1. Ph.D. Candidate, Dept. of Civil, Environmental and Architectural Engineering, Korea Univ., Anam-Dong, Seongbuk-gu, Seoul 136-713, Republic of Korea.
2. Assistant Professor, Dept. of Architectural Engineering, Chungju National Univ., 72 Daehak-ro, Chungju-si, Chungbuk 380-702, Republic of Korea.
3. Professor, Dept. of Civil, Environmental, and Architectural Engineering, Korea Univ., Anam-Dong, Seongbuk-gu, Seoul 136-713, Republic of Korea.
4. Senior Research Fellow, Korea Institute of Construction Technology, 3211 Daewha-Dong, Ilsan-Gu, Goyang-Si, Gyeonggi-Do 411-712, Republic of Korea.