1. Research Professor, School of Civil, Environmental and Architectural Engineering, Korea Univ., 5 Anam-dong, Seongbuk-Gu, Seoul 136-701, Korea.
2. Graduate Student, School of Civil, Environmental and Architectural Engineering, Korea Univ., 5 Anam-dong, Seongbuk-Gu, Seoul 136-701, Korea.
3. Associate Professor, School of Civil, Environmental and Architectural Engineering, Korea Univ., 5 Anam-dong, Seongbuk-Gu, Seoul 136-701, Korea (corresponding author).
4. Managing Researcher, R&D Institute, Lotte Engineering and Development, 104 Wonhyo 1-ga, Yongsan-gu, Seoul 140-111, Korea.
5. POSCO Chair Professor, School of Civil, Environmental and Architectural Engineering, Korea Univ., 5 Anam-dong, Seongbuk-Gu, Seoul 136-701, Korea.