Investigation of Longitudinal Aseismic Capacity for Underground Structures and Application to Seismic Design

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Earthquake damage to underground structures of which extent can not be ignored are too numerous to enumerate in the recent large earthquakes after the 1923 Kanto Earthquake. However, the issue to be improved is the absence of perspective that the underground structures with spatially extent should be considered as a line, a plane or a volume structures with 3-dimensional behavior. In this study, we intend to deal with the underground structures comprehensively from their input ground motions to seismic behavior. We conducted the analyses and discussions by considering the suitable aseismic design and countermeasures.