型钢高强高性能混凝土框架柱地震损伤模型研究
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摘要
地震作为一种破坏性极大的突发性自然灾害,瞬间的强烈震动就可能给一个现代化的城市带来毁灭性的冲击。近几年,地震对建筑结构所造成的损伤被各国科学家广泛研究。研究结果表明,损伤将造成结构构件力学性能的不断退化,同时,随着地震往复作用次数的增加,损伤不断积累。当累积损伤达到一定的程度后,将引起结构局部破坏或倒塌。
型钢混凝土结构作为一种抗震性能良好的结构体系,它在地震中的行为为大家所关注。型钢混凝土框架柱作为SRC组合结构中的重要组成构件,首先应了解其损伤机理。本文基于13榀型钢高强高性能混凝土(SRHSHPC)框架柱的低周反复加载试验,得到压、弯、剪共同作用下柱的破坏形态、滞回曲线、骨架曲线,分析了剪跨比、混凝土强度和轴压比对SRHSHPC框架柱抗震性能的影响。在现有地震损伤模型的基础上,进而提出了基于变形和累积耗能非线性组合的地震损伤模型。计算出试验中SRHSHPC框架柱损伤指标随加载水平的变化,同时分析了轴压比、混凝土强度以及剪跨比对框架柱损伤的影响。最后通过地震损伤模型计算值与试验损伤值的对比分析,验证了本文所提出的SRHSHPC框架柱地震损伤模型的可行性。研究结果可为结构损伤分析,经济损失评估以及震后修复提供参考。
The earthquake is a sudden natural disaster;the strong momentary shake can cause destructive effect on our city.In recent years,the damage generated in structures under earthquake is studied extensively by scientists.Due to the effect of damage,the mechanical property of structures and members will be degraded.The research results show that the damage gradually accumulates with the increase of cycle times of earthquake.Local destroy or collapse is generated,when the accumulative damage arrives at a certain extent.
AS a good earthquake-resistance structure system,the seismic performance of Steel Reinforced Concrete(SRC) is studied by scientists.The SRC column is important seismic members for structure,so the damage mechanism of SRC columns should be known clearly.In this paper,failure pattern,hysteretic curves,skeleton curves of Steel Reinforced High Strength and High Performance Concrete(SRHSHPC) frame columns are obtained through experimental results of 13 specimens which are tested under low cyclic repeated loading.The effect of shear span ratio,concrete strength and axial compression ratio on seismic behaviors of SRHSHPC frame columns is analyzed. Based on existing seismic damage models,a new seismic damage model is put forward for SRHSHPC frame columns,which is a nonlinear combination of deformation and accumulative dissipation.The damage index of tentative SRHSHPC frame columns is compared under different loading cycle levels,and the effect of concrete strength,axial compression ratio and shear span ratio on damage of SRHSHPC frame columns is discussed.The comparison of the value of calculation obtained by damage model and the test results shows that the damage model established inhere supplies a good reference for seismic damage analysis of structure,estimation of economic loss and repair after earthquake.
型钢混凝土结构作为一种抗震性能良好的结构体系,它在地震中的行为为大家所关注。型钢混凝土框架柱作为SRC组合结构中的重要组成构件,首先应了解其损伤机理。本文基于13榀型钢高强高性能混凝土(SRHSHPC)框架柱的低周反复加载试验,得到压、弯、剪共同作用下柱的破坏形态、滞回曲线、骨架曲线,分析了剪跨比、混凝土强度和轴压比对SRHSHPC框架柱抗震性能的影响。在现有地震损伤模型的基础上,进而提出了基于变形和累积耗能非线性组合的地震损伤模型。计算出试验中SRHSHPC框架柱损伤指标随加载水平的变化,同时分析了轴压比、混凝土强度以及剪跨比对框架柱损伤的影响。最后通过地震损伤模型计算值与试验损伤值的对比分析,验证了本文所提出的SRHSHPC框架柱地震损伤模型的可行性。研究结果可为结构损伤分析,经济损失评估以及震后修复提供参考。
The earthquake is a sudden natural disaster;the strong momentary shake can cause destructive effect on our city.In recent years,the damage generated in structures under earthquake is studied extensively by scientists.Due to the effect of damage,the mechanical property of structures and members will be degraded.The research results show that the damage gradually accumulates with the increase of cycle times of earthquake.Local destroy or collapse is generated,when the accumulative damage arrives at a certain extent.
AS a good earthquake-resistance structure system,the seismic performance of Steel Reinforced Concrete(SRC) is studied by scientists.The SRC column is important seismic members for structure,so the damage mechanism of SRC columns should be known clearly.In this paper,failure pattern,hysteretic curves,skeleton curves of Steel Reinforced High Strength and High Performance Concrete(SRHSHPC) frame columns are obtained through experimental results of 13 specimens which are tested under low cyclic repeated loading.The effect of shear span ratio,concrete strength and axial compression ratio on seismic behaviors of SRHSHPC frame columns is analyzed. Based on existing seismic damage models,a new seismic damage model is put forward for SRHSHPC frame columns,which is a nonlinear combination of deformation and accumulative dissipation.The damage index of tentative SRHSHPC frame columns is compared under different loading cycle levels,and the effect of concrete strength,axial compression ratio and shear span ratio on damage of SRHSHPC frame columns is discussed.The comparison of the value of calculation obtained by damage model and the test results shows that the damage model established inhere supplies a good reference for seismic damage analysis of structure,estimation of economic loss and repair after earthquake.
引文
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[3]赵鸿铁.钢与混凝土组合结构[M].北京:科学出版社,2001
[4]刘维亚.型钢混凝土结构在我国高层建筑的应用.哈尔滨工业大学学报.2005,37(sup 20):18-21.
[5]叶列平,方鄂华.钢骨混凝土构件的受力性能研究综述[J].土木工程学报.2000,33(5):1-12.
[6]吴德飞,童根树.含初始缺陷钢结构损伤累积至断裂及后期的调查分析.工程力学,2006,23(8):160-167
[7]S.S.Zheng,L.Zeng.Seismic Damage Model for Steel Reinforced High Strength and High Performance Concrete Frame Joints.Fracture and Damage Mechanics,2007,Vols(348-349):837-840
[8]S.S.Zheng,L.Li..Characteristics of Fracture Mechanics for Crack Tip near the Interface between Steel and Concrete in Composite Structures.Key Engineering Materials,2007,Vols (348-349):841-844
[9]S.S.Zheng,S.L.Che..Damage Constitutive Relationship of SRC Member Nonlinear Analysis.Fracture and Damage ~Mechanics,2007,Vols(348-349):833-836
[10]谢里阳.疲劳损伤问题中有效应力的一种定义.应用力学学报,1992,9(1):32-36
[11]董毓利,谢和平,赵鹏.循环受压砼全过程声发射实验及其本构关系.实验力学,1996,11(2):216-221.
[12]董毓利,谢和平,李世平.不同围压下混凝土受压弹塑性损伤本构模型的研究.煤炭学报,1996,21(3):265-270
[13]李杰,吴建营.混凝土弹塑性损伤本构模型研究.土木工程学报,2005,38(9):14-27
[14]李杰,张其云.混凝土随机损伤本构关系.同济大学学报,2001,29(10):1135-1141
[15]Deniaud C,Neale K W..An Assessment of Constitutive Models for Concrete Columns Confined with Fiber Composite Sheets:Composite Structures,2006,73(2):318-330
[16]Luccioni B M,Rougier V.C..A Plastic Damage Approach for Confined Concrete.Computers & Structures,2005,83(27):2238-2256
[17]宋玉普.受侧向约束混凝土的内时损伤本构模型.工程力学,2007,24(12):120-127
[18]S.S.Zheng,L.Li..Study on Interfacial Crack Propagation and Fracture between Embedded Steel and HSHPC.Key Engineering Materials,2007,vols(348-349):853-856
[19]Cipollina A,Lopez-inojosa A.A Simplified Damage Mechanics Approach to Nonlinear Analysis of Frame.Computers & Structures,1995,54(6):1113-1126
[20]Perdomo M E,Rami A..Simulation of Damage in RC Frames with Variable Axial Force.Earthquake Engineering and Structural Dynamics,1999,Vol.29:311-328
[21]Florez-lopez J..Frames Analysis and Continuum Damage Mechanics.European Journal of Mechanics,A/Solid,1998,17(2):269-283
[22]Yong-Ji Park.Mechanics Seismic Damage.Model for Reinforced Concrete.Journal of Structural Engineering,ASCE,1985,111(4):722-739
[23]杜修力,欧进萍.建筑结构地震破坏评估模型.世界地震工程,1991,7(3):52-58
[24]牛荻涛,任利杰.改进的钢筋混凝土双参数地震破坏模型.地震工程与工程振动,1996,16(4):44-54
[25]刘伯权,白绍良.抗震结构的等效延性破坏准则及其子结构试验验证.地震工程与二程振动,1997,17(3):77-83
[26]Krawinkler H,Zohrei M..Cumulative Damage in Steel Structures Subjected to Earthquake Ground Motions.Computers & Structures,1983,16:531-541
[27]Chai Y H..Energy-Based Linear Damage Model for High-Intensity Seismic Loading,Journal of Structural Engineering,ASCE,1995,121(5):857-864
[28]Balkema A A..Challenges for Concrete in the Next Millennium,Volume 2,Rotterdam and Brookfield:851-864
[29]吴波.结构损伤分析的力学方法.地震工程与工程振动,1997,17(1):14-21
[30]Ghobarah A,Abou-elfath H..Response-Based Damage Assessment of Structure.Earthquake Engineering and Structural Dynamics,1999,Voi.28:79-104
[31]曾磊.适用于型钢混凝土结构的高强高性能混凝土试验研究[D].西安建筑科技大学硕士学位论文.2006.
[32]马永欣,郑山锁.结构试验[M].北京:科学出版社,2001.
[33]周明华.土木工程结构试验与检测[M].南京:东南大学出版社,2002.
[34]中国建筑科学研究院.建筑抗震试验方法规程(JGJ 101-96)[s].北京:中国建筑工业出版社,1998.
[35]过镇海,时旭东.钢筋混凝土原理与分析[M].北京:清华大学出版社,2003.12.
[36]王铁成,李新华,王天柱,康谷贻.反复荷载下的异形框架柱滞回性能[J].吉林大学学报.2007.1.
[37]姚谦峰,陈平.土木工程结构试验[M]冲国建筑工业出版社.2007.1.
[38]姚谦峰,苏三庆.地震工程[M].陕西科学技术出版社,2000.12.
[39]李翌新,赵世春.钢筋混凝土及劲性钢筋混凝土构件的累积损伤模型.西南交通大学学报,1994,4;P412-417
[40]Krawinkler H,Zohrei M.Cumulative damage in steel strueture subject to earthquake ground motions.Computer and Structure,1983,16;P531-534.
[41]沈祖炎,董宝,曹文衔.结构损伤积累分析的研究现状和存在的问题,同济大学学报,1997,2;P135-139.
[42]李军旗.钢筋混凝土构件损伤模型.兰州铁道学院学报,2000,3;P13-17.
[43]Kumar Satish,Usami T.Damage cvaluation in steel box columns by cyclic loading tests.ASCE.1995,3;P456-460.
[44]Darmin,Nmai.Energy Dissipation in RC Beams under Cyclic Load.ASCE,1986,8;P89-93.
[45]T.Zahtah,W.Hall,Earthquake Energy Absorption in SDOF Struetures.ASCE,1984,8;P47-53.
[46]Lai.S.P,Biggs JM.Inelastic respones spectra for aseismic building design.ASCE,1980.6;P1295-1310.
[47]KatoB,AkiyamaH.Earthquake resistant design for steel building.Proe6th WCEE.1977,P251-256.
[48]Park.Y.J,Ang.A.H.S..Mechenicistic Seismicdamage model for reinforced concrete..ASCE J of Structural Engineering.1985,111(4):740-757.
[49]Kumar S,Usami T.A note on evaluation of damage in steel structure under cyclic loading.JSCE,J Struc Engg,1994,40:P177-188.
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