1. Associate Professor, Dept. of Civil Engineering, Anadolu Univ., 2 Eylül Kampüsü, Eskişehir 26555, Turkey (corresponding author).
2. Ph.D. Candidate, Dept. of Civil Engineering, Anadolu Univ., 2 Eylül Kampüsü, Eskişehir 26555, Turkey.
3. Associate Professor, Dept. of Civil Engineering, Middle East Technical Univ., Ankara 06531, Turkey.