基于性能的方钢管混凝土框架结构地震易损性分析
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摘要
钢-混凝土组合结构由于兼有钢结构和混凝土结构的优点,近年来得到了迅速发展和广泛应用,目前已成为我国高层建筑领域内应用较多的一种结构形式。虽然在地震区越来越多地采用这种新型的结构,但迄今为止还没有发现对钢-混凝土组合结构的地震易损性进行过研究的文献。因此给出一种基于性能的结构整体地震易损性分析方法,该方法既考虑了结构本身的不确定性,又考虑了地震动输入的不确定性。并定义了结构整体和楼层的四个极限破坏状态,从而提出了基于结构极限破坏状态确定结构抗震性能水平限值的方法。最后采用该方法对两个不同类型的方钢管混凝土框架结构进行基于性能的地震易损性分析,得到结构的易损性曲线,对结构的易损性能进行评估和分析,并比较了两个结构的易损性能。
Steel-concrete composite structures,which possess the advantages of both steel structures and concrete structures,have been quickly developped and widely used. Up to now,it has been a popular structure form for high-rise buildings. Although composite structures have been more and more used in earthquake regions,relevant fragility analysis is not available in the literature. A performance-based fragility analysis method is proposed,with uncertainties due to variability of ground motion characteristics and structures taken into consideration. Four ultimate damage states for entire structure and interstory are defined,and based on which,a method for solving the limit values of the four performance levels is put forward. Seismic fragility analysis is carried out for two different concrete-filled square tubular (CFST) frames,and fragility curves are derived to assess and compare the seismic performances of the two structures.
Steel-concrete composite structures,which possess the advantages of both steel structures and concrete structures,have been quickly developped and widely used. Up to now,it has been a popular structure form for high-rise buildings. Although composite structures have been more and more used in earthquake regions,relevant fragility analysis is not available in the literature. A performance-based fragility analysis method is proposed,with uncertainties due to variability of ground motion characteristics and structures taken into consideration. Four ultimate damage states for entire structure and interstory are defined,and based on which,a method for solving the limit values of the four performance levels is put forward. Seismic fragility analysis is carried out for two different concrete-filled square tubular (CFST) frames,and fragility curves are derived to assess and compare the seismic performances of the two structures.
引文
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[18]李刚,程耿东.基于性能的结构抗震设计———理论、方法与应用[M].北京:科学出版社,2004
[2]王丹.钢框架结构的地震易损性及概率风险分析[D].哈尔滨:哈尔滨工业大学,2006(Wang Dan.Seismic fragility analysis and probabilistic risk analysis of steel frame structures[D].Harbin:Harbin Institute of Technology,2006(in Chinese))
[3]Schotanus M I J,Franchin P,Lupoi A,et al.Seimic fragility analysis of3D structures[J].Structural Safety,2004,26(4):421-441
[4]温增平,高孟潭,赵凤新,等.统一考虑地震环境和局部场地影响的建筑物易损性研究[J].地震学报,2006,28(3):277-283(Wen Zengping,Gao Mengtan,Zhao Fengxin,et al.Seismic vulnerability estimation of the building considering seismic environment and local sitecondition[J].Acta Seismologica Sinica,2006,28(3):277-283(in Chinese))
[5]常泽民.钢筋混凝土结构非线性抗震可靠度及地震易损性分析[D].哈尔滨:哈尔滨工业大学,2006(Chang Zemin.Nonlinear seismic reliability and fragility analysis of RC structures[D].Harbin:Harbin Institute of Technology,2006(in Chinese))
[6]Hwang H,刘晶波.地震作用下钢筋混凝土桥梁结构易损性分析[J].土木工程学报,2004,37(6):47-51(Hwang H,Liu Jingbo.Seismic fragility analysis of reinforced concrete bridges[J].China Civil Engineering Journal,2004,37(6):47-51(in Chinese))
[7]Karim K R,Yamazaki F.Effect of earthquake ground motions on fragility curves of highway bridge piers based on numerical simulation[J].Earthquake Engineering and Structural Dynamics,2001,30(12):1839-1856
[8]Erberik M A,Elnashai A S.Fragility analysis of flat-slab structures[J].Engineering Structures,2004,26(7):937-948
[9]赵雷,陈虬,路湛沁.钢筋砼结构非线性随机地震响应分析[J].工程力学,1999,16(5):21-32(Zhao Lei,Chen Qiu,Lu Zhanqin.Study on nonlinear random seismic response of reinforced concrete structures[J].Engineering Mechanics,1999,16(5):21-32(in Chinese))
[10]高小旺,垄思礼,苏经宇,等.建筑抗震规范设计理解和应用[M].北京:中国建筑工业出版社,2002
[11]FEMA356Prestandard and commentary for the seismicrehabilitation of buildings[S].Washington DC:American Society of Civil Engineers,2000
[12]GB/T24335—2009建(构)筑物地震破坏等级划分[S](GB/T24335—2009Code for classification of earthquake damage to buildings and special structures[S](in Chinese))
[13]Liu Jingbo,Liu Yangbing.Seismic behavior analysis of steel-concrete composite frame structure systems[C]//14th World Conference on Earthquake Engineering.Beijing:2008
[14]韩林海,杨有福.现代钢管混凝土结构技术[M].北京:中国建筑工业出版社,2004
[15]北京金土木软件技术有限公司,中国建筑标准设计研究院.SAP2000中文版使用指南[M].北京:人民交通出版社,2006
[16]Hueste M B D,Bai J W.Seismic retrofit of a reinforced concrete flat-slab structure:PartⅡ-seismic fragility analysis[J].Engineering Structures,2007,29(6):1178-1188
[17]王洁,武清玺.杆系结构蒙特卡罗法计算及敏感性分析[J].山西建筑,2006,32(3):46-47(Wang Jie,Wu Qingxi.Calculation and sensitive analysis for girder structure applying for Monte Carlo method[J].Shanxi Architecture,2006,32(3):46-47(in Chinese))
[18]李刚,程耿东.基于性能的结构抗震设计———理论、方法与应用[M].北京:科学出版社,2004
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