不同再生细骨料取代率下的再生混凝土单轴受压本构关系
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摘要
为研究不同再生细骨料取代率的再生混凝土单轴受压本构关系,进行了再生细骨料取代率为0、30%、50%、100%的再生混凝土的单轴受压试验,并获得应力-应变试验全曲线,分析了再生细骨料取代率对抗压强度、弹性模量、峰值应变和极限应变的影响规律,并通过拟合得到再生混凝土弹性模量、峰值应变及应力-应变全曲线的计算表达式。研究表明,随着再生细骨料取代率增大,再生混凝土的抗压强度、弹性模量呈下降趋势,而峰值应变和极限应变增大;再生混凝土的应力-应变全曲线形状与普通混凝土相似,基于过镇海模型拟合得到的再生混凝土应力-应变全曲线与试验全曲线吻合较好。
In order to study the uniaxial compressive constitutive relationship of recycled concrete with different recycled fine aggregate replacement rate,the uniaxial compression tests of recycled concrete with recycled fine aggregate replacement rate of 0,30%,50% and 100% were completed and the full curves of stress-strain tests were obtained.The effects of the recycled fine aggregate replacement rate on compressive strength,elastic modulus,peak strain and ultimate strain were analysed and the formulas of elastic modulus,peak strain and stress-strain full curve of recycled concrete were obtained by fitting.The results show that with the increase of recycled fine aggregate replacement rate,the strength and elastic modulus of the recycled concrete decrease,the peak strain and the ultimate strain increase.The stress-strain curves of recycled concrete are similar to those of the conventional concrete and the effect to fit the test stress-strain curve based on the model of GUO Zhenhai is better.
In order to study the uniaxial compressive constitutive relationship of recycled concrete with different recycled fine aggregate replacement rate,the uniaxial compression tests of recycled concrete with recycled fine aggregate replacement rate of 0,30%,50% and 100% were completed and the full curves of stress-strain tests were obtained.The effects of the recycled fine aggregate replacement rate on compressive strength,elastic modulus,peak strain and ultimate strain were analysed and the formulas of elastic modulus,peak strain and stress-strain full curve of recycled concrete were obtained by fitting.The results show that with the increase of recycled fine aggregate replacement rate,the strength and elastic modulus of the recycled concrete decrease,the peak strain and the ultimate strain increase.The stress-strain curves of recycled concrete are similar to those of the conventional concrete and the effect to fit the test stress-strain curve based on the model of GUO Zhenhai is better.
引文
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[14]陈宗平,徐金俊,郑华海,等.再生混凝土基本力学性能试验及应力应变本构关系[J].建筑材料学报,2013,16(1):24-32.
[15]徐明,王韬,陈忠范.高温后再生混凝土单轴受压应力-应变关系试验研究[J].建筑结构学报,2015,36(2):158-164.
[16]普通混凝土用砂、石质量及检验方法标准:JGJ 52-2006[S].
[17]混凝土和砂浆用再生细骨料:GB/T 25176-2010[S].
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[20]过镇海.混凝土的强度与变形-试验基础与本构关系[M].北京:清华大学出版社,1997
[2]BAIRAGI N K,RAVANDE K,PAREEK V K.Behaviour of concrete with different proportions of natural and recycled aggregates[J].Resources Conservation and Recycling,1993,9(3):109-126.
[3]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.
[4]邓志恒,杨海峰,林俊,等.再生混凝土应力-应变全曲线试验研究[J].混凝土,2008(11):22-24.
[5]徐亦冬,吴道尧,沈建生,等.高性能再生混凝土的单轴受压本构关系[J].建筑技术,2009,40(1):17-19.
[6]吴淑海,李晓文,肖慧,等.C30再生混凝土变形性能及应力-应变曲线试验研究[J].混凝土,2009(12):21-25.
[7]王雪婷,杨德健.再生混凝土单轴受压应力-应变全曲线试验[J].天津城市建设学院学报,2010,16(3):175-178.
[8]BELéN G F,FERNANDO M A,DIEGO C L,et al.Stress-strain relationship in axial compression for concrete using recycled saturated coarse aggregate[J].Construction and Building Materials,2011(25):2335-2342.
[9]杨海峰.再生混凝土受压本构关系及其与钢筋间黏结滑移性能研究[D].南宁:广西大学,2012.
[10]刘丰,柴圆圆,吴淑海,等.考虑应变软化的再生混凝土应力-应变全曲线方程[J].混凝土,2012(6):27-30.
[11]胡岳峰.再生粗骨料混凝土高温后受压本构曲线试验研究及有限元热传导分析[D].南宁:广西大学,2012.
[12]丁东方.再生混凝土单轴受压应力应变关系研究[J].低温建筑技术,2012(6):25-26.
[13]周静海,刘丹,董健飞.废弃纤维再生混凝土的本构关系[J].混凝土,2013(2):54-58.
[14]陈宗平,徐金俊,郑华海,等.再生混凝土基本力学性能试验及应力应变本构关系[J].建筑材料学报,2013,16(1):24-32.
[15]徐明,王韬,陈忠范.高温后再生混凝土单轴受压应力-应变关系试验研究[J].建筑结构学报,2015,36(2):158-164.
[16]普通混凝土用砂、石质量及检验方法标准:JGJ 52-2006[S].
[17]混凝土和砂浆用再生细骨料:GB/T 25176-2010[S].
[18]普通混凝土力学性能试验方法标准:GB/T 50081-2002[S].北京:中国建筑工业出版社,2003.
[19]中华人民共和国住房和城乡建设部.混凝土结构设计规范:GB 50010-2010[S].北京:中国建筑工业出版社,2010.
[20]过镇海.混凝土的强度与变形-试验基础与本构关系[M].北京:清华大学出版社,1997