基于耗能历程等效的RC框架地震损伤评价
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摘要
基于结构能量输入历程的简化描述,建立结构变形能耗散历程的简化模型。该简化模型以最大瞬时变形能、总滞回耗能和能量增长持时作为控制参数。根据该简化模型能够获得结构变形能增量历程,从而实现基于变形能增量历程的结构往复推覆分析。该往复推覆分析方法能够较为准确的估计钢筋混凝土框架结构在地震作用下的出铰模式、最大层间位移、累积滞回耗能及滞回耗能的分布。通过对无损结构与已损结构(往复推覆后的结构)分别进行单向推覆分析,根据单向推覆过程中塑性铰滞回耗能能力的变化与结构层耗储变形能能力的变化来获得对结构局部损伤与整体损伤的描述。
By established the relationship between the time varying characteristic of momentary input energy and strain energy dissipation history of linear single degree of freedom system,a simplified procedure to simulate strain energy dissipation history is proposed.Based on the strain energy dissipation history,a modified cyclic pushover method which can simulate the maximum deformation,total hysteretic energy and characteristics of energy dissipation history is elaborated to evaluate the seismic damage index of reinforced concrete frames.The damage index keeps clear rules for combining local damage indices into global damage indices.
By established the relationship between the time varying characteristic of momentary input energy and strain energy dissipation history of linear single degree of freedom system,a simplified procedure to simulate strain energy dissipation history is proposed.Based on the strain energy dissipation history,a modified cyclic pushover method which can simulate the maximum deformation,total hysteretic energy and characteristics of energy dissipation history is elaborated to evaluate the seismic damage index of reinforced concrete frames.The damage index keeps clear rules for combining local damage indices into global damage indices.
引文
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[8]陈逵,刘哲锋,沈蒲生.基于瞬时输入能量时变特征的SDOF体系位移历程模拟[J].工程力学,2011,28(9):66-71(Chen Kui,Liu Zhefeng,Shen Pusheng.Thesimulated deformation response of SDOF system based ontime varying characteristic of momentary input energy[J].Engineering Mechanics,2011,28(9):66-71(inChinese))
[9]陈逵,刘哲锋,沈蒲生.延性系数对SDOF体系地震能量输入历程的影响研究[J].地震工程与工程振动,2010,30(6):56-63(Chen Kui,Liu Zhefeng,ShenPusheng.Study on the effect of ductility coefficient oninput energy time histories for inelastic SDOF systems[J].Earthquake Engineering and Engineering Vibration,2010,30(6):56-63(in Chinese))
[10]胡冗冗.地震动瞬时能量与结构最大位移反应关系研究[D].武汉:华中科技大学,2000(Hu Rongrong.Astudy on relation of instantaneous energy of earthquakestrong motion and maximum displacement response ofstructures[D].Wuhan:Huazhong University of ScienceAnd Technology,2000(in Chinese))
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[12]张新培.钢筋混凝土抗震结构非线性分析[M].北京:科学出版社,2003:65-68
[13]杜宏彪,沈聚敏.空间钢筋混凝土框架结构模型的振动台试验研究[J].建筑结构学报,1995,16(1):60-69(Du Hongbiao,Shen Jumin.Shaking table tests of RCspace frames[J].Journal of Building Structures,1995,16(1):60-69(in Chinese))
[2]汪梦甫,周锡元.高层建筑结构抗震弹塑性分析方法及抗震性能评估的研究[J].土木工程学报,2003,36(11):44-49(Wang Mengfu,Zhou Xiyuan.Modifiedpushover analysis and seismic performance evaluation fortall building[J].China Civil Engineering Journal,2003,36(11):44-49(in Chinese))
[3]于琦,孟少平,吴京.基于变形与能量双重准则的钢筋混凝土结构地震损伤评估[J].土木工程学报,2011,44(5):16-23(Yu Qi,Meng Shaoping,Wu Jing.Deformation and energy-based seismic damage evaluation ofreinforced concrete structures[J].China Civil EngineeringJournal,2011,44(5):16-23(in Chinese))
[4]Erberik A,Sucuoglu H.Seismic energy dissipation indeteriorating systems through low-cycle fatigue[J].Earthquake Engineering and Structural Dynamics,2004,33(1):49-67
[5]Jiao Y,Yamada S,Kishiki S,et al.Evaluation of plasticenergy dissipation capacity of steel beams suffering ductilefracture under various loading histories[J].EarthquakeEngineering and Structural Dynamics,2011,40(14):1553-1570
[6]Park Y J,Ang A H S.Mechanistic seismic damage modelfor reinforced concrete[J].Journal of StructuralEngineering,ASCE,1985,111(4):722-739
[7]Hori N,Inoue N.Damaging properties of ground motionsand prediction of maximum response of structures based onmomentary energy response[J].Earthquake Engineeringand Structural Dynamics,2002,31(9):1657-1679
[8]陈逵,刘哲锋,沈蒲生.基于瞬时输入能量时变特征的SDOF体系位移历程模拟[J].工程力学,2011,28(9):66-71(Chen Kui,Liu Zhefeng,Shen Pusheng.Thesimulated deformation response of SDOF system based ontime varying characteristic of momentary input energy[J].Engineering Mechanics,2011,28(9):66-71(inChinese))
[9]陈逵,刘哲锋,沈蒲生.延性系数对SDOF体系地震能量输入历程的影响研究[J].地震工程与工程振动,2010,30(6):56-63(Chen Kui,Liu Zhefeng,ShenPusheng.Study on the effect of ductility coefficient oninput energy time histories for inelastic SDOF systems[J].Earthquake Engineering and Engineering Vibration,2010,30(6):56-63(in Chinese))
[10]胡冗冗.地震动瞬时能量与结构最大位移反应关系研究[D].武汉:华中科技大学,2000(Hu Rongrong.Astudy on relation of instantaneous energy of earthquakestrong motion and maximum displacement response ofstructures[D].Wuhan:Huazhong University of ScienceAnd Technology,2000(in Chinese))
[11]Fajfar P,Vidic T.Consistent inelastic design spectra:Hysteretic and input energy[J].Earthquake Engineering&Structural Dynamics,1994,23(5):523-537
[12]张新培.钢筋混凝土抗震结构非线性分析[M].北京:科学出版社,2003:65-68
[13]杜宏彪,沈聚敏.空间钢筋混凝土框架结构模型的振动台试验研究[J].建筑结构学报,1995,16(1):60-69(Du Hongbiao,Shen Jumin.Shaking table tests of RCspace frames[J].Journal of Building Structures,1995,16(1):60-69(in Chinese))
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