1. Assistant Professor, Dept. of Civil Engineering, Ozyegin Univ., Cekmekoy, Istanbul 34987, Turkey.
2. Assistant Professor, Dept. of Civil and Environmental Engineering, National Univ. of Singapore, 1 Engineering Dr. 2, E1A 07-03, Singapore 117576.
3. Associate Professor, Dept. of Civil, Architectural, and Environmental Engineering, Univ. of Texas at Austin, 301 East Dean Keeton St., Stop C1748, Austin, TX 78712.
4. Assistant Professor, Dept. of Civil, Architectural, and Environmental Engineering, Univ. of Texas at Austin, 301 East Dean Keeton St., Stop C1748, Austin, TX 78712 (corresponding author).