基于改进纤维模型的RC剪力墙静力弹塑性分析
|
摘要
为了使纤维模型能够有效模拟剪切效应,提出了一种基于塑性理论和虚拟单元法的改进纤维模型RC剪力墙全过程静力弹塑性分析方法.推导出等效单轴应力和等效单轴应变的计算公式,在纤维层面建立考虑剪切效应的应力和应变关系,将纤维由多轴受力状态等效为单轴受力状态,引入虚拟单元法来解决有限元数值计算过程中遇到的负刚度问题.利用自编程序及ABAQUS软件对一片钢筋混凝土剪力墙进行静力弹塑性分析,结果表明,自编程序计算曲线与试验曲线及ABAQUS软件计算曲线吻合较好,能够反映出剪切效应的影响.改进的分析方法简便有效,便于编程,可用于分析剪切效应明显的钢筋混凝土剪力墙构件.
In order to ensure the effective simulation of fiber model on the shear effect,a full static elasto-plastic analysis method for reinforced concrete(RC) shear wall with the improved fiber model based on plastic theory and virtual-element method was proposed.The calculation formulas for the equivalent uniaxial stress and strain were derived to establish the stress-strain relationship with considering the shear effect in the fiber layer.The multiaxial stress state of the fiber was equivalently converted into the uniaxial stress state.The virtual-element method was introduced to solve the negative stiffness problem in the finite element calculation process.The self-compiled program and ABAQUS software were used to carry out the static elasto-plastic analysis for a RC shear wall.The results indicate that the curves calculated with the self-compiled program are well accordant to those attained with both experiment and ABAQUS software,and can reflect the influence of shear effect.The improved analysis method is simple and effective as well as easy in programming,and can be applied to analyze the RC shear wall components with obvious shear effect.
In order to ensure the effective simulation of fiber model on the shear effect,a full static elasto-plastic analysis method for reinforced concrete(RC) shear wall with the improved fiber model based on plastic theory and virtual-element method was proposed.The calculation formulas for the equivalent uniaxial stress and strain were derived to establish the stress-strain relationship with considering the shear effect in the fiber layer.The multiaxial stress state of the fiber was equivalently converted into the uniaxial stress state.The virtual-element method was introduced to solve the negative stiffness problem in the finite element calculation process.The self-compiled program and ABAQUS software were used to carry out the static elasto-plastic analysis for a RC shear wall.The results indicate that the curves calculated with the self-compiled program are well accordant to those attained with both experiment and ABAQUS software,and can reflect the influence of shear effect.The improved analysis method is simple and effective as well as easy in programming,and can be applied to analyze the RC shear wall components with obvious shear effect.
引文
[1]吕西林,卢文生.纤维墙元模型在剪力墙结构非线性分析中的应用[J].力学季刊,2005,26(1):72-80.(LV Xi-lin,LU Wen-sheng.Application of fiber wallelement model in nonlinear analysis of shear wallstructures[J].Chinese Quarterly of Mechanics,2005,26(1):72-80.)
[2]Petrangeli M.Fiber element for cyclic bending andshear of RC structures.II:verification[J].Journal ofEngineering Mechanics,1999,125(9):1002-1009.
[3]D’Ambrisi A,Filippou F C.Modeling of cyclic shearbehavior in RC members[J].Journal of StructuralEngineering,1999,125(10):1143-1149.
[4]Marini A,Spacone E.Analysis of reinforced concreteelements including shear effects[J].ACI StructuralJournal,2006,103(5):645-655.
[5]张强,周德源,朱梦阳,等.考虑剪切变形的RC结构梁柱单元模型[J].江苏大学学报:自然科学版,2009,30(3):313-316.(ZHANG Qiang,ZHOU De-yuan,ZHU Meng-yang,et al.RC structure beam column model with conside-ration of shearing deformation[J].Journal of JiangsuUniversity:Natural Science Edition,2009,30(3):313-316.)
[6]伍永飞,周德源.钢筋混凝土框架结构非线性全过程分析的一种新方法[J].地震工程与工程震动,2006,26(4):42-46.(WU Yong-fei,ZHOU De-yuan.A new method infull-range nonlinear analysis of RC frame[J].Earth-quake Engineering and Engineering Vibration,2006,26(4):42-46.)
[7]冯世平,沈聚敏.钢筋砼杆系结构的非线性全过程分析[J].建筑结构学报,1989,10(4):1-11.(FENG Shi-ping,SHEN Ju-min.Full-range nonlinearanalysis of reinforced concrete member system struc-ture[J].Journal of Building Structure,1989,10(4):1-11.)
[8]过镇海,张秀琴,张达成,等.混凝土应力应变全曲线的试验研究[J].建筑结构学报,1982,3(1):1-12.(GUO Zhen-hai,ZHANG Xiu-qin,ZHANG Da-cheng,et al.Experimental investigation of completestress-strain curve of concrete[J].Journal of BuildingStructure,1982,3(1):1-12.)
[9]陈勤,钱稼茹,李耕勤.剪力墙受力性能的宏模型静力弹塑性分析[J].土木工程学报,2004,37(3):35-43.(CHEN Qin,QIAN Jia-ru,LI Geng-qin.Static elastic-plastic analysis of shear walls with macro-model[J].China Civil Engineering Journal,2004,37(3):35-43.)
[10]陈曦,周德源.五种本构模型在钢管混凝土有限元中的比较[J].工程力学,2009,26(6):116-121.(CHEN Xi,ZHOU De-yuan.Comparison among fiveconstitutive models in finite element analysis of con-crete-filled steel tube[J].Engineering Mechanics,2009,26(6):116-121.)
[2]Petrangeli M.Fiber element for cyclic bending andshear of RC structures.II:verification[J].Journal ofEngineering Mechanics,1999,125(9):1002-1009.
[3]D’Ambrisi A,Filippou F C.Modeling of cyclic shearbehavior in RC members[J].Journal of StructuralEngineering,1999,125(10):1143-1149.
[4]Marini A,Spacone E.Analysis of reinforced concreteelements including shear effects[J].ACI StructuralJournal,2006,103(5):645-655.
[5]张强,周德源,朱梦阳,等.考虑剪切变形的RC结构梁柱单元模型[J].江苏大学学报:自然科学版,2009,30(3):313-316.(ZHANG Qiang,ZHOU De-yuan,ZHU Meng-yang,et al.RC structure beam column model with conside-ration of shearing deformation[J].Journal of JiangsuUniversity:Natural Science Edition,2009,30(3):313-316.)
[6]伍永飞,周德源.钢筋混凝土框架结构非线性全过程分析的一种新方法[J].地震工程与工程震动,2006,26(4):42-46.(WU Yong-fei,ZHOU De-yuan.A new method infull-range nonlinear analysis of RC frame[J].Earth-quake Engineering and Engineering Vibration,2006,26(4):42-46.)
[7]冯世平,沈聚敏.钢筋砼杆系结构的非线性全过程分析[J].建筑结构学报,1989,10(4):1-11.(FENG Shi-ping,SHEN Ju-min.Full-range nonlinearanalysis of reinforced concrete member system struc-ture[J].Journal of Building Structure,1989,10(4):1-11.)
[8]过镇海,张秀琴,张达成,等.混凝土应力应变全曲线的试验研究[J].建筑结构学报,1982,3(1):1-12.(GUO Zhen-hai,ZHANG Xiu-qin,ZHANG Da-cheng,et al.Experimental investigation of completestress-strain curve of concrete[J].Journal of BuildingStructure,1982,3(1):1-12.)
[9]陈勤,钱稼茹,李耕勤.剪力墙受力性能的宏模型静力弹塑性分析[J].土木工程学报,2004,37(3):35-43.(CHEN Qin,QIAN Jia-ru,LI Geng-qin.Static elastic-plastic analysis of shear walls with macro-model[J].China Civil Engineering Journal,2004,37(3):35-43.)
[10]陈曦,周德源.五种本构模型在钢管混凝土有限元中的比较[J].工程力学,2009,26(6):116-121.(CHEN Xi,ZHOU De-yuan.Comparison among fiveconstitutive models in finite element analysis of con-crete-filled steel tube[J].Engineering Mechanics,2009,26(6):116-121.)
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心