1. Research Assistant, Dept. of Civil Engineering, Univ. of New Brunswick, Fredericton, NB, E3B 5A3, Canada (corresponding author).
2. Assistant Professor, Dept. of Civil Engineering, Univ. of New Brunswick, Fredericton, NB, E3B 5A3, Canada.
3. Professor Emeritus, Dept. of Civil Engineering, Univ. of New Brunswick, Fredericton, NB, E3B 5A3, Canada.