1. Professor, Dept. of Civil Engineering, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya, 466-8555, Japan.
2. Associate Professor, Dept. of Civil Engineering, Toyota National College of Technology, Eisei-cho, Toyota, 471-8525, Japan (corresponding author).
3. Graduate Student, Dept. of Civil Engineering, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya, 466-8555, Japan.