钢框架-钢板剪力墙结构弹塑性状态的层剪力分布研究
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摘要
为研究钢框架-钢板剪力墙结构(SPSW)在弹塑性状态下层剪力的分布,该文设计了4个具有理想屈服模式的SPSW结构。考虑了结构层数、近场地震的速度脉冲效应及远场地震加速度累积循环效应的影响,采用弹塑性时程分析方法获得了SPSW结构在两类地震作用下层剪力分布的平均值,提出了SPSW结构弹塑性状态的层剪力分布模式,并同已有的层剪力分布模式进行了对比。分析表明:地震波的近场速度脉冲效应及远场加速度循环效应对SPSW结构的层剪力影响较大,层剪力分布模式应考虑其影响。该文建议的层剪力分布模式在精度上优于其他层剪力分布模式,基于能量的抗震设计方法可采用该文建议的层剪力分布计算结构楼层的耗能。
In order to investigate the horizontal storey shear distribution of a steel plate shear wall under an elastic-plastic state,a total of four SPSW structures with ideal yield mechanism were designed.The effects of story number,velocity pulse near-fault records and acceleration cumulative effect far-fault records were considered.The average story shears of SPSW structures under two kinds of earthquake records were obtained through a nonlinear time history method.The formula of elastic-plastic story shear of SPSW was proposed,and the existing horizontal shear distribution pattern was compared.Near-fault records with velocity pulse and far-fault records with acceleration cumulative effect had important effects on the story shear distribution of SPSW,and this effect factor should be taken into account.The story shear distribution proposed by this paper was more accurate than other story shear distribution patterns.The story hysteric energy of SPSW can be computed reasonably through this new proposed story shear distribution pattern in the energy based aseismic method.
In order to investigate the horizontal storey shear distribution of a steel plate shear wall under an elastic-plastic state,a total of four SPSW structures with ideal yield mechanism were designed.The effects of story number,velocity pulse near-fault records and acceleration cumulative effect far-fault records were considered.The average story shears of SPSW structures under two kinds of earthquake records were obtained through a nonlinear time history method.The formula of elastic-plastic story shear of SPSW was proposed,and the existing horizontal shear distribution pattern was compared.Near-fault records with velocity pulse and far-fault records with acceleration cumulative effect had important effects on the story shear distribution of SPSW,and this effect factor should be taken into account.The story shear distribution proposed by this paper was more accurate than other story shear distribution patterns.The story hysteric energy of SPSW can be computed reasonably through this new proposed story shear distribution pattern in the energy based aseismic method.
引文
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[10]GB50011-2010,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&Building Press,2010.(in Chinese)
[11]SEAOC Blue Book,Recommended lateral forcerequirements and commentary[R].California,US:Seismology Committee Structural Engineers Associationof California,1996:12―13.
[12]FEMA-302,NEHRP recommended provisions forseismic regulations for new buildings and otherstructures(Part 1:Provisions)[R].Washington:FederalEmergency Management Agency,1997:65―66.
[13]Eurocode-8,Design of structures for earthquakeresistance(Part 1:General rules,seismic actions andrules for bulidings)[R].Brussels:European Committeefor Standardization,2003:44―45.
[14]孙国华,顾强,何若全,杨文侠.近断层地震作用下钢板剪力墙结构基于MECE谱的性态设计方法[J].建筑结构学报,2012,33(5):105―117.Sun Guohua,Gu Qiang,He Ruoquan,Yang Wenxia.Performance-based seismic design of steel plate shearwalls using MECE spectrum under near-fault earthquake[J].Journal of Building Structures,2012,33(5):105―117.(in Chinese)
[15]Federal Emergency Management Agency,FEMA695.Quantification of building seismic performance factors[R].California,US:Federal Emergency ManagementAgency,2009:A22―A25.
[2]Decanini L D,Mollaioli F.Formulation of elasticearthquake input energy spectra[J].EarthquakeEngineering and Structural Dynamics,1998,27:1503―1522.
[3]Riddell R,Garcoa J E.Hysteretic energy spectrum anddamage control[J].Earthquake Engineering andStructural Dynamics,2001,30:1791―1816.
[4]Decanini L D,Mollaioli F.An energy-basedmethodology for the assessment of seismic demand[J].Soil Dynamics and Earthquake Engineering,2001,21:113―137.
[5]Ye L P,Otani S.Maximum seismic energy in structures[J].Earthquake Engineering and Structural Dynamics,1999,28:1483―1499.
[6]Teran-Gilmore A,Jirsa J Q.The concept of cumulativeductility strength spectra and its use withinperformance-based seismic design[J].ISET Journal ofEarthquake Technology,2004,41(1):183―200.
[7]Lee Soon-Sik.Performance-based design of steelmoment frames using target drift and yield mechanism[D].Ann Arbor:University of Michigan College ofEngineering,2002:72―100.
[8]Shih-Ho Chao,Goel S C,Soon-Sik Lee.A seismicdesign lateral force distribution based on inelastic state ofstructures[J].Earthquake Spectra,2007,23(3):547―569.
[9]拾宝童,顾强.钢框架-钢板剪力墙用于抗震设计的层间剪力分布[J].苏州科技学院学报(工程技术版),2011,24(1):45―49.Shi Baotong,Gu Qiang.The story shear distribution ofsteel frame-steel plate shear wall for seismic design[J].Journal of Suzhou University of Science and Technology(Engineering and Technology),2011,24(1):45―49.(inChinese)
[10]GB50011-2010,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&Building Press,2010.(in Chinese)
[11]SEAOC Blue Book,Recommended lateral forcerequirements and commentary[R].California,US:Seismology Committee Structural Engineers Associationof California,1996:12―13.
[12]FEMA-302,NEHRP recommended provisions forseismic regulations for new buildings and otherstructures(Part 1:Provisions)[R].Washington:FederalEmergency Management Agency,1997:65―66.
[13]Eurocode-8,Design of structures for earthquakeresistance(Part 1:General rules,seismic actions andrules for bulidings)[R].Brussels:European Committeefor Standardization,2003:44―45.
[14]孙国华,顾强,何若全,杨文侠.近断层地震作用下钢板剪力墙结构基于MECE谱的性态设计方法[J].建筑结构学报,2012,33(5):105―117.Sun Guohua,Gu Qiang,He Ruoquan,Yang Wenxia.Performance-based seismic design of steel plate shearwalls using MECE spectrum under near-fault earthquake[J].Journal of Building Structures,2012,33(5):105―117.(in Chinese)
[15]Federal Emergency Management Agency,FEMA695.Quantification of building seismic performance factors[R].California,US:Federal Emergency ManagementAgency,2009:A22―A25.
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