1. Graduate Research Assistant, Dept. of Civil and Environmental Engineering, Rice Univ., 6100 Main St., MS-318, Houston, TX 77005.
2. Assistant Professor, Dept. of Civil and Environmental Engineering, Rice Univ., 6100 Main St., MS-318, Houston, TX 77005 (corresponding author).
3. Assistant Professor, Dept. of Civil and Environmental Engineering, Rice Univ., 6100 Main St., MS-318, Houston, TX 77005.
4. Professor and Associate Chair, School of Civil and Environmental Engineering, Georgia Institute of Technology, 790 Atlantic Dr., Atlanta, GA 30332-0355.