首层薄弱层框架结构的柱顶隔震性能分析
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摘要
以某首层架空的5层实际框架结构为背景,进行了首层为薄弱层的建筑结构柱顶隔震性能分析。时程分析表明:在7度地震作用下,隔震上部结构减震效果明显;下部结构(独立柱)在8度罕遇地震作用下其变形仍处于弹性阶段,证明了柱顶隔震技术显著地提高了首层薄弱层框架结构的抗震性能,增加了首层的变形能力,改善了首层薄弱的特点。同时分析了独立柱的受力与抗震设计,表明合理的独立柱设计提高了整体结构的地震安全性。
Taking a practical five-story frame-structure as background and the first floor is open;performance analysis for the first-floor weak structure is carried out,on which first-floor isolation technology is applied.Time-history analyses for the structures showed that vibration reduction effect of the superstructure is obvious under 7 degree earthquakes.The substructure(independent columns) is still in elastic deformation stage under 8 degree rare earthquakes,which proved that isolation technology on the top of column could improve the seismic behavior of the first-floor weak frame-structure,increase the deformation capacity of the first floor and change and improve the features of weak story.Meanwhile,mechanical analyses and seismic design of the independent columns are performed.The results indicated that rational design could improve the structure seismic safety.
Taking a practical five-story frame-structure as background and the first floor is open;performance analysis for the first-floor weak structure is carried out,on which first-floor isolation technology is applied.Time-history analyses for the structures showed that vibration reduction effect of the superstructure is obvious under 7 degree earthquakes.The substructure(independent columns) is still in elastic deformation stage under 8 degree rare earthquakes,which proved that isolation technology on the top of column could improve the seismic behavior of the first-floor weak frame-structure,increase the deformation capacity of the first floor and change and improve the features of weak story.Meanwhile,mechanical analyses and seismic design of the independent columns are performed.The results indicated that rational design could improve the structure seismic safety.
引文
[1]陆伟东,蓝宗建,刘伟庆.阻尼支撑控制结构薄弱层的设计方法研究[J].工程抗震与加固改造,2011,33(2)57-62.
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[13]杜东升,王曙光,刘伟庆,等.高层建筑组合隔震的设计方法及应用[J].东南大学学报:自然科学版,2010,40(5):1039-1046.
[2]潘鹏,曹海韵,齐玉军,等.底部薄弱层结构的柱顶隔震加固改造设计[J].工程抗震与加固改造,2009,31(6):69-73.
[3]祁皑.层间隔震技术评述[J].地震工程与工程振动,2004,24(6):114-120.
[4]黄襄云.层间隔震减震结构的理论分析和振动台试验研究[D].西安:西安建筑科技大学,2008:6.
[5]CHANG K C,HWANG J S,CHAN T C,et al.Applica-tion,R&D and design rules for seismic isolation and ener-gy dissipation systems for buildings and bridges in Taiwan[C]//10th World Conference on Seismic Isolation,Dissi-pation and Active Vibrations Control of Structures,Isolan-bul,[s.n.].2007,May28-31.
[6]祁皑,郑国琛,阎维明.考虑参数优化的层间隔震结构振动台试验研究[J].建筑结构学报,2009,30(2):8-16.
[7]MO Y L,CHANG Y F.Application of base isolation con-cept to soft first story buildings[J].Computers&Struc-tures,1995,55(5):883-896.
[8]马长飞,谭平,张亚辉,等.考虑P-Δ效应的柱顶隔震结构的动力响应分析[J].土木工程学报,2010,43:230-234.
[9]中华人民共和国行业标准.GB 50011—2001建筑抗震设计规范[S].北京:中国建筑工业出版社,2008.
[10]党育,杜永峰,李慧.基础隔震结构设计及施工指南[M].北京:水利水电知识产权出版社,2007.
[11]CECS 126叠层橡胶支座隔震技术规程[S].北京:中国工程建设标准化协会标准,2001.
[12]金星,韦永祥,张红才,等.基于强震观测的隔震结构地震反应分析[J].地震工程与工程振动,2009,29(2):19-28.
[13]杜东升,王曙光,刘伟庆,等.高层建筑组合隔震的设计方法及应用[J].东南大学学报:自然科学版,2010,40(5):1039-1046.
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