1. Department of Civil and Environmental Engineering, Waseda University, 3-4-1, Okubo, Shinjuku-ku, Tokyo 169-0072, Japan.
2. Nippon Steel Chemical & Material Co., Ltd., 13-1, Nihonbashi 1-chome, Chuo-ku, Tokyo 103-0027, Japan.
3. Civil Engineering Group, Infrastructural Use Department, Composite Division, Nippon Steel Chemical & Material Co., Ltd., Tokyo 103-0027, Japan.
4. Administration & Planning Group, Composite Development Department, Composite Division, Nippon Steel Chemical & Material Co., Ltd., Tokyo 103-0027, Japan.
5. Reinforcing Materials Sales Group, Infrastructural Use Department, Composite Division, Nippon Steel Chemical & Material Co., Ltd., Tokyo 103-0027, Japan.