深く埋込まれた構造物の地震時側面土圧の挙動に関する実験的研究

概要

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Analytical studies concerning lateral seismic earth pressure on a building model are summarized as follows. 1. Lateral earth pressure on a deeply embedded building model during an earthquake is composed of relatively long-period lateral earth pressure with the same phases on opposite sides and short-period lateral earth pressure with reversed phases on opposite sides, of which period is shorter than the fundamental natural frequncy of the building. 2. The observed characteristics of lateral earth pressures, concerning amplitude and phase, can be well reproduced by multi-input analysis based on the observed waves under the ground. 3. Amplitude and phase of lateral earth pressure are remarkably influenced by the incident angles of input motions. The observed amplitude and phase of lateral earth pressure are well reproduced by analyses with the assumption of 5 to 10 degrees as the incident angle of input motion. These angles are coincident with the general incident angles of actual earthquakes.
1999-02-28