1. Ph.D. Candidate, Dept. of Civil, Geological, and Mining Engineering, École Polytechnique, P.O. Box 6079, Station CV, Montréal PQ, Canada H3C 3A7.
2. Professor, Dept. of Civil, Geological, and Mining Engineering, École Polytechnique, P.O. Box 6079, Station CV, Montréal PQ, Canada H3C 3A7 (corresponding author).