1. Assistant Professor, Dept. of Architectural Engineering, Dankook Univ., 152 Jukjeon-ro, Gyeonggi-do 448-701, Korea.
2. Professor, Dept. of Architecture and Architectural Engineering, Seoul National Univ., 599 Gwanak-ro, Seoul 151-744, Korea.
3. Assistant Professor, College of Civil Engineering, Hunan Univ., Yuelu Mountain, Changsha, Hunan 410082, China.
4. Assistant Professor, Dept. of Architectural Engineering, Chungbuk National Univ., 52 Naesudong-ro, Chungbuk-do 361-763, Korea (corresponding author).