1. Assistant Professor, Civil Engineering Technology, Colorado State Univ. Pueblo, 2200 Bonforte Blvd., Pueblo, CO 81001 (corresponding author).
2. Former Graduate Student, Dept. of Civil Engineering, Univ. of New Mexico, Albuquerque, NM 87131.
3. Professor, Dept. of Civil Engineering, Univ. of New Mexico, Albuquerque, NM 87131.