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《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

卷:

37卷

期数:

2020年01期

页码:

75-84

栏目:

出版日期:

2020-01-30

文章信息/Info

Title:

Influence of Mild Steel Damper on Floor Response Spectra of Building Structure

文章编号:

1673-2049(2020)01-0075-10

作者:

蒲武川,徐 熙,张华珺

(武汉理工大学 土木工程与建筑学院,湖北 武汉 430070)

Author(s):

PU Wu-chuan, XU Xi, ZHANG Hua-jun

(School of Civil Engineering and Architecture, Wuhan University of Technology, Wuhan 430070, Hubei, China)

关键词:

楼层反应谱;  软钢阻尼器;  被动控制;  非结构构件;  等价线性化

Keywords:

floor response spectra;  mild steel damper;  passive control;  non-structural component;  equivalent linearization

分类号:

TU311

DOI:

10.19815/j.jace.2019.01008

文献标志码:

A

摘要:

鉴于控制地震响应的软钢阻尼器可能显著改变结构系统的自振周期,结构抗震设计中有必要明确阻尼器对楼层非结构构件反应谱的影响。以已有的弹性结构楼层反应谱评估方法为基础,考虑主体结构与非结构构件周期比和主体结构黏滞阻尼比的影响,提出了黏滞阻尼减震结构的楼层反应谱预测公式。建立了非线性减震结构系统平均等价刚度和平均等价阻尼比的计算方法,基于等价线性系统提出了软钢阻尼器减震结构的楼层反应谱预测方法,并得到了楼层反应谱的性能曲线,用以描述阻尼器参数对非结构构件加速度响应的影响规律。研究结果表明:将等价线性化方法应用于软钢阻尼器减震结构能较好地进行非线性系统的楼层反应谱预测,修正的楼层反应谱预测公式可直接基于地震动弹性反应谱和减震结构等价参数估计楼层反应谱,可用于周期比为0.5～2、阻尼比为0.05～0.2的结构系统,该方法将为考虑非结构构件地震响应的减震结构优化设计提供有益参考。

Abstract:

In view of the fact that the mild steel damper controlling the seismic response might significantly change the natural vibration period of structural system, it is necessary to clarify the effect of the damper on the response spectrum of the non-structural members in the seismic design of the structure. Based on the existing evaluation method of floor response spectrum of elastic structure, considering the influence of periodic ratio of main structure and non-structural components and viscous damping ratio of main structure, the prediction formula of floor response spectrum of viscous damping structure was proposed. The calculation method of the average equivalent stiffness and the average equivalent damping ratio of the nonlinear damping structure system was established. Based on the equivalent linear system, the prediction method of the floor response spectrum of the mild steel damper structure was proposed. The performance curve of the floor response spectrum was obtained to describe the influence of the damper parameters on the acceleration response of the non-structural components. The results show that the equivalent linearization method can be used to predict the floor response spectrum of the non-linear system, and the modified formula can be directly used to estimate the floor response spectrum based on the elastic response spectrum of ground motion and the equivalent parameters of the damping structure. It is applicable for period ratio between 0.5 and 2, and damping ratio between 0.05 and 0.2. This method can be employed to aid structural engineers to choose an optimal damper capacity design considering the response of non-structural components.

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相似文献/References:

备注/Memo

备注/Memo:

收稿日期:2019-04-03
基金项目:湖北省自然科学基金项目(2015CFB489,2016CFA020)
作者简介:蒲武川(1980-),男,四川广安人,副教授,工学博士,E-mail:puwuchuan@whut.edu.cn。

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更新日期/Last Update: 2020-01-13