1. Ph.D. Candidate, Dept. of Civil, Geological and Mining Engineering, Ecole Polytechnique of Montréal, P.O. Box 6079, Station Centre-ville, Montreal, PQ H3C 3A7, Canada; and Structural Engineer, Hydro Division, SNC-Lavalin, Inc., 1801 McGill College Ave., Montreal, PQ H3A 2N4, Canada.
2. Professor, Dept. of Civil, Geological and Mining Engineering, Ecole Polytechnique of Montréal, P.O. Box 6079, Station Centre-ville, Montreal, PQ H3C 3A7, Canada (corresponding author).