柱增强系数取值对钢筋混凝土抗震框架塑性铰机构的控制效果
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摘要
以我国《混凝土结构设计规范》规定的8 度区二级抗震等级平面框架为例,采用大小不同的柱弯矩增强系数进行框架设计,利用杆系非弹性动力反应分析程序PL-AFJD 对这些框架进行多波输入下的地震反应分析,识别柱弯矩增强系数取值对框架在强震下形成的塑性铰机构的控制效果,并分析达到不同控制效果的主要原因。研究结果对我国结构设计规范优化柱弯矩增强系数取值有一定参考价值。
In the case of the second level aseismic requirement for regions of 8 seismicity, typical frames are designed according to Chinese design code of concrete structures. Varying moment amplification factors are used for floor columns. By means of nonlinear dynamic analytical program PL-AFJD, the responses of these frames under different earthquake excitations are obtained. The effect of the moment amplification factors on controlling plastic hinge mechanism under major earthquakes is studied, and the factors affecting the plastic hinge mechanism are identified. The results are helpful to optimal evaluation of the column moment amplification factors in Chinese concrete structure design code.
In the case of the second level aseismic requirement for regions of 8 seismicity, typical frames are designed according to Chinese design code of concrete structures. Varying moment amplification factors are used for floor columns. By means of nonlinear dynamic analytical program PL-AFJD, the responses of these frames under different earthquake excitations are obtained. The effect of the moment amplification factors on controlling plastic hinge mechanism under major earthquakes is studied, and the factors affecting the plastic hinge mechanism are identified. The results are helpful to optimal evaluation of the column moment amplification factors in Chinese concrete structure design code.
引文
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[6]杨红.基于细化杆模型的钢筋混凝土抗震框架非线性动力反应规律研究[D].重庆:重庆建筑大学,2000.YangHong.Refined-member-based non-linear seismic response ofRC frames[D].Chongqing:ChongqingJianzhuUniversity,2000.(inChinese)
[7]钟益村,任富栋,田家骅.二层双跨钢筋混凝土框架弹塑性性能试验研究[J].建筑结构学报,1981,2(3):34-41.ZhongYicun,RenFudong,TianJiahua.An experimental study of the elastoplastic behavior of two-bay two-storey reinforced concrete frames[J].J. ofBuildingStructures,1981,2(3):34-41.(inChinese)
[8]T Takeda,M A Sozen,N N Nielsen.Reinforced concrete response to simulated earthquakes[J].ASCE,1970,96(ST12):2557-2573.
[9]杨红,王珍,韦锋,白绍良.柱底抗弯能力增强措施对钢筋混凝土框架抗震性能的影响[J].世界地震工程,2002,18(4):66-72.YangHong,WangZhen,WeiFeng,BaiShaoliang.Effect of amplifications at the bottom section of columns on seismic behavior ofRC frames[J].J. ofWorldEarthquakeEngineering,2002,18(4):66-72.(inChinese)
[10]韦锋,杨红,白绍良.对我国不同烈度区钢筋混凝土框架现行抗震规定的初步验证[J].重庆建筑大学学报,2001,23(6):1-9.WeiFeng,YangHong,BaiShao-liang.Calibration of seismic provisions forRC frames in different earthquake-intensity regions inChina[J].J. ofChongqingJianzhuUniversity,2001,23(6):1-9.(inChinese)
[2]NewZealandStandard.NZS 3101:Part1-theDesign ofConcreteStructures,Part2-Commentary on theDesign ofConcreteStructures[S].StandardCouncil,1995.
[3]CEN.EuropeanPrestandardEurocode8: design provisions for earthquake resistance of structures[S].ENV 1998,1-1 to3,Brussels,1994.
[4]ACI Committee318.Building code requirements for structural concrete(ACI318-99) and commentary(ACI318-99 andACI318R-99)[S].AmericanConcreteInstitute,1999.
[5]ComiteEuro-international duBeton(CEB)TaskGroupⅢ/2.Seismic design of reinforced concrete structures for controlled inelastic response(design concepts)[R].London:ThomasTelfordLtd.,1998.
[6]杨红.基于细化杆模型的钢筋混凝土抗震框架非线性动力反应规律研究[D].重庆:重庆建筑大学,2000.YangHong.Refined-member-based non-linear seismic response ofRC frames[D].Chongqing:ChongqingJianzhuUniversity,2000.(inChinese)
[7]钟益村,任富栋,田家骅.二层双跨钢筋混凝土框架弹塑性性能试验研究[J].建筑结构学报,1981,2(3):34-41.ZhongYicun,RenFudong,TianJiahua.An experimental study of the elastoplastic behavior of two-bay two-storey reinforced concrete frames[J].J. ofBuildingStructures,1981,2(3):34-41.(inChinese)
[8]T Takeda,M A Sozen,N N Nielsen.Reinforced concrete response to simulated earthquakes[J].ASCE,1970,96(ST12):2557-2573.
[9]杨红,王珍,韦锋,白绍良.柱底抗弯能力增强措施对钢筋混凝土框架抗震性能的影响[J].世界地震工程,2002,18(4):66-72.YangHong,WangZhen,WeiFeng,BaiShaoliang.Effect of amplifications at the bottom section of columns on seismic behavior ofRC frames[J].J. ofWorldEarthquakeEngineering,2002,18(4):66-72.(inChinese)
[10]韦锋,杨红,白绍良.对我国不同烈度区钢筋混凝土框架现行抗震规定的初步验证[J].重庆建筑大学学报,2001,23(6):1-9.WeiFeng,YangHong,BaiShao-liang.Calibration of seismic provisions forRC frames in different earthquake-intensity regions inChina[J].J. ofChongqingJianzhuUniversity,2001,23(6):1-9.(inChinese)
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