1. Postdoctoral Fellow, Dept. of Civil Engineering, Queen’s Univ., 58 University Ave., Kingston ON, Canada K7L 3N6. E-mail: jimmy@civil.queensu.ca
2. Associate Professor, Dept. of Civil Engineering, Royal Military College of Canada, P.O. Box 17000, STN FORCES, Kingston ON, Canada K7K 7B4. E-mail: wight-g@rmc.ca
3. Professor, Dept. of Civil Engineering, Queen’s Univ., 58 University Ave., Kingston ON, Canada K7L 3N6. E-mail: greenm@civil.queensu.ca