双向往复加载下钢筋混凝土柱破坏过程的数值模拟
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摘要
目的为准确地模拟双向往复加载下钢筋混凝土柱构件的非线性及断裂破坏行为,实现钢筋混凝土框架结构强震作用下的倒塌破坏全过程仿真分析.方法基于通用有限元软件ABAQUS的显式求解模块,研究了钢筋混凝土梁柱构件纤维梁单元的构型及单元消除技术,构建了包含材料破坏准则的钢筋、混凝土单轴本构关系,利用用户材料接口VUMAT编制了相应的计算子程序,并模拟了钢筋混凝土柱构件在单、双向水平往复荷载作用下的非线性性能发展以及断裂破坏过程.结果在加载幅值较小时,计算结果能够准确模拟双向往复加载下钢筋混凝土柱的承载力与刚度变化、滞回捏拢行为以及双向弯曲耦合效应.在水平位移加载幅值分别达到45 mm、90 mm、165 mm时,构件中的保护层混凝土、核心混凝土、钢筋完全破坏,构件断裂.而单向加载构件的水平位移加载幅值达到285 mm时,构件才发生断裂破坏.结论计算结果与试验结果吻合良好.笔者方法能够较为准确地模拟钢筋混凝土柱在双向弯曲荷载作用下的非线性及断裂破坏过程.双向弯曲耦合作用严重降低了钢筋混凝土柱的承载能力及耗能性能.研究成果可用于钢筋混凝土框架结构在强震下的倒塌过程模拟分析.
In order to analyze the whole collapse process of RC frame structure under strong earthquakes,nonlinear and fracture behaviors of RC columns under biaxially cyclic loading should be accurately simulated. Based on the explicit module of ABAQUS software,the configuration andelimination of fiber beam elements for RC beam-column member were studied. Taking into account of the material failure criterion,uniaxial constitutive models of concrete and steel were built,and corresponding computer subroutines were developed via the user material interface VUMAT.The nonlinear performance and fracture process of RC columns were simulated and studied under uniaxially and biaxially cyclic loading. Results showthat bearing capacities and stiffnesses of RC columns under bidirectional reciprocating loading,as well as the hysteresis pinch behavior and bibending coupling effect can be accurately simulated,when the loading amplitudes are smaller.When amplitudes of the horizontal displacement loads reach 45 mm,90mm and 165 mm respectively,the cover concrete,core concrete and steel bar are consequently destroyed and the specimen is broken. However,under uniaxially loading,when the amplitude of the horizontal displacement load reaches 285 mm,the specimen is broken. Conclusion is that the nonlinear and fracture process of RC column under biaxial loading can be accurately simulated based the proposed model. Analytic results agree well with experimental results. The biaxially bending coupling effect seriously reduces the load-carrying capacity and energy dissipation of RC column. The proposed method can be applied to analyze collapse process of RC frame structure under strong earthquakes.
引文
[1]邱法维,李文峰,潘鹏,等.钢筋混凝土柱的双向拟静力实验研究[J].建筑结构学报,2001,22(5):26-31.(Qiu Fawei,Li Wenfeng,Pan Peng,et al.Quasi-static test research of reinforced concrete column under biaxial loading[J].Journal of Building Structures,2001,22(5):26-31.)
    [2]马颖,张勤,贡金鑫,等.钢筋混凝土柱弯剪破坏恢复力模型骨架曲线[J].建筑结构学报,2013,33(10):116-125.(Ma Ying,Zhang Qin,Gong Jinxin,et al.Skeleton curves of restoring force model of reinforced concrete columns failed in flexure-shear[J].Jourmal of Building Structures,2012,33(10):116-125.)
    [3]Solberg K,Mashiko N,Mander J B,et al.Per-formance of a damage-protected highw ay bridge pier subjected to bidirectional earthquake attack[J].Journal of Structural Engineering,2009,135(5):469-478.
    [4]Khaled A,Massicotte B,Tremblay R.Cyclic testing of large-scale rectangular bridge columns under bidirectional earthquake components[J].Journal of Bridge Engineering,2011,16(3):351-363.
    [5]Elwood K J,Moehle J P.Dynamic shear and axial-load failure of reinforced concrete columns[J],Journal of Structural Engineering,2008,34(7):1189-1198.
    [6]顾祥林,黄庆华,汪小林,等.地震中钢筋混凝土框架结构倒塌反应的试验研究与数值仿真[J].土木工程学报,2012,45(9):36-45.(Gu Xianglin,Huang Qinghua,Wang Xiaolin,et al.Spatial collapse responses of reinforced concrete frame structures under earthquakes:test study and numerical simulation[J].China Civil Engineering Journal,2012,45(9):36-45.)
    [7]陆新征,李易,叶列平,等.钢筋混凝土框架结构抗连续倒塌设计方法的研究[J].工程力学,2008,25(2):150-157.(Lu Xinzheng,Li Yi,Ye Lieping,et al.Study on design method to resist progressive collapse for reinforced concrete frames[J].Engineering M echanics,2008,25(2):150-157.)
    [8]金浏,杜修力.钢筋混凝土构件细观数值模拟分析[J].水利学报,2012,43(10):1230-1236,1242.(Jin Liu,Du Xiuli.Meso numerical simulation of reinforced concrete members[J].Shuili Xuebao,2012,43(10):1230-1236,1242.)
    [9]Yi Zhuihua,Anil K.Agrawal finite element simulation of blast loads on reinforced concrete structures using LS-DYNA[D].Structures Congress2007:New Horizons and Better Practices,2007.
    [10]Favvata M T,Izzuddin B A,Karayannis C G.M odelling exterior beam-column joints for seismic analysis of RC frame structures[J].Earthquake Engineering and Structural Dynamics,2008,37(13):1527-1548.
    [11]庄茁,由小川,廖剑辉,等.基于ABAQUS的有限元分析和应用[M].北京:清华大学出版社,2009.(Zhuang Zhuo,You Xiaochuan,Liao Jianhui,et al.FEM analysis and application based on ABAQUS[M].Beijing:Tsinghua University Press,2009.)
    [12]ABAQUS Inc.ABAQUS User's Manual[M].2010.
    [13]张娟霞,唐春安,梁正召,等.受拉钢筋混凝土构件破坏过程的数值模拟[J].计算力学学报,2007,24(4):453-458,464.(Zhang Juanxia,Tang Chunan,Liang Zhengzhao,et al.Numerical simulation of failure process of reinforced concrete specimen under uniaxial tension[J].Chinese Journal of Computational M echanics,2007,24(4):453-458,464.)
    [14]王强,朱丽丽,李哲,等.ABAQUS显式分析梁单元的混凝土、钢筋本构模型研究[J].沈阳建筑大学学报:自然科学版,2013,29(1):56-64.(Wang Qiang,Zhu Lili,Li Zhe,et al.Study on the constitutive model of concrete and steel for explicit dynamic beam elements of ABAQUS[J].Journal of Shenyang Jianzhu University:Natural Science,2013,29(1):56-64.)
    [15]周彧,金伟良.基于离散单元法的框架填充墙裂缝数值模拟[J].建筑砌块与砌块建筑,2008(6):3-6.(Zhou Yu,Jin Weiliang.Numerical simulation on infill cracks of frame based on diserete elment method[J].Building Block&Block Building,2008(6):3-6.)
    [16]顾祥林,印小晶,林峰,等.建筑结构倒塌过程模拟与防倒塌设计[J].建筑结构学报,2010,31(6):179-187.(Gu Xiang Lin,Yin Xiaojing,Lin Feng,et al.Simulation of collapse process and design method to resist collapse for building structures[J].Journal of Building Structures,2010,31(6):179-187.)
    [17]Grassl P,Jirasek M.Meso-scale approach to modelling the fracture process zone of concrete subjected to uniaxial tension[J].International Journal of Solids and Structures,2010,47(7):957-968.
    [18]Kunnath S K,Heo Y,Mohle J F.Nonlinear uniaxial material model for reinforcing steel bars[J].Journal of Structural Engineering,2009,134(4):333-343.

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