型钢高强高性能混凝土框架节点地震损伤模型
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摘要
为了研究地震作用下型钢高强高性能混凝土框架节点的损伤迁移特征和性能退化机理,通过5榀1/4比例框架节点的拟静力试验,对不同轴压比、不同混凝土强度等级的梁柱节点进行了研究。确定了节点损伤变量及涉及的损伤参数,将试验研究结果进行了损伤量化,对试验框架节点的损伤演化过程进行了计算分析,在分析已有地震损伤模型的基础上,提出了适合型钢高强高性能混凝土框架节点的地震损伤模型。结果表明,该模型基于变形和累积耗能非线性组合,与试验现象吻合较好,能反映地震作用下型钢高强高性能混凝土框架节点的受力机理和破坏模式,可对该类节点的抗震设计和地震损伤评估提供理论参考。
Cyclic loading tests are carried out on five 1/4-scale interior joints with different concrete strength grade and column axial load ratio to understand damage characteristics and performance degradation of steel reinforced high strength and high performance concrete(SRHSHPC) frame joints.The damage performances of five tentative frame joints are compared and analyzed according to deformation and dissipated hysteretic energy under different loading levels,and the main influence factors on damage performance are established.A seismic damage model applying to SRHSHPC frame joints is put forward,which takes deformation and cumulative damage into account.The damage model can provide a reference for seismic damage analysis of structure,prediction of earthquake damage in future,estimation of economic loss and repair after earthquake.
Cyclic loading tests are carried out on five 1/4-scale interior joints with different concrete strength grade and column axial load ratio to understand damage characteristics and performance degradation of steel reinforced high strength and high performance concrete(SRHSHPC) frame joints.The damage performances of five tentative frame joints are compared and analyzed according to deformation and dissipated hysteretic energy under different loading levels,and the main influence factors on damage performance are established.A seismic damage model applying to SRHSHPC frame joints is put forward,which takes deformation and cumulative damage into account.The damage model can provide a reference for seismic damage analysis of structure,prediction of earthquake damage in future,estimation of economic loss and repair after earthquake.
引文
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[8]Park Y J,A A H.Mechanistic Seismic Damage Modelfor Reinforced Concrete[J].J.Struc.Engrg.,ASCE,1985,111(4):722～739
[9]Banon H,Veneziano D.Seismic Safety of ReinforcedConcrete Members and Structures[J].EarthquakeEngineering and Structural Dynamics,1982,10:179～193
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[11]Igarashi,Sayaka,Maeda,Masaki.Seismic DamageEvaluation of Ductile R/C Beam and Column:Part 1Development of an Analytical Model for Evaluation ofCrack Length in R/C Member[J].Journal of Structuraland Construction Engineering,2010,86(7～8):581～597
[12]Sreekala R,Lakshmanan N.Development of aSimplified Damage Model for Beams Aiding PerformanceBased Seismic Design[J].Advances in StructuralEngineering,2011,14(2):307～317
[2]Faleiro J,Oller S.Plastic-damage Seismic Model forReinforced Concrete Frames[J].Computers andStructures,2008,86(7～8):581～597
[3]余江滔,陆洲导.震损钢筋混凝土框架节点修复后抗震性能试验研究[J].建筑结构学报,2010,31(12):64～73Yu Jiang-tao,Lu Zhou-dao.Experimental Study onSeismic Behavior of Strengthened RC Column-beamJoints Damaged by Simulated Earthquake[J].Journalof Building Structures,2010,31(12):64～73(inChinese)
[4]Mahin,Bertero V.An Evaluation of Inelastic SeismicDesign Spectra[J].J.Struc.Engrg.,ASCE,1981,107(ST9):1777～1795
[5]Newmark,Rosenblueth.Fundamentals of EarthquakeEngineering[Z].1974
[6]Darwin D,Nmai C K.Energy Dissipation in RC Beamsunder Cyclic Load[J].J.Struc.Engrg.,ASCE,1986,112(8):1826～1846
[7]Hwang T H,Scribner C F.RC Member CyclicResponse During Various Loading[J].J.Struc.Engrg.,ASCE,1984,110(3):477～489
[8]Park Y J,A A H.Mechanistic Seismic Damage Modelfor Reinforced Concrete[J].J.Struc.Engrg.,ASCE,1985,111(4):722～739
[9]Banon H,Veneziano D.Seismic Safety of ReinforcedConcrete Members and Structures[J].EarthquakeEngineering and Structural Dynamics,1982,10:179～193
[10]Reihorn A M,Kunnath S K,Mander J B.SeismicDesign of Structures for Damage Control,NonlinearSeismic Analysis and Design of Reinforced ConcreteBuildings[M].Elsevier Applied Science,1992:63～76
[11]Igarashi,Sayaka,Maeda,Masaki.Seismic DamageEvaluation of Ductile R/C Beam and Column:Part 1Development of an Analytical Model for Evaluation ofCrack Length in R/C Member[J].Journal of Structuraland Construction Engineering,2010,86(7～8):581～597
[12]Sreekala R,Lakshmanan N.Development of aSimplified Damage Model for Beams Aiding PerformanceBased Seismic Design[J].Advances in StructuralEngineering,2011,14(2):307～317
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