1. Graduate Student, Dept. of Civil Engineering, Univ. of New Mexico, Albuquerque, NM 87131-0001.
2. Assistant Professor, Dept. of Civil Engineering, Univ. of New Mexico, Albuquerque, NM 87131-0001 (corresponding author).
3. Professor, Civil, Environmental and Architectural Engineering, Univ. of Colorado, Boulder, CO 80309-0428.
4. Associate Professor, Civil, Environmental and Architectural Engineering, Univ. of Colorado, Boulder, CO 80309-0428.