1. Professor, Dept. of Civil, Environmental, and Architectural Engineering, Univ. of Colorado Boulder, 428 UCB, Boulder, CO 80308 (corresponding author).
2. Ph.D. Student, Dept. of Civil, Environmental, and Architectural Engineering, Univ. of Colorado Boulder, Boulder, CO 80308.
3. Research Associate, Dept. of Mechanical Engineering, Univ. of Colorado Boulder, Boulder, CO 80308.
4. Associate Professor, Dept. of Civil and Environmental Engineering, Tufts Univ., 113 Anderson Hall, Medford, MA 02155.
5. Instructor, Dept. of Civil and Environmental Engineering, Seattle Univ., 900 Broadway, Seattle, WA 98122.