世博轴阳光谷大型钢结构风致线性和非线性响应比较

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振动与冲击 ›› 2009, Vol. 28 ›› Issue (12) : 155-159.

论文

世博轴阳光谷大型钢结构风致线性和非线性响应比较

韩志惠1;周晅毅1;顾明1;张伟育2

作者信息 +

Comparison of Wind-induced Linear and Nonlinear Responses ofa Structure of Expo Axis

hihui Han1; Xuanyi Zhou1;Ming Gu1;Weiyu Zhang2

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文章历史 +

摘要

以世博轴阳光谷结构为研究对象，基于刚性模型风洞试验获得的表面风压分布结果，研究了时域内考虑几何非线性和不考虑几何非线性两种条件下计算得到的位移响应分布及位移和轴力响应的差别。结果表明，结构非线性效应相对较强的长悬挑边在大位移下出现刚度软化，使其刚度减小，竖向位移增加，非线性方法获得的响应值大于线性方法，但是差别在可接受范围之内；两种条件下计算的响应功率谱曲线反映了类似的能量分布。

Abstract

Based on the wind pressure data from the wind tunnel test, the distributions of the displacementsand the differences of the values of a structure of Expo Axis, which are obtained linearly and nonlinearly in thetime domain, are analyzed. The results indicate that the cantilevered part of high nonlinear behavior appearsstiffness softening. Because of that, the structure stiffness decreases and the displacement increases. Thedisplacement RSM values computed nonlinearly are greater than those computed linearly, but the differences areacceptable from the viewpoint of engineering application; the comparison of power spectral density curves showssimilar energy distributions.

导出引用

韩志惠;周晅毅;顾明;张伟育. 世博轴阳光谷大型钢结构风致线性和非线性响应比较[J]. 振动与冲击, 2009, 28(12): 155-159

hihui Han;Xuanyi Zhou;Ming Gu;Weiyu Zhang. Comparison of Wind-induced Linear and Nonlinear Responses ofa Structure of Expo Axis[J]. Journal of Vibration and Shock, 2009, 28(12): 155-159