1. Associate Professor, Dept. of Civil and Environmental Engineering, Yonsei Univ., Seoul, Korea (corresponding author).
2. Ph.D. Student, Dept. of Civil and Environmental Engineering, Yonsei Univ., Seoul, Korea.
3. Assistant Professor, Dept. of Civil and Environmental Engineering, Yonsei Univ., Seoul, Korea.
4. General Manager, International Contractors Association of Korea (ICAK), Seoul, Korea.