消能立柱加固单跨框架结构原理与效果分析
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摘要
针对单跨框架结构提出一种消能立柱加固方案,介绍其构造形式及加固原理,并结合某5层单跨框架结构教学楼的工程算例,采用ETABS和PERFORM-3D分别对原结构及消能立柱加固结构进行多遇地震下的弹性时程分析和罕遇地震下的弹塑性时程分析,并对消能立柱中钢柱与剪切钢板阻尼器的刚度比、对结构的附加刚度比进行罕遇地震作用下的参数分析。结果表明:1消能立柱加固单跨框架结构的加固原理明确、可行,具有良好的加固效果;2多遇地震作用下,消能立柱加固增大了结构的抗侧刚度、冗余度及抗震防线,可有效控制原结构的层间位移角以满足规范要求;罕遇地震作用下,消能立柱可有效控制单跨框架结构的整体倒塌破坏,实现了"强柱弱梁"的设计要求;3消能立柱中的钢柱与剪切钢板阻尼器的刚度比宜取2或3;4消能立柱对结构的附加刚度比建议选取1~1.5之间。
This paper proposed a new strategy of adding energy-dissipated column for retrofit of single span frame structures, and introduced its basic construction along with strengthening mechanism. Based on the practical engineering case of a five-storey single span frame structure(i.e. school building), the software ETABS and PERFORM-3D were used to conduct comparative analyses of the original structure and the retrofitted structure with energy-dissipated columns through time-history method under frequent earthquake and rare earthquake, respectively, and then to make the parametric analysis of different horizontal stiffness ratio between supporting column and damper, along with the added stiffness ratio between energy-dissipated columns and bare frame under rare earthquake. The analysis results indicate that:(a) the strengthening mechanism for this retrofit strategy of adding energy-dissipated columns to single span frame structure is clear and available, which is of well-performed retrofit effect.(b) the energy-dissipated columns can provide the extra lateral stiffness, redundancy and seismic lines for the original structure to control its inter- storey drifts under frequent earthquake, and protect the single span frame structure from serious damages or even collapse by acquiring the design concept of "strong column and weak beam" under rare earthquake.(c) the horizontal stiffness ratio between supporting column and damper in the energy-dissipated column is recommended to be 2 or 3.(d) the added stiffness ration between energy-dissipated columns and bare frame is suggested to have a value between 1 and 1.5.
This paper proposed a new strategy of adding energy-dissipated column for retrofit of single span frame structures, and introduced its basic construction along with strengthening mechanism. Based on the practical engineering case of a five-storey single span frame structure(i.e. school building), the software ETABS and PERFORM-3D were used to conduct comparative analyses of the original structure and the retrofitted structure with energy-dissipated columns through time-history method under frequent earthquake and rare earthquake, respectively, and then to make the parametric analysis of different horizontal stiffness ratio between supporting column and damper, along with the added stiffness ratio between energy-dissipated columns and bare frame under rare earthquake. The analysis results indicate that:(a) the strengthening mechanism for this retrofit strategy of adding energy-dissipated columns to single span frame structure is clear and available, which is of well-performed retrofit effect.(b) the energy-dissipated columns can provide the extra lateral stiffness, redundancy and seismic lines for the original structure to control its inter- storey drifts under frequent earthquake, and protect the single span frame structure from serious damages or even collapse by acquiring the design concept of "strong column and weak beam" under rare earthquake.(c) the horizontal stiffness ratio between supporting column and damper in the energy-dissipated column is recommended to be 2 or 3.(d) the added stiffness ration between energy-dissipated columns and bare frame is suggested to have a value between 1 and 1.5.
引文
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[3]袁兴仁,张鹏程,林树枝,等.利用加设钢支撑改变单跨框架结构体系的抗震加固效果研究[J].工程抗震与加固改造,2011,33(2):104-111(Yuan Xingren,Zhang Pengcheng,Lin Shuzhi,et al.Study on single-span RC frame reinforced with steel truss system[J].Earthquake Resistant Engineering and Retrofitting,2011,33(2):104-111(in Chinese))
[4]曲哲,张令心.日本钢筋混凝土结构抗震加固技术现状与发展趋势[J].地震工程与工程振动,2013,33(4):61-74(Qu Zhe,Zhang Lingxin.State of the art and development tendency of seismic retrofit for reinforced concrete structures in Japan[J].Journal of Earthquake Engineering and Engineering Vibration,2013,33(4):61-74(in Chinese))
[5]周云.耗能减震加固技术与设计方法[M].北京:科学出版社,2006
[6]何志明,周云,陈清祥.剪切钢板阻尼器研究与应用进展[J].地震工程与工程振动,2 012,32(6):124-135(He Zhiming,Zhou Yun,Chen Qingxiang.Advance in research and application of steel shear panel dampers[J].Journal of Earthquake Engineering and Engineering Vibration,2012,32(6):124-135(in Chinese))
[7]李杨.中小学建筑混凝土结构抗震性能研究[D].西安:西安建筑科技大学,2010(Li Yang.The seismic performance of reinforced concrete structures for the primary and middle buildings[D].Xi’an:Xi’an University of Architecture and Technology,2010(in Chinese))
[8]GB 50011—2010建筑抗震设计规范[S].北京:中国建筑工业出版社,2010(GB 50011—2010 Code for seismic design of buildings[S].Beijing:China Architecture and Building Press,2010(in Chinese))
[9]Mander J B,Priestley M J N,Park R.Observed stressstrain behavior of confined concrete[J].Journal of Structural Engineering,ASCE,1988,114(8):1837-1849
[10]曾明.PERFORM-3D基本操作与实例[M].北京:中国铁道出版社,2013
[11]尹庆利,张东海,周云.耗能腋撑钢筋混凝土框架结构减震分析[J].土木工程学报,2010,43(S):235-242(Yin Qingli,Zhang Donghai,Zhou Yun.Vibration reduction analysis of the new system of reinforced concrete frame with energy dissipation haunch braces[J].China Civil Engineering Journal,2010,43(S):235-242(in Chinese))
[2]王亚勇,白雪霜.台湾921地震中钢筋混凝土结构震害特征[J].工程抗震,2001,(1):3-7(Wang Yayong,Bai Xueshuang.Damage features of R.C.structures in the September 21,1999 Taiwan earthquake[J].Earthquake Resistant Engineering,2001,(1):3-7(in Chinese))
[3]袁兴仁,张鹏程,林树枝,等.利用加设钢支撑改变单跨框架结构体系的抗震加固效果研究[J].工程抗震与加固改造,2011,33(2):104-111(Yuan Xingren,Zhang Pengcheng,Lin Shuzhi,et al.Study on single-span RC frame reinforced with steel truss system[J].Earthquake Resistant Engineering and Retrofitting,2011,33(2):104-111(in Chinese))
[4]曲哲,张令心.日本钢筋混凝土结构抗震加固技术现状与发展趋势[J].地震工程与工程振动,2013,33(4):61-74(Qu Zhe,Zhang Lingxin.State of the art and development tendency of seismic retrofit for reinforced concrete structures in Japan[J].Journal of Earthquake Engineering and Engineering Vibration,2013,33(4):61-74(in Chinese))
[5]周云.耗能减震加固技术与设计方法[M].北京:科学出版社,2006
[6]何志明,周云,陈清祥.剪切钢板阻尼器研究与应用进展[J].地震工程与工程振动,2 012,32(6):124-135(He Zhiming,Zhou Yun,Chen Qingxiang.Advance in research and application of steel shear panel dampers[J].Journal of Earthquake Engineering and Engineering Vibration,2012,32(6):124-135(in Chinese))
[7]李杨.中小学建筑混凝土结构抗震性能研究[D].西安:西安建筑科技大学,2010(Li Yang.The seismic performance of reinforced concrete structures for the primary and middle buildings[D].Xi’an:Xi’an University of Architecture and Technology,2010(in Chinese))
[8]GB 50011—2010建筑抗震设计规范[S].北京:中国建筑工业出版社,2010(GB 50011—2010 Code for seismic design of buildings[S].Beijing:China Architecture and Building Press,2010(in Chinese))
[9]Mander J B,Priestley M J N,Park R.Observed stressstrain behavior of confined concrete[J].Journal of Structural Engineering,ASCE,1988,114(8):1837-1849
[10]曾明.PERFORM-3D基本操作与实例[M].北京:中国铁道出版社,2013
[11]尹庆利,张东海,周云.耗能腋撑钢筋混凝土框架结构减震分析[J].土木工程学报,2010,43(S):235-242(Yin Qingli,Zhang Donghai,Zhou Yun.Vibration reduction analysis of the new system of reinforced concrete frame with energy dissipation haunch braces[J].China Civil Engineering Journal,2010,43(S):235-242(in Chinese))
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