1. Postdoctoral Fellow, Dept. of Civil Engineering, Univ. of Sherbrooke, 2500 Blvd. de l’Université, Sherbrooke, Qubec J1K2R1.
2. Professor of Civil Engineering, Missouri Univ. of Science and Technology, Miner Circle, Rolla, MO 65409; and the Univ. of Sherbrooke, 2500 Blvd. de l’Université, Sherbrooke, Québec J1K2R1 (corresponding author).
3. Civil Engineer, Hydro-Québec Utilities, Montreal, Québec H2X3P4.