1. Postdoctoral Research Fellow, Dept. of Civil Engineering, Yamaguchi Univ., 2-16-1 Tokiwadai, Ube, Yamaguchi, Japan (corresponding author).
2. Professor, Dept. of Civil Engineering, Yamaguchi Univ., 2-16-1 Tokiwadai, Ube, Yamaguchi, Japan.
3. Senior Lecturer, Univ. of Auckland, Private Bag 92019, Auckland, New Zealand. E-mail: r.orense@auckland.ac.nz
4. NPEEE Postdoctoral Fellow, Yamaguchi Univ., 2-16-1 Tokiwadai, Ube, Yamaguchi, Japan; formerly, Assistant Professor, Dept. of Civil Engineering, Siddaganga Institute of Technology, Tumkur, India.
5. Graduate Student, Yamaguchi Univ. Graduate School of Science and Engineering, 2-16-1 Tokiwadai, Ube, Yamaguchi, Japan.