1. Research Assistant, Civil Engineering Dept., New Mexico State Univ., Las Cruces, NM 88003.
2. Professor, Civil Engineering Dept., New Mexico State Univ., Las Cruces, NM 88003 (corresponding author). E-mail: nkhandan@nmsu.edu)
3. Associate Professor, Engineering Technology Dept., New Mexico State Univ., Las Cruces, NM 88003.