1. Associate Professor, Dept. of Civil Engineering, Karadeniz Technical Univ., Trabzon 61080, Turkey (corresponding author).
2. Research Assistant, Dept. of Civil Engineering, Gümüşhane Univ., Gümüşhane 29100, Turkey.
3. Associate Professor, Dept. of Civil Engineering, Yıldız Technical Univ., Istanbul 34220, Turkey.
4. Professor, Dept. of Civil Engineering, Karadeniz Technical Univ., Trabzon 61080, Turkey.
5. Associate Professor, Dept. of Civil Engineering, Karadeniz Technical Univ., Trabzon 61080, Turkey.