不規則構造に対する地震波の挙動 : その1.崖地形が地震動に及ぼす影響

概要

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It is very important to clarify the earthquake ground motion characteristics on and around cliffs, since we have experienced heavy damage near cliffs due to earthquakes. Recent good examples are the disaster at many cliffs in the Izu Peninsula due to the 1974 Izu-Hanto-Oki earthquake and the 1978 Izu-Ohshima-Kinkai earthquake. The finite element method which is a powerful tool for determining the effect of structural irregularities on the wave propagation was employed to clarify the problems. Both the characteristics associated with time and frequency domains for plane SH and SV waves which propagate in a uniform and linear-elastic material with Poisson's ratio of 0.29 were studied. The source is a rectangular pulse, the duration of which is short enough to allow easy identification of the scattered waves.
1982-03-31