonneuve Blvd. W., Montreal PQ, Canada H3G 1M8.