1. Assistant Professor, Dept. of Civil Engineering, Istanbul Univ.–Cerrahpaşa, TR-34320 Avcılar, Istanbul, Turkey.
2. Professor, Dept. of Civil Engineering, Istanbul Univ.–Cerrahpaşa, TR-34320 Avcılar, Istanbul, Turkey (corresponding author).
3. Dept. of Civil Engineering, Istanbul Univ.–Cerrahpaşa, TR-34320 Avcılar, Istanbul, Turkey.