1. Professor, Dept. of Architecture and Building Engineering, Tokyo Institute of Technology, M1-29, 2-12-1 O-okayama, Meguro-ku, Tokyo, 152-8552 (corresponding author).
2. Graduate Student, Dept. of Architecture and Building Engineering, Tokyo Institute of Technology, M1-29, 2-12-1 O-okayama, Meguro-ku, Tokyo, 152-8552.