1. Graduate Research Assistant, Dept. of Civil Engineering, Univ. of New Mexico, MSC01 1070, Albuquerque, NM 87131-0001.
2. Assistant Professor, Dept. of Civil Engineering Technology, Colorado State Univ.-Pueblo, Pueblo, CO 81001 (corresponding author).
3. Professor, Dept. of Civil Engineering, Univ. of New Mexico, MSC01 1070, Albuquerque, NM 87131-0001.