碱矿渣混凝土受压应力-应变关系试验研究
|
摘要
为研究碱矿渣混凝土的受压应力-应变关系,分别制作单轴受压混凝土棱柱体标准试件和钢管约束条件钢管混凝土试件,开展单轴受压条件和钢管约束条件下碱矿渣混凝土受压应力-应变关系试验.结果表明:单轴受压条件下,碱矿渣混凝土立方体强度和棱柱体强度关系仍可采用现行规范建议式表示,采用无量纲两段式应力-应变关系模型拟合的单轴受压应力-应变关系与试验曲线结果吻合良好;钢管约束条件下,碱矿渣混凝土极限强度和极限应变均较单轴条件下有了明显提高,表明钢管约束作用能够较好地提高核心混凝土的强度和韧性性能;采用已有钢管约束核心混凝土应力-应变关系模型拟合的应力-应变关系曲线与试验曲线吻合较好.结果表明:现有普通混凝土应力-应变关系模型对单轴受压条件和钢管约束条件下碱矿渣混凝土仍然适用.
Standard specimen of uniaxial compression concrete prism and concrete filled stell tube(CFST)specimen were made to investigate the alkali-activated slag concrete(AASC) stress-strain relationship by the testing of uniaxial compression and steel tube constraints conditions. The test results show that the relationship between the cube strength and the prismatic strength can still be expressed by the present standard,and the fitted stress-strain relationship curve with the dimensionless two stage stress-strain relationship model is in good agreement with the test curve under uniaxial compression conditions. The ultimate strength and strain of AASC under steel tube constraints condition are significantly increased than those under uniaxial condition,which indicates that the steel tube confinement can improve the strength and toughness of core concrete,and the fitted stress-strain relationship curve with the stress-strain relationship model of the existing steel tube confined core concrete is in good agreement with the test curve. The results show that the existing stress-strain relation model of ordinary concrete is still applicable to AASC under uniaxial compression and steel tube constraints condition.
Standard specimen of uniaxial compression concrete prism and concrete filled stell tube(CFST)specimen were made to investigate the alkali-activated slag concrete(AASC) stress-strain relationship by the testing of uniaxial compression and steel tube constraints conditions. The test results show that the relationship between the cube strength and the prismatic strength can still be expressed by the present standard,and the fitted stress-strain relationship curve with the dimensionless two stage stress-strain relationship model is in good agreement with the test curve under uniaxial compression conditions. The ultimate strength and strain of AASC under steel tube constraints condition are significantly increased than those under uniaxial condition,which indicates that the steel tube confinement can improve the strength and toughness of core concrete,and the fitted stress-strain relationship curve with the stress-strain relationship model of the existing steel tube confined core concrete is in good agreement with the test curve. The results show that the existing stress-strain relation model of ordinary concrete is still applicable to AASC under uniaxial compression and steel tube constraints condition.
引文
[1]XI Yunfei,FROST R L,HE Hongping.Modification of the surfaces of Wyoming montmorillonite by the cationic surfactants alkyl trimethyl,dialkyl dimethyl,and trialkyl methyl ammonium bromides[J].Journal of Colloid and Interface Science,2007,305(1):150-158.
[2]袁晓辉,申晓伟.碱激发矿渣混凝土的补偿收缩性能试验研究[J].硅酸盐通报,2017,36(9):2987-2993.YUAN Xiaohui,SHEN Xiaowei.Experimental study on shrinkage compensation performance of alkali-activated slag concrete[J].Bulletin of the Chinese Ceramic Society,2017,36(9):2987-2993.
[3]谢辉,刘俊超,侯淑婧.碱矿渣泡沫混凝土的吸声性能试验研究[J].硅酸盐通报,2017,36(8):2775-2780.XIE Hui,LIU Junchao,HOU Shujing.Experimental study on sound absorption performance of alkali activated slag cement foam concrete[J].Bulletin of the Chinese Ceramic Society,2017,36(8):2775-2780.
[4]管丽佩,闻洋,韩正伟.矿渣混凝土与普通混凝土力学性能对比试验研究[J].混凝土,2016(12):79-82,89.GUAN Lipei,WEN Yang,HAN Zhengwei.Comparative research on mechanical properties of slag concrete and ordinary concrete[J].Concrete,2016(12):79-82,89.
[5]单继雄,陈伟,田亚坡,等.活性氧化镁对碱矿渣混凝土抗碳化性能影响研究[J].武汉理工大学学报,2015,37(1):10-15.SHAN Jixiong,CHEN Wei,TIAN Yapo,et al.Study on the effect of MgO on carbornation behavior of alkail-activatedslag concrete[J].Journal of Wuhan University of Technology,2015,37(1):10-15.
[6]费建刚,袁晓辉,申晓伟,等.碱矿渣混凝土基本力学性能试验研究[J].信阳师范学院学报(自然科学版),2017,30(3):484-488.FEI Jiangang,YUAN Xiaohui,SHEN Xiaowei,et al.Experimental study on basic mechanical properties of alkali-activated slag concrete[J].Journal of Xinyang Normal University(Natural Science Edition),2017,30(3):484-488.
[7]陈梦成,刘京剑,黄宏.钢管再生矿渣混凝土轴压短柱试验研究[J].建筑结构学报,2013,34(S1):281-287.CHEN Mengcheng,LIU Jingjian,HUANG Hong.Experimental study on recycled slag aggregate concrete-filled steel tubular columns under axial compression[J].Journal of Building Structures,2013,34(S1):281-287.
[8]袁晓辉,杜亚成,范剑锋.钢管碱激发矿渣混凝土柱偏压性能试验研究[J].信阳师范学院学报(自然科学版),2016,29(3):465-470.YUAN Xiaohui,DU Yacheng,FAN Jianfeng.Experimental research on mechanical behavior of alkali-activated slag concretefilled steel tubular columns under eccentric load[J].Journal of Xinyang Normal University(Natural Science Edition),2016,29(3):465-470.
[9]YUAN Xiaohui,CHEN Wei,LU Zhean,et al.Shrinkage compensation of alkali-activated slag concrete and microstructural analysis[J].Construction and Building Material,2014,66(15):422-428.
[10]KANG S P,KWON S J.Effects of red mud and alkali-activated slag cement on efflorescence in cement mortar[J].Construction and Building Materials,2017,133(15):459-467.
[11]中华人民共和国住房和城乡建设部.GB 50010-2010,混凝土结构设计规范[S].北京:中国建筑工业出版社,2010.Ministry of housing and urban rural development of people’s republic of china,GB 50010-2010,code for design of concrete structures[S].Beijing:China Architecture&Building Press,2010.
[12]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 Zhenhai,ZHANG Xiuqin,ZHANG Dacheng,et al.Experimental investigation of the complete stress-strain curve of concrete[J].Journal of Building Structures,1982,3(1):1-12.
[13]康洪震,张凯,马卫华,等.铁尾矿砂混凝土轴心受压应力-应变全曲线试验研究[J].建筑结构学报,2015,36(S2):373-378.KANG Hongzhen,ZHANG Kai,MA Weihua,et al.Experimental study on compressive stress-strain curves of ferrous tailings concrete[J].Journal of Building Structures,2015,36(S2):373-378.
[14]韩林海.钢管混凝土结构:理论与实践[M].北京:科学出版社,2007:101-118.HAN Linhai.Concrete-filled steel tube structure:Theory and practice[M].Beijing:Science Press,2007:101-118.
[2]袁晓辉,申晓伟.碱激发矿渣混凝土的补偿收缩性能试验研究[J].硅酸盐通报,2017,36(9):2987-2993.YUAN Xiaohui,SHEN Xiaowei.Experimental study on shrinkage compensation performance of alkali-activated slag concrete[J].Bulletin of the Chinese Ceramic Society,2017,36(9):2987-2993.
[3]谢辉,刘俊超,侯淑婧.碱矿渣泡沫混凝土的吸声性能试验研究[J].硅酸盐通报,2017,36(8):2775-2780.XIE Hui,LIU Junchao,HOU Shujing.Experimental study on sound absorption performance of alkali activated slag cement foam concrete[J].Bulletin of the Chinese Ceramic Society,2017,36(8):2775-2780.
[4]管丽佩,闻洋,韩正伟.矿渣混凝土与普通混凝土力学性能对比试验研究[J].混凝土,2016(12):79-82,89.GUAN Lipei,WEN Yang,HAN Zhengwei.Comparative research on mechanical properties of slag concrete and ordinary concrete[J].Concrete,2016(12):79-82,89.
[5]单继雄,陈伟,田亚坡,等.活性氧化镁对碱矿渣混凝土抗碳化性能影响研究[J].武汉理工大学学报,2015,37(1):10-15.SHAN Jixiong,CHEN Wei,TIAN Yapo,et al.Study on the effect of MgO on carbornation behavior of alkail-activatedslag concrete[J].Journal of Wuhan University of Technology,2015,37(1):10-15.
[6]费建刚,袁晓辉,申晓伟,等.碱矿渣混凝土基本力学性能试验研究[J].信阳师范学院学报(自然科学版),2017,30(3):484-488.FEI Jiangang,YUAN Xiaohui,SHEN Xiaowei,et al.Experimental study on basic mechanical properties of alkali-activated slag concrete[J].Journal of Xinyang Normal University(Natural Science Edition),2017,30(3):484-488.
[7]陈梦成,刘京剑,黄宏.钢管再生矿渣混凝土轴压短柱试验研究[J].建筑结构学报,2013,34(S1):281-287.CHEN Mengcheng,LIU Jingjian,HUANG Hong.Experimental study on recycled slag aggregate concrete-filled steel tubular columns under axial compression[J].Journal of Building Structures,2013,34(S1):281-287.
[8]袁晓辉,杜亚成,范剑锋.钢管碱激发矿渣混凝土柱偏压性能试验研究[J].信阳师范学院学报(自然科学版),2016,29(3):465-470.YUAN Xiaohui,DU Yacheng,FAN Jianfeng.Experimental research on mechanical behavior of alkali-activated slag concretefilled steel tubular columns under eccentric load[J].Journal of Xinyang Normal University(Natural Science Edition),2016,29(3):465-470.
[9]YUAN Xiaohui,CHEN Wei,LU Zhean,et al.Shrinkage compensation of alkali-activated slag concrete and microstructural analysis[J].Construction and Building Material,2014,66(15):422-428.
[10]KANG S P,KWON S J.Effects of red mud and alkali-activated slag cement on efflorescence in cement mortar[J].Construction and Building Materials,2017,133(15):459-467.
[11]中华人民共和国住房和城乡建设部.GB 50010-2010,混凝土结构设计规范[S].北京:中国建筑工业出版社,2010.Ministry of housing and urban rural development of people’s republic of china,GB 50010-2010,code for design of concrete structures[S].Beijing:China Architecture&Building Press,2010.
[12]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 Zhenhai,ZHANG Xiuqin,ZHANG Dacheng,et al.Experimental investigation of the complete stress-strain curve of concrete[J].Journal of Building Structures,1982,3(1):1-12.
[13]康洪震,张凯,马卫华,等.铁尾矿砂混凝土轴心受压应力-应变全曲线试验研究[J].建筑结构学报,2015,36(S2):373-378.KANG Hongzhen,ZHANG Kai,MA Weihua,et al.Experimental study on compressive stress-strain curves of ferrous tailings concrete[J].Journal of Building Structures,2015,36(S2):373-378.
[14]韩林海.钢管混凝土结构:理论与实践[M].北京:科学出版社,2007:101-118.HAN Linhai.Concrete-filled steel tube structure:Theory and practice[M].Beijing:Science Press,2007:101-118.