1. Assistant Professor, Dept. of Civil and Environmental Engineering, Univ. of Michigan, 2350 Hayward St., Room 2322 G.G. Brown Building, Ann Arbor, MI 48109; formerly, Assistant Professor, Dept. of Civil and Environmental Engineering, Univ. of Wisconsin, 2318 Engineering Hall, 1415 Engineering Dr., Madison, WI (corresponding author).
2. Associate Professor, Dept. of Civil and Environmental Engineering, Univ. of Michigan, 2350 Hayward St., Room 2340 G.G. Brown Building, Ann Arbor, MI 48109.
3. Assistant Professor, Dept. of Civil and Environmental Engineering, Univ. of Michigan, 2350 Hayward St., Room 2340 G.G. Brown Building, Ann Arbor, MI 48109.
4. Ph.D. Student, Dept. of Civil and Environmental Engineering, Univ. of Wisconsin-Madison, 2256 Engineering Hall, 1415 Engineering Dr., Madison, WI 53706.
5. Ph.D. Student, Dept. of Civil and Environmental Engineering, Univ. of Michigan, 2350 Hayward St., Room 1318 G.G. Brown Building, Ann Arbor, MI 48109.
6. Ph.D. Student, Dept. of Civil and Environmental Engineering, Univ. of Michigan, 2350 Hayward St., Room 2340 G.G. Brown Building, Ann Arbor, MI 48109.