1. Associate Professor, Dept. of Civil Engineering, Univ. of Arkansas, Fayetteville, AR 72701 (corresponding author).
2. Graduate Research Assistant, Dept. of Civil Engineering, Univ. of Arkansas, Fayetteville, AR 72701.
3. University Professor, Dept. of Civil Engineering, Univ. of Arkansas, Fayetteville, AR 72701.
4. Master Technician, Dept. of Civil Engineering, Univ. of Arkansas, Fayetteville, AR 72701.