地下街の耐震性に対する高層ビルの地震時挙動の影響

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  • EFFECTS OF EARTHQUAKE BEHAVIORS OF HIGH BUILDINGS ON SEISMIC SAFETY OF UNDERGROUND SHOPPING ARCADE

説明

Generally, the underground is thought to be safer than the ground, because the acceleration amplitudes of earthquake motions tend to be smaller in the underground. However, it is considered that the seismic safety of structures will largely affected by the mutual effects between the ground structure and the underground structure during earthquakes. Then, we made 3-D dynamic analyses regarding the coupled subway - underground shopping arcade - high building system in order to evaluate the effects of earthquake behaviors of high buildings on the underground shopping arcade. As a result, it is considered that the high buildings will behave out of phase with each other, and that the dynamic stresses around the connecting parts between the underground shopping arcade and the high buildings will be largely changed by the displacement behaviors of high buildings. In order to realize earthquake disaster prevention in urban area, mutual effects between the underground structures and the ground structures shall be taken into account.

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