Proceedings of the
8th International Symposium on Geotechnical Safety and Risk (ISGSR)
14 – 16 December 2022, Newcastle, Australia
Editors: Jinsong Huang, D.V. Griffiths, Shui-Hua Jiang, Anna Giacomini, Richard Kelly
doi:10.3850/978-981-18-5182-7_13-009-cd
Applicability of ROM to Seismic Response Analysis of Caisson-Type Seismically Strengthened Quay Walls against Level 2 Ground Motion
1Coastal Development Institute of Technology, 1-14-2 Nishi-Sinbashi Minato-ku, Tokyo, 105-0003, Japan
2Ports and Harbors Bureau, Ministry of Land, Infrastructure, Transportation and Tourism, 2-1-3 Kasumigaseki, Chiyoda-ku, Tokyo, 100-8918, Japan
3Department of Civil Environmental Engineering AIS Lab. (Advanced Infrastructure Systems), Tohoku University, 6-6-06 Aramaki Aza Aoba, Aoba-ku, Sendai, Miyagi, 980-8579, Japan
4ECOH CORPORATION, 2-6-4 Kita-Ueno, Taito-ku, Tokyo, 110-0014, Japan
5National Institute of Land and Infrastructure Management, Ministry of Land, Infrastructure, Transportation and Tourism, 3-1-1 Nagase, Yokosuka-shi, Kanagawa, 239-0826, Japan
ABSTRACT
: In the performance verification of seismically strengthened quay walls against level 2 ground motion, seismic response analysis is performed for only one or a few combinations of input variables, and the uncertainties associated with each design variable are often not taken into account. In this study, the applicability of the Reduced Order Model (ROM), which has been previously studied, to the results of 2D-FEM seismic response analysis of a caisson-type quay wall against level 2 ground motion is confirmed in order to introduce the uncertainty of each design variable in the performance verification of port structures against level 2 ground motion, and to extend the reliability-based design method to spatio-temporal analysis based on spatio-temporal distribution of each physical quantity such as displacement and hereinafter referred as to excess pore water pressure ratio (hereinafter referred as to epwpr). The results show that the predictions in ROM can accurately reproduce the response values in 2D-FEA, especially for displacement, even with a relatively small number of modes.
Keywords: Reliability-based design, Reduced Order Model, Caisson-type quay wall, 2D Seismic response analysis.
