剪力墙非线性宏观单元的研究与单元开发
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摘要
罕遇地震作用下剪力墙构件易进入塑性阶段而发生弹塑性损伤,准确地模拟剪力墙构件进入非线性状态后的力学行为对评价剪力墙结构的抗震安全性及基于性能的抗震设计具有重要的意义。通过面向对象语言编制了基于宏观单元的结构弹塑性分析软件平台MESAP及多竖向弹簧剪力墙单元(MVLEM),采用材料本构及Fischinger学者提出的轴向弹簧本构对按我国规范设计的剪力墙低周往复荷载试验进行分析,其滞回曲线吻合程度较高,表明该单元能够反映剪力墙构件的强非线性行为,且精度较高。
Since the elastoplastic damage occurs in the plastic stage of shear walls under a severe earthquake,the accurate modeling of the inelastic response of shear walls is primary to assess the aseismic safety and performance-based aseismic design.A structural elastoplastic analysis program MEASP which bases on macro elements is developed with object oriented language and the multiple-vertical-line-element model(MVLEM) is implemented in MESAP.The nonlinear macro element MVLEM is adopted to simulate the nonlinear behavior of shear walls designed according to Chinese code under a cyclic reverse loading test,and according to incorporating material constitutive relations as well as the uniaxial spring constitutive relation proposed by Fischinge.The hysteretic curve agrees well with the test,which indicates that the MVLEM is suitable to simulate the strong nonlinear behavior of shear walls accurately.
Since the elastoplastic damage occurs in the plastic stage of shear walls under a severe earthquake,the accurate modeling of the inelastic response of shear walls is primary to assess the aseismic safety and performance-based aseismic design.A structural elastoplastic analysis program MEASP which bases on macro elements is developed with object oriented language and the multiple-vertical-line-element model(MVLEM) is implemented in MESAP.The nonlinear macro element MVLEM is adopted to simulate the nonlinear behavior of shear walls designed according to Chinese code under a cyclic reverse loading test,and according to incorporating material constitutive relations as well as the uniaxial spring constitutive relation proposed by Fischinge.The hysteretic curve agrees well with the test,which indicates that the MVLEM is suitable to simulate the strong nonlinear behavior of shear walls accurately.
引文
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[2]Vulcano A,Bertero V V.Analytical models for predicting the lateral response of RC shear walls:evaluation of their reliability[R].Berkeley,California:EERC Report No.UCB/EERC-87/19,Earthquake Engineering Research Center,University of California,1987.
[3]Kutay Orakcal,Lenonardo M Massone,John W Wallance.Analytical modeling of reinforced concrete walls for predicting flexural and coupled-shear-flexural responses[R].California,USA:PEER,Berkeley,University of California,2006.
[4]Kent D C,Park R.Flexural members with confined-concrete[R].California:ASCE,1971,97:1969―1990.
[5]Karsan I D,Jirsa J O.Behavior of concrete under compressive loadings[J].ASCE Journal of the Structural Division,1971,97(7):1969―1990.
[6]Menegotto M,Pinto P E.Method of analysis of cyclically loaded RC plane frames including changes in geometry and non-elastic behavior of elements under normal force and bending[R].California,USA:Preliminary Report,IABSE,1973,13:15―22.
[7]Kabeyasawa T,Shiohara H,Otani S.Analysis of the full-scale seven-story reinforced concrete test structure[J].Journal of the Faculty of Engineering,1997,37(2):431―478.
[8]Fischinger M,Isakovic T,Kante P.Implementation of a macro model to predict seismic response of RC structure walls[J].Computers and Concrete,2004,1(2):55―73.
[9]韩小雷,陈学伟,戴金华.基于OpenSEES的剪力墙低周往复试验的数值分析[J].华南理工大学学报(自然科学版),2008,36(12):7―12.Han Xiaolei,Chen Xuewei,Dai Jinhua.Numerical analysis for low-cyclic loading test of shear walls based on OpenSEES[J].Journal of South China University of Technology(Natural Science Edition),2008,36(12):7―12.(in Chinese)
[10]韩小雷,陈学伟,林生逸.基于纤维模型的超高层钢筋混凝土结构弹塑性时程分析[J].建筑结构,2010,40(2):13―16.Han Xiaolei,Chen Xuewei,Lin Shengyi.Elasto-plastic time-history analysis of super high-rise RC structure based on fiber model[J].Building Structure,2010,40(2):13―16.(in Chinese)
[11]Wallace John W.Modelling issues for tall reinforced concrete core wall buildings[J].The Structural Design of Tall and Special Buildings,2007,16:615―632.
[12]韩小雷,季静,何伟球.广州花园酒店西塔“白金五星级酒店”改造结构抗震试验研究报告[R].广州:华南理工大学建筑学院,2006.Han Xiaolei,Ji Jing,He Weiqiu.The seismic experiment research report of Guangzhou Garden Hotel west tower structure[R].Guangzhou:South China University of Technology,Architecture Collage,2006.(in Chinese)
[13]韩小雷,陈学伟,吴培烽.OpenSEES的剪力墙宏观单元的研究[J].世界地震工程,2008,24(4):76―81.Han Xiaolei,Chen Xuewei,Wu Peifeng.Research on the shear wall macro-element of OpenSEES[J].World Earthquake Engineering,2008,24(4):76―81.(in Chinese)
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