基于损伤理论的混凝土结构震害评估方法
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摘要
损伤评估方法是结构地震灾害分析的关键,也是确定结构抗震性能目标的基本依据。从混凝土结构地震灾变的微观机理入手,采用损伤本构理论描述材料性能的劣化,考虑构件及结构宏观刚度下降和承载力减小。为弥补现有评估模型的不足,作者根据当前损伤累积耗能和非线性耗能能力的比值,推导一种新的损伤评估指标模型,基于大型商业的二次开发功能实现了模型的数值计算过程。将上述理论模型用于实际混凝土结构振动台试验过程的地震损伤评估,模拟结果说明损伤评估模型和算法的合理性。
Seismic damage assessment method is the key of structural disaster analysis and the base on which the property objects are established.In this essay,the micro mechanism is investigated by damage constitutive theory to include degradation of material properties with macro stiffness and capacity decrease of components and structural system being considered.To overcome the limitations of the existing damage assessment approaches,the authors contribute a kind of novel assessment method based on damage theory which is calculated by the ratio of current accumulated damage energy and the total nonlinear energy ability.The numerical course is implemented through the re-develop function of large commercial software and made use of to simulate a concrete structure experiment executed on a shaking table.The calculation result verifies the reasonability of our model and numerical method.
Seismic damage assessment method is the key of structural disaster analysis and the base on which the property objects are established.In this essay,the micro mechanism is investigated by damage constitutive theory to include degradation of material properties with macro stiffness and capacity decrease of components and structural system being considered.To overcome the limitations of the existing damage assessment approaches,the authors contribute a kind of novel assessment method based on damage theory which is calculated by the ratio of current accumulated damage energy and the total nonlinear energy ability.The numerical course is implemented through the re-develop function of large commercial software and made use of to simulate a concrete structure experiment executed on a shaking table.The calculation result verifies the reasonability of our model and numerical method.
引文
[1]Kowalsky M J.A displacement-based approach for theseismic design of continuous concrete bridges[J].Earthquake Engineering and Structural Dynamics,2002,31:719-747
[2]Park Y J,Ang H S.Mechanistic seismic damage model forreinforced conerete[J].Jounal of Structure Engineering,1985,111(4):722-739
[3]丁建,白国良,蒋建,等.钢筋混凝土框架结构直接基于损伤性能的抗震设计方法研究[J].世界地震工程,2007,23(4):199-207(Ding Jian,Bai Guoliang,JiangJian,et al.Research on seismic capacity design method ofRC frame based on direct damage[J].World EarthquakeEngineering,2007,23(4):199-207(in Chinese))
[4]王丰,李宏男,伊廷华.钢筋混凝土结构直接基于损伤性能目标的抗震设计方法[J].振动与冲击,2009,28(2):128-131,144,206(Wang Feng,Li Hongnan,YiTinghua.Direct damage-based seismic design methodologyfor RC buildings[J].Journal of Vibration and Shock,2009,28(2):128-131,144,206(in Chinese))
[5]涂胡兵,滕军,胡艳容.剪切型结构基于损伤的抗震设计方法研究[J].西安建筑科技大学学报:自然科学版,2010,42(2):180-185(Tu Hubing,Teng Jun,HuYanrong.Study on the seismic design method of shearstructures based on damage[J].Journal of Xi’anUniversity of Architecture&Technology:Natural ScienceEdition,2010,42(2):180-185(in Chinese))
[6]邵长江.混凝土损伤本构理论及其在大跨梁桥地震响应分析中的应用研究[D].成都:西南交通大学,2007(Shao Changjiang.Research on damage constitutive theoryof concrete and its application in seismic analysis of long-span bridge[D].Chengdu:Southwest Jiaotong University,2007(in Chinese))
[7]Shao Changjiang,Li Jianzhong,Wu Yonghong,et al.Pseudo-potential of elastoplastic damage constitutive modeland its application[J].International Journal of Solids andStructures,2009,46:3894-3901
[8]Oller S,Barbat A H.Moment-curvature damage model forbridges subjected to seismic loads[J].Comput.MethodsAppl Mech.Engrg.,2006,195:4490-4511
[9]Faleiro J,Oller S,Barbat A H,Plastic-damage seismicmodel for reinforced concrete frames[J].Computers andStructures,2008,86:581-597
[10]邵长江.基于损伤本构理论的混凝土梁桥地震灾变机理研究[R].上海:同济大学,2009(Shao Changjiang.Seismic catastrophic mechanism analysis of concrete bridgesbased upon damage constitutive theory[D].Shanghai:Tongji University,2010(in Chinese))
[11]邵长江,钱永久.混凝土的一种标量弹塑性损伤本构模型[J].计算力学学报,2010,27(2):298-302(ShaoChangjiang,Qian Yongjiu.A kind of scalar damageelastoplastic constitutive model of concrete[J].ChineseJournal of Computational Mechanics,2010,27(2):298-302(in Chinese))
[12]邵长江,李建中.塑性损伤本构模型的自由能势函数研究[J].固体力学学报,2010,31(3):237-243(ShaoChangjiang,Li Jianzhong.Research on free energypotential of plastic damage constitutive models[J].ActaMechanica Solida Sinica,2010,31(3):237-243(inChinese))
[13]Hordijk D A.Local approach to fatigue of concrete[D].Delft:Technique of Delft University,1991
[14]Elwood K J,Moehle J P.Dynamic collapse analysis for areinforced concrete frame sustaining shear and axial failures[R].Earthquake Engineering&Structural Dynamics,2008,37(7):991-1012
[2]Park Y J,Ang H S.Mechanistic seismic damage model forreinforced conerete[J].Jounal of Structure Engineering,1985,111(4):722-739
[3]丁建,白国良,蒋建,等.钢筋混凝土框架结构直接基于损伤性能的抗震设计方法研究[J].世界地震工程,2007,23(4):199-207(Ding Jian,Bai Guoliang,JiangJian,et al.Research on seismic capacity design method ofRC frame based on direct damage[J].World EarthquakeEngineering,2007,23(4):199-207(in Chinese))
[4]王丰,李宏男,伊廷华.钢筋混凝土结构直接基于损伤性能目标的抗震设计方法[J].振动与冲击,2009,28(2):128-131,144,206(Wang Feng,Li Hongnan,YiTinghua.Direct damage-based seismic design methodologyfor RC buildings[J].Journal of Vibration and Shock,2009,28(2):128-131,144,206(in Chinese))
[5]涂胡兵,滕军,胡艳容.剪切型结构基于损伤的抗震设计方法研究[J].西安建筑科技大学学报:自然科学版,2010,42(2):180-185(Tu Hubing,Teng Jun,HuYanrong.Study on the seismic design method of shearstructures based on damage[J].Journal of Xi’anUniversity of Architecture&Technology:Natural ScienceEdition,2010,42(2):180-185(in Chinese))
[6]邵长江.混凝土损伤本构理论及其在大跨梁桥地震响应分析中的应用研究[D].成都:西南交通大学,2007(Shao Changjiang.Research on damage constitutive theoryof concrete and its application in seismic analysis of long-span bridge[D].Chengdu:Southwest Jiaotong University,2007(in Chinese))
[7]Shao Changjiang,Li Jianzhong,Wu Yonghong,et al.Pseudo-potential of elastoplastic damage constitutive modeland its application[J].International Journal of Solids andStructures,2009,46:3894-3901
[8]Oller S,Barbat A H.Moment-curvature damage model forbridges subjected to seismic loads[J].Comput.MethodsAppl Mech.Engrg.,2006,195:4490-4511
[9]Faleiro J,Oller S,Barbat A H,Plastic-damage seismicmodel for reinforced concrete frames[J].Computers andStructures,2008,86:581-597
[10]邵长江.基于损伤本构理论的混凝土梁桥地震灾变机理研究[R].上海:同济大学,2009(Shao Changjiang.Seismic catastrophic mechanism analysis of concrete bridgesbased upon damage constitutive theory[D].Shanghai:Tongji University,2010(in Chinese))
[11]邵长江,钱永久.混凝土的一种标量弹塑性损伤本构模型[J].计算力学学报,2010,27(2):298-302(ShaoChangjiang,Qian Yongjiu.A kind of scalar damageelastoplastic constitutive model of concrete[J].ChineseJournal of Computational Mechanics,2010,27(2):298-302(in Chinese))
[12]邵长江,李建中.塑性损伤本构模型的自由能势函数研究[J].固体力学学报,2010,31(3):237-243(ShaoChangjiang,Li Jianzhong.Research on free energypotential of plastic damage constitutive models[J].ActaMechanica Solida Sinica,2010,31(3):237-243(inChinese))
[13]Hordijk D A.Local approach to fatigue of concrete[D].Delft:Technique of Delft University,1991
[14]Elwood K J,Moehle J P.Dynamic collapse analysis for areinforced concrete frame sustaining shear and axial failures[R].Earthquake Engineering&Structural Dynamics,2008,37(7):991-1012
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