1. Graduate Student, Dept. of Civil and Environmental Engineering, KAIST, 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea.
2. Associate Professor, Dept. of Civil and Environmental Engineering, College of Engineering, Kongju National Univ., 1223-24 Cheonan-Daero, Subuk, Cheonan, Chungnam 31080, Republic of Korea (corresponding author).
3. Chief Research Engineer, Hyundai Engineering and Construction Co., Ltd., 75 Yulgok-ro, Jongno-gu, Seoul 03058, Republic of Korea.
4. Professor, Dept. of Civil and Environmental Engineering, KAIST, 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea.