1. Assistant Professor, Dept. of Civil and Architectural Engineering, Univ. of Wyoming, Dept. 3295, 1000 E. University Ave., Laramie, WY 82071 (corresponding author).
2. Associate Professor, Dept. of Civil, Architectural and Environmental Engineering, Univ. of Texas, 301 E. Dean Keeton Stop C1792, Austin, TX 78712.
3. Professor, Dept. of Civil, Architectural and Environmental Engineering, Univ. of Texas, 301 E. Dean Keeton Stop C1792, Austin, TX 78712.
4. Graduate Research Assistant, Dept. of Civil, Architectural and Environmental Engineering, Univ. of Texas, 301 E. Dean Keeton Stop C1792, Austin, TX 78712.