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浙江大学学报(工学版)
浙江大学学报(工学版)  2024, Vol. 58 Issue (9): 1866-1873    DOI: 10.3785/j.issn.1008-973X.2024.09.011
土木与建筑工程     
消能摇摆钢框架结构地震反应的计算方法
张文津1,2(),李国强2,胡晓华1,张惊宙3,黄博滔4,赵生智1
1. 中建八局 浙江建设有限公司，浙江 杭州 310000
2. 同济大学 土木工程学院，上海 200092
3. 广州大学 土木工程学院，广东 广州 510000
4. 浙江大学 建筑工程学院，浙江 杭州 310058
Calculation method of seismic response for steel frame coupled with rocking structure and dampers
Wenjin ZHANG1,2(),Guoqiang LI2,Xiaohua HU1,Jingzhou ZHANG3,Botao HUANG4,Shengzhi ZHAO1
1. Zhejiang Construction Co. Ltd, China Construction Eighth Engineering Division, Hangzhou 310000, China
2. College of Civil Engineering, Tongji University, Shanghai 200092, China
3. College of Civil Engineering, Guangzhou University, Guangzhou 510000, China
4. College of Civil Engineering and Architecture, Zhejiang University, Hangzhou 310058, China
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摘要：

消能摇摆钢框架结构(SRF)通过摇摆钢桁架抑制各楼层发生不均匀地震变形，通过位于转动底脚的阻尼器消耗地震输入能量，抗震性能良好. 推导消能摇摆钢框架结构的弹性计算方法，提出SRF等效单自由度（SDOF）分析模型，基于等效线性化原理给出SRF非线性地震反应的计算方法. 采用ATC-63推荐的地震动记录集进行结构弹塑性地震反应分析，得到SRF在3类地震动激励下的延性需求谱. 研究表明，由弹性计算方法可以得到SRF在水平作用下的力学反应，等效单自由度分析模型能准确描述整体结构的受力机理和非线性地震反应，依此推导所得的SRF地震反应计算方法可用于预估实际结构的地震反应. 相比于普通钢框架结构，SRF屈服后刚度比的取值范围更大，计算所得的延性需求谱与之匹配，可作为设计参考.
关键词： 摇摆结构;  阻尼器;  地震反应;  等效单自由度模型;  延性需求谱    
Abstract:

Steel frame coupled with rocking structure and dampers (SRF) achieves superior seismic behavior under earthquake excitation, with nonuniform inter-story drift restrained by rocking truss structure and inputting-energy dissipated by dampers located around rotational point. The elastic calculation method of SRF was deduced. The equivalent model of single degree of freedom (SDOF) was established for SRF and the evaluation method of nonlinear seismic response for SRF was promoted by equivalent linearization method. Meanwhile, the ductility demand spectra under three types of earthquake records recommended by ATC-63 was developed based on time-history dynamic analysis results. Results show that the elastic calculation method can be used to calculate the structural response of SRF under lateral loads. Structural mechanism and nonlinear seismic response under earthquake excitation can be accurately evaluated by the equivalent model of SDOF and the seismic response of actual structure can be predicted by the deduced seismic response calculation method of SRF. Ductility demand spectra for SRF obtained by SDOF is appropriate to the fact that post-yield ratio of SRF is greater than that of the steel-frame structures, which can be referred in the practical design.
Key words: rocking structure    damper    seismic response    equivalent model of single degree of freedom    ductility demand spectra
收稿日期: 2023-07-18 出版日期: 2024-08-30
CLC:  TU 4  
基金资助: 国家十四五重点研发计划资助项目（2022YFC3801900）.
作者简介: 张文津（1993—），男，工程师，博士，从事建筑结构抗震与施工分析研究. orcid.org/0009-0001-0029-3822. E-mail：1150744@tongji.edu.cn
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张文津
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引用本文:

张文津,李国强,胡晓华,张惊宙,黄博滔,赵生智. 消能摇摆钢框架结构地震反应的计算方法[J]. 浙江大学学报(工学版), 2024, 58(9): 1866-1873.

Wenjin ZHANG,Guoqiang LI,Xiaohua HU,Jingzhou ZHANG,Botao HUANG,Shengzhi ZHAO. Calculation method of seismic response for steel frame coupled with rocking structure and dampers. Journal of ZheJiang University (Engineering Science), 2024, 58(9): 1866-1873.

链接本文:

https://www.zjujournals.com/eng/CN/10.3785/j.issn.1008-973X.2024.09.011    或    https://www.zjujournals.com/eng/CN/Y2024/V58/I9/1866

图 1  消能摇摆钢框架结构示意图
图 2  SRF的简化分析模型
图 3  SRF等效单自由度分析模型
图 4  SRF等效SDOF的弹塑性刚度特性
参数数值参数数值
kf /(kN·m?1)2124.6kbrc /(kN·m?1)44506.2
Dy2 /m0.1080Dy1 /m0.0063
Ff /kN229.5Fbrc /kN280.4
αbrc0.008αf0.055
meq /t271.7——
表 1  SDOF基础计算参数
图 5  SRF与SDOF弹塑性地震反应的比较
图 6  SDOF等效“双折线”弹塑性刚度模型
图 7  SRF的延性需求谱
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