混凝土本构模型对柱受力性能影响的数值模拟分析
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摘要
基于OpenSees平台,分别采用Hognestad、Rüsch、Kent-park三种混凝土受压本构模型,对已有钢筋混凝土试验柱进行了低周反复加载模拟,分析了不同混凝土本构模型的模拟效果。在此基础上,进行了不同轴压比下混凝土模型对柱受力性能影响的数值分析。结果表明,各本构模型的模拟结果均能较为真实地反映混凝土柱实际承载力和延性规律;混凝土模型对柱正截面承载力的影响不大,而对延性的影响在轴压比较大(n≥0.3)时显著。
With finite element analysis program( Open Sees),low reversed cyclic loading was simulated on the tested RC column with different constitutive models including Hognestad,Rüsch and Kent-park. And simulation results were studied. In addition,the effect of constitutive model on mechanical behavior of columns under different axial load ratios was analyzed numerically. It is found that simulation results of the 3 different constitutive models can truly reflect bending capacity and ductility of real RC columns. Results also show that concrete model has little effect on normal section bending capacity of RC columns but significant impact on ductility,especially under a high axial load ratio( n≥0. 3).
With finite element analysis program( Open Sees),low reversed cyclic loading was simulated on the tested RC column with different constitutive models including Hognestad,Rüsch and Kent-park. And simulation results were studied. In addition,the effect of constitutive model on mechanical behavior of columns under different axial load ratios was analyzed numerically. It is found that simulation results of the 3 different constitutive models can truly reflect bending capacity and ductility of real RC columns. Results also show that concrete model has little effect on normal section bending capacity of RC columns but significant impact on ductility,especially under a high axial load ratio( n≥0. 3).
引文
[1]周文峰,黄宗明,白绍良.约束混凝土几种有代表性应力-应变模型及其比较[J].重庆建筑大学学报,2003,25(4).
[2]张秀琴,过镇海,王传志.反复荷载下箍筋约束混凝土的应力-应变全曲线方程[J].建筑结构学报,1982(9):16-20.
[3]过镇海,张秀琴.混凝土的应力-应变全曲线的试验研究[J].建筑结构学报,1982(1):14-18.
[4]SHEIKH,SHAMIM A.A Comparative Study of Confinement Models[J].Journal of The American Concrete Institute,1982,79(4):296-306.
[5]陈伟.基于Open Sees平台开发的混凝土滞回本构模型在结构分析中的应用[D].重庆:重庆大学,2012.
[6]黄扬.钢筋屈曲对柱抗震性能影响的试验研究[D].重庆:重庆大学,2012.
[7]HOGNESTAD E.Study of combined bending and axial load in reinforced concrete members[R].Champaign University of Illinois Engineering Experiment Station,1951.
[8]程文瀼,李爱群,等.混凝土结构设计原理上册[M].北京:中国建筑工业出版社,2012:17-18.
[9]KENT D,PARK R.Flexural members with confined concrete[J].Journal of the Structural Division,1971,97(7):1969-1990.
[10]SAATCIOGLU M,RAZVI S R.Strength and Ductility of Confine Concrete[J].Journal of Structural Engineering,1992,118(6):1590-1607.
[11]SCOTT B D,PARK R,PRIESTLEY M J.Stress-strain Behavior of Concrete Confined by Overlapping Hoops at Low and High Strain Rates[J].ACI Journal,1982,79:13-27.
[12]MENEGOTTO M,PINTO P E.Method of analysis for cyclically loaded RC plane frames including changes in geometry and non-elastic behavior of elements under combined normal force and bending[R].Preliminary Report,IABSE,Zurich,Switzerland,1973,13:15-22.
[13]FILIPPOU FILIPPOU F C,Popov E P,Bertero V V.Effects of Bond Deterioration on Hysteretic Behavior of Reinforced Concrete Joints[R].EERC Report,University of California at Berkeley,1983.
[14]MAZZONI S,MC KENNA F,FENVES G L.Open Sees command language manual[M].Berkeley:PEER,University of California,2007.
[2]张秀琴,过镇海,王传志.反复荷载下箍筋约束混凝土的应力-应变全曲线方程[J].建筑结构学报,1982(9):16-20.
[3]过镇海,张秀琴.混凝土的应力-应变全曲线的试验研究[J].建筑结构学报,1982(1):14-18.
[4]SHEIKH,SHAMIM A.A Comparative Study of Confinement Models[J].Journal of The American Concrete Institute,1982,79(4):296-306.
[5]陈伟.基于Open Sees平台开发的混凝土滞回本构模型在结构分析中的应用[D].重庆:重庆大学,2012.
[6]黄扬.钢筋屈曲对柱抗震性能影响的试验研究[D].重庆:重庆大学,2012.
[7]HOGNESTAD E.Study of combined bending and axial load in reinforced concrete members[R].Champaign University of Illinois Engineering Experiment Station,1951.
[8]程文瀼,李爱群,等.混凝土结构设计原理上册[M].北京:中国建筑工业出版社,2012:17-18.
[9]KENT D,PARK R.Flexural members with confined concrete[J].Journal of the Structural Division,1971,97(7):1969-1990.
[10]SAATCIOGLU M,RAZVI S R.Strength and Ductility of Confine Concrete[J].Journal of Structural Engineering,1992,118(6):1590-1607.
[11]SCOTT B D,PARK R,PRIESTLEY M J.Stress-strain Behavior of Concrete Confined by Overlapping Hoops at Low and High Strain Rates[J].ACI Journal,1982,79:13-27.
[12]MENEGOTTO M,PINTO P E.Method of analysis for cyclically loaded RC plane frames including changes in geometry and non-elastic behavior of elements under combined normal force and bending[R].Preliminary Report,IABSE,Zurich,Switzerland,1973,13:15-22.
[13]FILIPPOU FILIPPOU F C,Popov E P,Bertero V V.Effects of Bond Deterioration on Hysteretic Behavior of Reinforced Concrete Joints[R].EERC Report,University of California at Berkeley,1983.
[14]MAZZONI S,MC KENNA F,FENVES G L.Open Sees command language manual[M].Berkeley:PEER,University of California,2007.