1. Associate Professor, Dept. of Civil Engineering, Tohoku Univ., Aramaki Aza-Aoba 6-6-06, Aoba-ku, Sendai, Miyagi 980-8579, Japan (corresponding author). ORCID: .
2. Professor, Dept. of Civil and Environmental Engineering, Nagoya Univ., Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8603, Japan. ORCID: .
3. Pipeline Network Company Pipeline Dept., Toho Gas Co., Ltd., 19-18 Sakurada-cho, Atsuta-ku, Nagoya, Aichi 456-8511, Japan.