1. Associate Professor, Dept. of Architecture, Sakarya Univ., 54300 Sakarya, Turkey.
2. Research Assistant, Dept. of Civil Engineering, Inonu Bulvarı, Middle East Technical Univ., 06800 Ankara, Turkey.
3. Professor, Dept. of Civil Engineering, Inonu Bulvarı, Middle East Technical Univ., 06800 Ankara, Turkey (corresponding author).
4. Professor, Dean of Engineering, Ziya Gokalp Cad. No. 48, TED Univ., 06420 Ankara, Turkey.