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