1. Post-Doctoral Research Associate, Civil and Environmental Engineering, Utah State Univ., Logan, UT 84322 (corresponding author).
2. Professor, College of Engineering, Utah State Univ., Logan, UT 84322-4100.
3. Professor, Dept. of Civil Engineering and Architecture, College of Engineering, P.O. Box 32038, Isa Town, Univ. of Bahrain, the Kingdom of Bahrain.