1. Associate Professor, Dept. of Civil Engineering, New Mexico State Univ., Hernandez Hall, Box 30001, MSC 3CE, Las Cruces, NM 88003 (corresponding author).
2. Bridge EIT, HDR Inc., 17111 Preston Rd., Dallas, TX 75248-1232.
3. Associate Design Engineer II, Fluor Enterprises Inc., One Fluor Daniel Dr., Sugar Land, TX 77478-3899.