1. Associate Professor, Dept. of Civil Engineering, Univ. of New Mexico, Albuquerque, NM 87131-0001.
2. Professor, Civil, Environmental and Architectural Engineering, Univ. of Colorado, Boulder, CO 80309-0428.
3. Professor, Civil, Environmental and Architectural Engineering, Univ. of Colorado, Boulder, CO 80309-0428 (corresponding author).
4. Graduate Assistant, Civil, Environmental and Architectural Engineering, Univ. of Colorado, Boulder, CO 80309-0428.
5. Assistant Professor, College of Science, Engineering and Technology, Minnesota State Univ., Mankato, MN 56001; formerly, Research Associate, Civil, Environmental and Architectural Engineering, Univ. of Colorado, Boulder, CO 80309-0428.