1. NIHON UNIVERSITY, Dept. of Civil Engineering, College of Industrial Technology(1-2-1, Izumi-cho, Narashino-shi, Chiba 275-8575, Japan)
2. NIHON UNIVERSITY, Graduate School of Civil Engineering, College of Industrial Technology(1-2-1, Izumi-cho, Narashino-shi, Chiba 275-8575, Japan)
3. JFE CIVIL ENGINEERING & CONSTRUCTION CORPORATION, Technical Development Dept.(2-17-4, Kuramae, Taito-ku, Tokyo 111-0051, Japan)
4. JFE CIVIL ENGINEERING & CONSTRUCTION CORPORATION, Social Infrastructure Dept.(2-17-4, Kuramae, Taito-ku, Tokyo 111-0051, Japan)