1. Associate Professor, Dept. of Civil and Earth Resources Engineering, Kyoto Univ., Nishikyo-ku, Kyoto 615-8540, Japan.
2. Lecturer, School of Civil and Environmental Engineering, Univ. of New South Wales, Sydney, NSW 2052, Australia; formerly, Ph.D. Student, Dept. of Civil and Earth Resources Engineering, Kyoto Univ., Nishikyo-ku, Kyoto 615-8540, Japan.
3. Chairman, ABRAND Civil Design Inc., Tehran 16518-94675, Iran; formerly, Ph.D. Student, Dept. of Civil and Earth Resources Engineering, Kyoto Univ., Nishikyo-ku, Kyoto 615-8540, Japan.
4. Professor Emeritus, Dept. of Civil and Earth Resources Engineering, Kyoto Univ., Nishikyo-ku, Kyoto 615-8540, Japan (corresponding author).