Dynamic buckling of the high pier under the foundation perpendicular motion by earthquake

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Journal of Vibration and Shock ›› 2011, Vol. 30 ›› Issue (11) : 157-160.

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Dynamic buckling of the high pier under the foundation perpendicular motion by earthquake

Luo Song-nan; Song Jun-han; Feng Xin

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Abstract

Considering the influence of the large deformation, the non-linear dynamic equations of high pier under the foundation Perpendicular motion by earthquake are established. By supposing the displacement shape function and applying the Galerkin method, the dynamic equations about time are gained. By processing numerical calculation, the displacement response curves of the high pier under the foundation Perpendicular motion by earthquake with different magnitude and the overall process from the transverse vibration to the instability of the high pier are given. The critical seismic acceleration and the instability time are obtained. The influence of the different seismic peak, the slenderness ratio and the weight of the bridge on the displacement response, the critical seismic acceleration and the instability time are analyzed.

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foundation / Perpendicular motion / high pier / displacement response / dynamic buckling

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Luo Song-nan;Song Jun-han;Feng Xin. Dynamic buckling of the high pier under the foundation perpendicular motion by earthquake[J]. Journal of Vibration and Shock, 2011, 30(11): 157-160