1. Postdoctoral Fellow, Dept. of Civil and Environmental Engineering, One Shields Ave., Univ. of California at Davis, Davis, CA 95616.
2. Master Student, Dept. of Civil and Environmental Engineering, One Shields Ave., Univ. of California at Davis, Davis, CA 95616.
3. Ph.D. Student, Dept. of Civil and Environmental Engineering, One Shields Ave., Univ. of California at Davis, Davis, CA 95616.
4. Professor, Dept. of Civil and Environmental Engineering, One Shields Ave., Univ. of California at Davis, Davis, CA 95616 (corresponding author).