1. Dept. of Civil Engineering, Gümüşhane Univ., 29000 Gümüşhane, TR (Corresponding author), e-mail: gunaydin61@hotmail.com.tr
2. Dept. of Civil Engineering, Karadeniz Technical Univ., 61080 Trabzon, TR, e-mail: sadanur@ktu.edu.tr
3. Dept. of Civil Engineering, Karadeniz Technical Univ., 61080 Trabzon, TR, e-mail: ahmetcan8284@hotmail.com
4. Dept. of Civil Engineering, Yıldız Technical Univ., 34349 Istanbul, TR, e-mail: bsevim18@hotmail.com
5. Dept. of Civil Engineering, Karadeniz Technical Univ., 61080 Trabzon, TR, e-mail: alemdar@ktu.edu.tr