应变率对钢筋混凝土剪力墙动态性能的影响
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摘要
采用有限元软件ABAQUS中的显示动力分析模块ABAQUS/Explicit,分别对钢筋混凝土剪力墙准静态和高应变率动力荷载作用下的响应进行了数值模拟;通过比较高应变率与准静态加载下的分析结果,探讨了地震作用下应变率对钢筋混凝土剪力墙动态性能的影响。研究结果表明,受应变率效应的影响,混凝土和钢筋的动态力学行为发生了变化,动力荷载作用下的钢筋混凝土剪力墙的承载能力有一定程度的提高,故在对钢筋混凝土结构进行抗震分析时,应适当考虑应变率效应。
The response of the reinforced concrete shear wall under quasi-static load and dynamic load with high strain rate are analyzed using the ABAQUES/Explicit module in finite element software ABAQUES.The results of high strain rate are compared with those of quasi-static to study the effects of strain rate on dynamic behavior of reinforced concrete shear wall.Results show that the dynamic behavior of concrete and steel changes greatly when the strain rate effects are taken into account.For reinforced concrete shear wall subjected to dynamic load,there is an increase in load carrying capacity and stiffness.The strain rate effects should be considered properly in the seismic analysis of reinforced concrete structures.
The response of the reinforced concrete shear wall under quasi-static load and dynamic load with high strain rate are analyzed using the ABAQUES/Explicit module in finite element software ABAQUES.The results of high strain rate are compared with those of quasi-static to study the effects of strain rate on dynamic behavior of reinforced concrete shear wall.Results show that the dynamic behavior of concrete and steel changes greatly when the strain rate effects are taken into account.For reinforced concrete shear wall subjected to dynamic load,there is an increase in load carrying capacity and stiffness.The strain rate effects should be considered properly in the seismic analysis of reinforced concrete structures.
引文
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[13]Malvar L J,Ross C A.Review of strain rate effectsfor concrete in tension[J].ACI Material Journal,1999,96(5):614-616.
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[18]江见鲸,陆新征,叶列平.混凝土结构有限元分析[M].北京:清华大学出版社,2005.Jiang J J,Lu X Z,Ye L P.Finite Element Analysisof Concrete Structures[M].Beijing:Tsinghua Uni-versity Press,2005.
[19]HibbittKarlsson&Sorensen Inc.ABAQUS AnalysisUser′s Manual[M].Rhode Island:Hibbitt Karlsson&Sorensen Inc.2003.
[2]李宏男.结构多维抗震理论[M].北京:科学出版社,2006.Li H N.Theoretical Analysis and Design of Struc-tures to Multiple Earthquake Excitations[M].Bei-jing:Science Press,2006.
[3]Fu H C,Seckin M,Erki M A.Review of effects ofloading rate on reinforced concrete[J].Journal ofStructural Engineering(ASCE),1991,117(12):3660-3670.
[4]方秦,钱七虎.速率相关混凝土模型中一个值得商榷的问题[J].工程力学,1998,15(3):29-35.Fang Q,Qian Q H.Discussion on a rate-dependentconcrete model[J].Engineering Mechanics,1998,15(3):29-35.
[5]吴建营,李杰.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,2006,34(11):1427-1430.Wu J Y,Li J.Elastoplastic damage constitutive mo-del for concrete considering strain rate effect underdynamic loading[J].Journal of Tongji University,2006,34(11):1427-1430.
[6]林峰,Friedhelm S,顾祥林.考虑加载历史的约束混凝土动力本构模型[J].同济大学学报,2008,36(4):432-437.Lin F,Friedhelm S,Gu X L.Dynamic constitutivemodal for confined concrete based on considerationloading history[J].Journal of Tongji University,2008,36(4):432-437.
[7]肖诗云,李宏男,杜荣强,等.应变率对拱坝地震反应的影响[J].土木工程学报,2005,38(8):5-9.Xiao S Y,Li H N,Du R Q,et al.Effects of strainrate on seismic response of arch dams[J].China CivilEngineering Journal,2005,38(8):5-9.
[8]张隆飞.配有高强钢筋的高强混凝土剪力墙抗震性能研究[D].沈阳:沈阳建筑大学,2007.Zhang L F.Seismic behaviors of high strength con-crete shear wall reinforced with high strength rein-forcement[D].Shenyang:Shenyang Jianzhu Univer-sity,2007.
[9]阎石,王丹,张亮,等.爆炸荷载作用下钢筋混凝土柱损伤FEM分析[J].工程力学,2008,25(增刊I).Yan S,Wang D,Zhang L,et al.Damage analysis forRC column under exposive loads[J].Engineering Me-chanics,2008,25(sI)
[10]闫东明.混凝土动态力学试验与理论研究[D].大连:大连理工大学,2006.Yan D M.Experimental and theoretical study on thedynamic properties of concrete[D].Dalian:DalianUniversity of Technology,2006.
[11]李敏,李宏男.建筑钢筋动态试验及本构模型[J].土木工程学报(待刊).Li M,Li H N.Dynamic test and constitutive modelfor reinforcing steel bar[J].China Civil EngineeringJournal(in press).
[12]师燕超,李忠献.爆炸荷载作用下钢筋混凝土柱的动力响应与破坏模式[J].建筑结构学报,2008,29(4):112-117.Shi Y C,Li Z X.Dynamic responses and failuremodes of RC columns under blast loading[J].Journalof Building Structures,2008,29(4):112-117.
[13]Malvar L J,Ross C A.Review of strain rate effectsfor concrete in tension[J].ACI Material Journal,1999,96(5):614-616.
[14]过镇海,时旭东.钢筋混凝土原理和分析[M].北京:清华大学出版社,2003.Guo Z H,Shi X D.Reinforced Concrete Theory andAnalysis[M].Beijing:Tsinghua University Press,2003.
[15]GB 50010-2002,混凝土设计规范[S].
[16]Cela J.Material identification procedure for elasto-plastic drucker-prager model[J].Journal of Engineer-ing Mechanics,2002,128(5):586-591.
[17]Chen W F.Plasticity in Reinforced Concrete[M].New York:McGraw-Hill,1982.
[18]江见鲸,陆新征,叶列平.混凝土结构有限元分析[M].北京:清华大学出版社,2005.Jiang J J,Lu X Z,Ye L P.Finite Element Analysisof Concrete Structures[M].Beijing:Tsinghua Uni-versity Press,2005.
[19]HibbittKarlsson&Sorensen Inc.ABAQUS AnalysisUser′s Manual[M].Rhode Island:Hibbitt Karlsson&Sorensen Inc.2003.
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