1. Professor, Dept. of Civil and Environmental Engineering, Univ. of California, Irvine, CA 92697 (corresponding author).
2. Graduate Student, Dept. of Civil and Environmental Engineering, Univ. of California, Irvine, CA 92697.
3. Postdoctoral Researcher, Dept. of Civil and Environmental Engineering, Univ. of California, Irvine, CA 92697.