一种简化的混凝土结构地震损伤评估模型及方法
|
摘要
随着地震工程学的发展和结构抗震设计思想和理论的进步,探讨结构在地震作用下的地震损伤破坏机理和基于结构性能的抗震设计方法(PBSD)逐渐得到了各国专家、学者的重视。而地震损伤评估的研究就是其中的一个重要方向。鉴于现阶段混凝土结构地震损伤评估方法的局限性,本文采用推广的混凝土材料的Mazars损伤模型,进而提出了一种基于常规有限元分析荷载子步的简化的地震损伤评估方法,这种方法实现简单,便于实际工程应用,同时具有一定的精细性。最后,将本文的损伤评估方法应用到一个钢筋混凝土框架的地震损伤评估实例中,分析结果与实验和实际的震害比较吻合,表明本文提出的模型和方法是有效的。
With the development of earthquake engineering and the progress of theory on anti-seismic design,the failure mechanism of structures and the complete process analysis under earthquakes become increasingly important.The performance based seismic design method(PBSD) is also paid attention to by many experts.Currently,the structural seismic evaluation is one of the important research directions in PBSD.In view of the limitation of reinforced concrete structural seismic assessment with recent methods,a simplified seismic assessment method is proposed which is based on the ordinary FEA substep and uniaxial Mazars damage model for concrete.This method has some good traits including definite physical meaning,easy implementation and convenient application.In addition,it has a relatively satisfying precision.Finally,our method was applied to a seismic assessment of a reinforced concrete frame,and the results are in good agreement with the observation in experiments.
With the development of earthquake engineering and the progress of theory on anti-seismic design,the failure mechanism of structures and the complete process analysis under earthquakes become increasingly important.The performance based seismic design method(PBSD) is also paid attention to by many experts.Currently,the structural seismic evaluation is one of the important research directions in PBSD.In view of the limitation of reinforced concrete structural seismic assessment with recent methods,a simplified seismic assessment method is proposed which is based on the ordinary FEA substep and uniaxial Mazars damage model for concrete.This method has some good traits including definite physical meaning,easy implementation and convenient application.In addition,it has a relatively satisfying precision.Finally,our method was applied to a seismic assessment of a reinforced concrete frame,and the results are in good agreement with the observation in experiments.
引文
李庆斌,1995.混凝土静、动力双剪损伤本构理论.水利学报,(2):27—34.
李敏,赵军,2004.基于Ottosen本构关系的混凝土三维损伤模型.力学季刊,25(3):392—397.
欧进萍,何政,吴斌等,1999.钢筋混凝土结构基于地震损伤性能的设计.地震工程与工程振动,19(1):21—30.
潘龙,孙利民,范立础,2001.基于推倒分析的桥梁地震损伤评估模型与方法.同济大学学报,29(1):10—14.
王振宇,刘晶波,2001.建筑结构地震损伤评估的研究进展.世界地震工程,17(3):43—48.
叶献国,1998.基于非线性分析的钢筋混凝土结构地震反应与破损的数值模拟.土木工程学报,31(4):3—13.
Cicekli U.,Voyiadjis G.Z.,Al-Rub R.K.A.,2007.A plastic and anisotropic damage model for plain concrete.International Journal of Plasticity,23(10):1874—1900.
Ghobarah A.,Abou-Elfath H.,Biddah A.,1999.Response-based damage assessment of structures.Earthquake Engng Struct Dyn.,28(1):79—104.
Jason L.,Huerta A.,Pijaudier-Cabot G.,Ghavamian S.,2006.An elastic plastic damage formulation for concrete:application to elementary tests and comparison with an isotropic damage model.Comput.Methods Appl.Mech.Engrg.,195(52):7077—7092.
Lee J.,Fenves G.L.,1998.Plastic-damage model for cyclic loading of concrete structures.Journal of Engineering Mechanics,ASCE,124(8):892—900.
Lemaitre J.,1992.A Course on Damage Mechanics.Berlin:Springer-Verlag.
Lubliner J.,Oliver J.,Oller S.,Onate E.,1989.A plastic-damage model for concrete.Int.J.Solids Stuctures,25(3):299—326.
Mazars J.,Pijaudier-Cabot G.,1989.Continuum damage theory-application to concrete.Journal of Engineering Mechanics,ASCE,115(2):345—365.
Park Y.J.,Ang A.H.S.,1985.A mechanistic seismic damage model for reinforced concrete.Journal of structure engineering,ASCE,111(4):722—739.
李敏,赵军,2004.基于Ottosen本构关系的混凝土三维损伤模型.力学季刊,25(3):392—397.
欧进萍,何政,吴斌等,1999.钢筋混凝土结构基于地震损伤性能的设计.地震工程与工程振动,19(1):21—30.
潘龙,孙利民,范立础,2001.基于推倒分析的桥梁地震损伤评估模型与方法.同济大学学报,29(1):10—14.
王振宇,刘晶波,2001.建筑结构地震损伤评估的研究进展.世界地震工程,17(3):43—48.
叶献国,1998.基于非线性分析的钢筋混凝土结构地震反应与破损的数值模拟.土木工程学报,31(4):3—13.
Cicekli U.,Voyiadjis G.Z.,Al-Rub R.K.A.,2007.A plastic and anisotropic damage model for plain concrete.International Journal of Plasticity,23(10):1874—1900.
Ghobarah A.,Abou-Elfath H.,Biddah A.,1999.Response-based damage assessment of structures.Earthquake Engng Struct Dyn.,28(1):79—104.
Jason L.,Huerta A.,Pijaudier-Cabot G.,Ghavamian S.,2006.An elastic plastic damage formulation for concrete:application to elementary tests and comparison with an isotropic damage model.Comput.Methods Appl.Mech.Engrg.,195(52):7077—7092.
Lee J.,Fenves G.L.,1998.Plastic-damage model for cyclic loading of concrete structures.Journal of Engineering Mechanics,ASCE,124(8):892—900.
Lemaitre J.,1992.A Course on Damage Mechanics.Berlin:Springer-Verlag.
Lubliner J.,Oliver J.,Oller S.,Onate E.,1989.A plastic-damage model for concrete.Int.J.Solids Stuctures,25(3):299—326.
Mazars J.,Pijaudier-Cabot G.,1989.Continuum damage theory-application to concrete.Journal of Engineering Mechanics,ASCE,115(2):345—365.
Park Y.J.,Ang A.H.S.,1985.A mechanistic seismic damage model for reinforced concrete.Journal of structure engineering,ASCE,111(4):722—739.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心