Abstract
During the 1995 Hyogo-ken Nanbu earthquake, strong motions were recorded at two neighboring sites, Takatori (TKT) and Shin-Nagata (SNT), located in the western part of the damage belt in Kobe City. The latter, observed at the basement of a high-rise building, was less than half the amplitude recorded at TKT. This difference has gone unresolved in terms of the relationship between ground motion level and actual damage situation. This study investigate input earthquake motion to the high-rise SRC building at SNT during the 1995 Hyogo-ken Nanbu earthquake using three approaches: (1) a 3-D finite difference method to elucidate the spatial variation considering both the seismic fault and the 3-D basin-edge structure, (2) amplification characteristics using recorded motions after the 1995 Hyogo-ken Nanbu earthquake at SNT, and (3) the foundation input motion analysis, taking into account the strong nonlinearity of the surrounding surface soil.
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