1. Associcate Professor, Dept. of Civil Engineering, Karadeniz Technical Univ., 61080 Trabzon, Turkey (corresponding author).
2. Dept. of Civil Engineering, Karadeniz Technical Univ., 61080 Trabzon, Turkey.
3. Dept. of Civil Engineering of Technology Faculty, Karadeniz Technical Univ., 61080 Trabzon, Turkey.
4. Assistant Professor, Dept. of Civil Engineering, Gümüshane Univ., 29100 Gümüshane, Turkey.
5. Associcate Professor, Dept. of Civil Engineering, Karadeniz Technical Univ., 61080 Trabzon, Turkey.