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混凝土率相关单轴塑性损伤本构的开发及应用

Keywords: 混凝土,塑性损伤本构,应变率,爆炸作用,LS-DYNA

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Abstract:

为了对爆炸作用下钢筋混凝土(reinforcedconcrete,RC)构件动力响应进行简化分析,需要合理描述混凝土和钢筋的应变率效应,而LS-DYNA中缺乏能够考虑混凝土应变率效应的单轴本构模型,因此,结合Faria单轴塑性损伤模型,通过黏性规则化方法调整率无关模型的损伤阈值演化律以考虑应变率效应,并利用LS-DYNA将该模型编制为用户材料子程序VUMAT.以单个单元测试了高应变率下材料的基本性能;基于纤维模型模拟了RC梁在爆炸、冲击作用下的动力响应.结果表明:该本构模型能反映混凝土受拉应变率效应高于受压应变率效应的事实,同时也能较准确地模拟爆炸与冲击作用下RC梁的动力响应.

References

[1]  ROSS C A,TEDESCO J W,KUENNEN S T.Effects of strain rate on concrete strength[J].ACI Materials Journal,1995,92(1):37-45.
[2]  COTSOVOS D M,PAVLOVIC M N.Numerical investigation of concrete subjected to compressive impact loading:part 1 a fundamental explanation for the apparent strength gain at high loading rates[J].Computers&Structures,2008,86(1):145-163.
[3]  COTSOVOS D M,PAVLOVIC M N.Numerical investigation of concrete subjected to compressive impact loading:part 2 parametric investigation of factors affecting behaviour at high loading rates[J].Computers&Structures,2008,86(1):164-180.
[4]  HAO Yi-fei,HAO Hong,LI Zhong-xian.Numerical analysis of lateral inertial confinement effects on impact test of concrete compressive material properties[J].International Journal of Protective Structures,2010,1(1):145-168.
[5]  XU H,WEN H M.Semi-empirical equations for the dynamic strength enhancement of concrete-like materials[J].International Journal of Impact Engineering,2013,60:76-81.
[6]  FARIA R,OLIVER J,CERVERA M.A strain-based plastic viscous-damage model for massive concrete structures[J].International Journal of Solids and Structures,1998,35(14):1533-1558.
[7]  CERVERA M,OLIVER J,MANZOLI O.A ratedependent isotropic damage model for the seismic analysis of concrete dams[J].Earthquake Engineering&Structural Dynamics,1996,25(9):987-1010.
[8]  WU J Y,LI J,FARIA R.An energy release rate-based plastic-damage model for concrete[J].International Journal of Solids and Structures,2006,43(3):583-612.
[9]  李杰,吴建营.考虑应变率效应的混凝土动力弹塑性损伤本构模型[J].同济大学学报:自然科学版,2006,34(11):1427-1430.LI Jie,WU Jian-ying.Elastoplastic damage constitutive model for concrete considering strain rate effect under dynamic loading[J].Journal of Tongji Univeristy:Natural Science,2006,34(11):1427-1430.(in Chinese)
[10]  李正.复杂受力条件下混凝土损伤本构模型及钢筋混凝土桥梁地震损伤分析[D].天津:天津大学建筑工程学院,2011.LI Zheng.Damage constitutive model of concrete under complex loading and seismic damage analysis of reinforced concrete bridges[D].Tianjin:School of Civil Engineering,Tianjin University,2011.(in Chinese)
[11]  SEABOLD R H.Dynamic shear strength of reinforced concrete beams:part 3[R].Port Hueneme:Naval Civil Engineering Lab,1970.
[12]  FELDMAN A,KEENAN W A,SIESS C P.Investigation of resistance and behavior of reinforced concrete members subjected to dynamic loading:partⅢ[R].Chanpaign:Urbana Engineering Experiment Station,Illinois University,1962.
[13]  HALLQUIST J O.LS-DYNA keyword user’s manual[M].California:Livermore Software Technology Corporation,2007.
[14]  BISCHOFF P H,PERRY S H.Compressive behaviour of concrete at high strain rates[J].Materials and Structures,1991,24(6):425-450.
[15]  MALVAR L J,ROSS C A.Review of strain rate effects for concrete in tension[J].ACI Materials Journal,1998,95(6):735-739.
[16]  CEB-FIP M C.CEB-FIP model code 1990 design of concrete structures[S].London:British Standard Institution,1993.

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