1. Professor, Dept. of Civil Engineering, Concordia Univ., 1455 de Maisonneuve W., Montreal PQ, Canada H3G 1M8. E-mail: ram@civil.concordia.ca
2. Graduate Assistant, Dept. of Civil Engineering, Concordia Univ., 1455 de Maisonneuve W., Montreal PQ, Canada.
3. Research Scientist, Dept. of Civil Engineering, Concordia Univ., 1455 de Maisonneuve W., Montreal PQ, Canada.