1. Graduate Student, Dept. of Civil, Environmental, and Architectural Engineering, Univ. of Colorado, Boulder, CO 80309-0428.
2. Assistant Professor, Dept. of Civil, Environmental, and Architectural Engineering, Univ. of Colorado, Boulder, CO 80309-0428 (corresponding author).
3. Associate Professor, Dept. of Technology Systems, East Carolina Univ., Greenville, NC 27858-4353.
4. Graduate, Dept. of Civil, Environmental, and Architectural Engineering, Univ. of Colorado, Boulder, CO 80309-0428.