Dynamic Buckling of High Pier with Two Ends Supported under Impulse Loads

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Journal of Vibration and Shock ›› 2009, Vol. 28 ›› Issue (12) : 1-3.

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Dynamic Buckling of High Pier with Two Ends Supported under Impulse Loads

Luo Song-nan;Li Li;Zhou Hui;Song Jun-han

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Abstract

Considering the influence of transverse shear deformation and large displacement, the basic non-linear dynamic equations of high pier under impulse loads are established. By supposing the displacement shape functions and applying the Galerkin method, the dynamical equations about times are gained. By using the four steps Runge-Kutta method, the dynamical equations are resolved, the critical loads and displacement response curves are obtained, and the influence of the vary kinds of loads and the geometry parameters of high pier on the critical loads are analyzed. The loads-displacement curves under triangle impulse loads are compared with under rectangle impulse loads. The displacement response curves under impulse loads with different peaks and the softness- critical loads curves under rectangle impulse loads are given. The influence of the different persist time of rectangle impulse loads on the critical loads is analyzed.

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high pier / impulse load / displacement response / dynamic bucklingEmil:luosongnan@yahoo.com.cn

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Luo Song-nan;Li Li;Zhou Hui;Song Jun-han. Dynamic Buckling of High Pier with Two Ends Supported under Impulse Loads [J]. Journal of Vibration and Shock, 2009, 28(12): 1-3