地震波励振を受ける剛体ブロックのロッキング振動

概要

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The effects of sliding motion of horizontal direction, amplitude and frequency characteristics of excitation on the stability of block shape structures have been investigated for El Centro and Kobe earthquake wave. A parametric study shows that rocking response is highly sensitive to the size of the block and the slenderness and the excitation in the low frequency range. For two blocks of the same aspect ratio coefficient of restitution subjected to the same excitation, the larger block always does not respond in smaller amplitude that the smaller block since the excitations of earthquake wave are not normal distribution statistically. Real damages by the Kobe earthquake show the proofs of the analytical results. In the case of the block of low aspect ratio, rocking does not occur and sliding motion occurs. In real earthquakes, a lot of damages by overturning of block shape structure as well as by sliding of the low aspect ratio blocks are reported.
沼津工業高等専門学校の論文
2006-01-31