锈蚀箍筋约束混凝土本构模型研究
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摘要
为研究锈蚀箍筋约束混凝土的本构模型,对箍筋锈蚀率、箍筋直径、箍筋间距、混凝土保护层等不同的混凝土棱柱体轴压试验数据进行了分析,得到各试件的混凝土应力-应变曲线;根据应力-应变曲线的形状和走势,并通过与现有约束混凝土本构模型的对比分析,提出了锈蚀箍筋约束混凝土本构模型的表达式;运用MATLAB软件对锈蚀箍筋约束混凝土的应力、应变数据进行非线性拟合,得到锈蚀箍筋约束混凝土本构模型的形状控制参数;最后对锈蚀箍筋约束混凝土应力-应变曲线形状控制参数、峰值点参数进行了回归分析,建立了锈蚀箍筋约束混凝土本构模型及其峰值点参数的计算模型。
In order to study the constitutive model of confined concrete by corroded stirrups,the data of the axial compression test of concrete prisms with different corrosion rate,diameter,spacing,concrete cover of stirrups were analyzed,and the concrete stress-strain curves of all specimens were obtained. According to the shape and trends of the stress-strain curves,and by comparative analysis with the existing constitutive model of confined concrete,the expression of the constitutive model of confined concrete by corroded stirrups is proposed. Using the MATLAB software,nonlinear fitting of the data of stress and strain is carried out,and the shape control parameters of the constitutive model of confined concrete by corroded stirrups is obtained. The regression analysis is made on the shape control parameters and peak point parameters of the concrete stress-strain curve further,and the computational model of the constitutive relation and the peak point parameters of confined concrete by corroded stirrups is established finally.
In order to study the constitutive model of confined concrete by corroded stirrups,the data of the axial compression test of concrete prisms with different corrosion rate,diameter,spacing,concrete cover of stirrups were analyzed,and the concrete stress-strain curves of all specimens were obtained. According to the shape and trends of the stress-strain curves,and by comparative analysis with the existing constitutive model of confined concrete,the expression of the constitutive model of confined concrete by corroded stirrups is proposed. Using the MATLAB software,nonlinear fitting of the data of stress and strain is carried out,and the shape control parameters of the constitutive model of confined concrete by corroded stirrups is obtained. The regression analysis is made on the shape control parameters and peak point parameters of the concrete stress-strain curve further,and the computational model of the constitutive relation and the peak point parameters of confined concrete by corroded stirrups is established finally.
引文
[1]赵瑞华.箍筋锈蚀对约束混凝土应力-应变关系的影响研究[D].西安:西安建筑科技大学,2010.
[2]刘磊.箍筋锈蚀对约束混凝土应力-应变关系的影响研究[D].西安:西安建筑科技大学,2011.
[3]郑山锁,关永莹,王萌,等.人工盐雾环境下锈蚀箍筋约束混凝土本构关系[J].建筑材料学报,2016,19(4):737-741,757.
[4]罗苓隆,过镇海.箍筋约束混凝土的受力机理及应力-应变曲线的计算[R].北京:清华大学抗震抗爆工程研究室,1996.
[5]肖建庄.再生混凝土单轴受压应力-应变全曲线试验研究[J].同济大学学报(自然科学版),2007,35(11):1445-1449.
[6]CHAN W W L.The ultimate strength and deformation of plastic hinges in reinforced concrete frameworks[J].Magazine of Concrete Research,1955,7(21):121-132.
[7]ROY H E H,SOZEN M A A.Model the ultimate strength and deformation of plastic hinges in reinforced concrete framework ading[R].Structural Research Series,No.268,Civil Engineering Studies,University of Illinois,Urbana,June 1963.
[8]SOLIMAN M T M,YU C W.The flexural stress-strain relationship of concrete confined by rectangular transverse reinforcement[J].Magazine of Concrete Research,Vol.19,No.61,Dec.1967:223-238.
[9]SARGIN M.Stress-strain relationship for concrete and the analysis of structural concrete sections[R].Study No.4,Solid Mechanics Div.Univ.of Waterloo,Ontario,Canada,1971,167.
[10]王铁成.混凝土结构设计原理[M].北京:中国建筑工业出版社,2006.
[11]林大炎.矩形箍筋约束的混凝土应力-应变全曲线研究[D].北京:清华大学,1980.
[12]SAATCIOGLU S M,RAZVI S R.Strength and ductility of confined concrete[J].ASCRCE,1992(6):1590-1607.
[13]钱稼茹,等.普通箍筋约束混凝土柱的中心受压性能[J].清华大学学报(自然科学版),2002,42(10):1369-1373.
[14]过镇海,张秀琴.混凝土的应力-应变全曲线的试验研究及其变形和破坏形态分析[R].清华大学建筑工程系,抗震工程研究室,1979,11.
[15]金伟良,赵羽习.混凝土结构耐久性[M].北京:科学出版社,2002.
[16]SARGIN M,HANDA V K.A general formulation for the stress-strain properties of concrete[R].Report No.3Solid Mechanics Div.,Univ.of Waterloo May,1969.
[17]段安.受冻融混凝土本构关系研究和冻融过程数值模拟[D].北京:清华大学,2009.
[2]刘磊.箍筋锈蚀对约束混凝土应力-应变关系的影响研究[D].西安:西安建筑科技大学,2011.
[3]郑山锁,关永莹,王萌,等.人工盐雾环境下锈蚀箍筋约束混凝土本构关系[J].建筑材料学报,2016,19(4):737-741,757.
[4]罗苓隆,过镇海.箍筋约束混凝土的受力机理及应力-应变曲线的计算[R].北京:清华大学抗震抗爆工程研究室,1996.
[5]肖建庄.再生混凝土单轴受压应力-应变全曲线试验研究[J].同济大学学报(自然科学版),2007,35(11):1445-1449.
[6]CHAN W W L.The ultimate strength and deformation of plastic hinges in reinforced concrete frameworks[J].Magazine of Concrete Research,1955,7(21):121-132.
[7]ROY H E H,SOZEN M A A.Model the ultimate strength and deformation of plastic hinges in reinforced concrete framework ading[R].Structural Research Series,No.268,Civil Engineering Studies,University of Illinois,Urbana,June 1963.
[8]SOLIMAN M T M,YU C W.The flexural stress-strain relationship of concrete confined by rectangular transverse reinforcement[J].Magazine of Concrete Research,Vol.19,No.61,Dec.1967:223-238.
[9]SARGIN M.Stress-strain relationship for concrete and the analysis of structural concrete sections[R].Study No.4,Solid Mechanics Div.Univ.of Waterloo,Ontario,Canada,1971,167.
[10]王铁成.混凝土结构设计原理[M].北京:中国建筑工业出版社,2006.
[11]林大炎.矩形箍筋约束的混凝土应力-应变全曲线研究[D].北京:清华大学,1980.
[12]SAATCIOGLU S M,RAZVI S R.Strength and ductility of confined concrete[J].ASCRCE,1992(6):1590-1607.
[13]钱稼茹,等.普通箍筋约束混凝土柱的中心受压性能[J].清华大学学报(自然科学版),2002,42(10):1369-1373.
[14]过镇海,张秀琴.混凝土的应力-应变全曲线的试验研究及其变形和破坏形态分析[R].清华大学建筑工程系,抗震工程研究室,1979,11.
[15]金伟良,赵羽习.混凝土结构耐久性[M].北京:科学出版社,2002.
[16]SARGIN M,HANDA V K.A general formulation for the stress-strain properties of concrete[R].Report No.3Solid Mechanics Div.,Univ.of Waterloo May,1969.
[17]段安.受冻融混凝土本构关系研究和冻融过程数值模拟[D].北京:清华大学,2009.