1. Graduate Student, Dept. of Civil and Environmental Engineering, Seoul National Univ., 1 Gwanak-Ro, Gwanak-Gu, Seoul 08826, Korea.
2. Associate Professor, Dept. of Civil and Environment Engineering, Seoul National Univ., 1 Gwanak-Ro, Gwanak-Ku, Seoul 08826, Korea; Adjunct Professor, Institute of Construction and Environmental Engineering, 1 Gwanak-Ro, Gwanak-Ku, Seoul 08826, Korea.
3. Associate Professor, School of Construction Engineering, Kyungil Univ., Gyeongbuk 38428, Korea (corresponding author).