1. NIIGATA UNIVERSITY, Graduate school of Science and Technology(8050, Ikarashi Nino-cho, Nishi-ku, Niigata-shi, Niigata 950-2181, Japan)
2. NIIGATA UNIVERSITY, Department of Civil Engineering(8050, Ikarashi Nino-cho, Nishi-ku, Niigata-shi, Niigata 950-2181, Japan)
3. NIIGATA UNIVERSITY, Graduate school of Science and Technology, JSPS Research Fellow(8050, Ikarashi Nino-cho, Nishi-ku, Niigata-shi, Niigata 950-2181, Japan)