1. Department of Architecture and Architectural Engineering; Kyoto University; Katsura, Nishikyo; Kyoto; 615-8540; Japan
2. E-Defense, National Research Institute for Earth Science and Disaster Prevention; Shinjimicho, Miki; Hyogo; 673-0515; Japan
3. Department of Materials Science and Engineering; Tohoku University; Aoba; Sendai; 980-8579; Japan