考虑非比例阻尼的基础隔震结构非线性反应谱研究

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振动与冲击 ›› 2016, Vol. 35 ›› Issue (17) : 207-212.

论文

杜永峰1 ,2，徐天妮2，包超2，陈凯2，洪娜2

作者信息 +

Study on Nonlinear Response Spectra for Base-Isolated Structures Considered Non-proportional Damping

Du Yongfeng1,2, Xu Tianni2, Bao Chao2, Chen Kai2, Hong Na2

Author information +

文章历史 +

摘要

对于基础隔震结构而言，其上部结构和隔震层的阻尼特性截然不同，往往呈现出明显的非比例阻尼特性。因此，有必要建立一种考虑非比例阻尼的隔震结构实用计算方法以便于推广和应用。通过用双自由度振动体系模拟基础隔震结构，在建立运动方程时考虑其非比例阻尼效应。通过对该简化模型进行动力时程分析，得到其在近场及远场地震记录作用下考虑非比例阻尼与瑞利阻尼的反应谱，并通过曲线拟合得到了非比例阻尼反应谱和瑞利阻尼反应谱的谱比值与结构自振周期之间的关系式。然后对某实际隔震工程进行地震响应分析，验证所提公式的合理性。

Abstract

The damping characteristics of upper structure and the isolation layer of base-isolated system are completely different, so the system often exhibits significant non-proportional damping characteristics. It is necessary to consider the non-proportional damping during seismic design of base-isolated structure; meanwhile this design method is convenient for promotion and application. The two degrees of freedom simplified model for the base-isolated structures is set up，and the non-proportional damping effect is thought over when establishing the motion equation Then the simplified model are analyzed and simultaneously obtained its response spectra which considered non-proportional damping and Rayleigh damping under the near-field and far-field ground motions, and get the calculation formula of the ratio between two response spectra and period by nonlinear curve fitting. Finally, the seismic response analysis for a real base-isolated structure is done, and verifies the reasonableness of the proposed formula.

导出引用

杜永峰1,2，徐天妮2，包超2，陈凯2，洪娜2. 考虑非比例阻尼的基础隔震结构非线性反应谱研究[J]. 振动与冲击, 2016, 35(17): 207-212

Du Yongfeng1,2, Xu Tianni2, Bao Chao2, Chen Kai2, Hong Na2. Study on Nonlinear Response Spectra for Base-Isolated Structures Considered Non-proportional Damping[J]. Journal of Vibration and Shock, 2016, 35(17): 207-212

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