1. Research Associate, Dept. of Civil, Geological, and Mining Engineering, Polytechnique Montreal, P.O. Box 6079, Station Centre-ville, Montreal, QC, Canada H3C 3A7.
2. Professor, Dept. of Civil, Geological, and Mining Engineering, Polytechnique Montreal, P.O. Box 6079, Station Centre-ville, Montreal, QC, Canada H3C 3A7 (corresponding author).
3. Professor, Dept. of Civil, Geological, and Mining Engineering, Polytechnique Montreal, P.O. Box 6079, Station Centre-ville, Montreal, QC, Canada H3C 3A7.