依据《再生混凝土结构技术标准》（JGJ/T 443—2018）,按照再生粗骨料（RCA）掺入量0%、50%和100%制作18个试件并进行轴压力学性能试验,研究RCA取代率对圆钢管约束再生混凝土（RACCST）试件承载力和应力-应变关系的影响。结果表明：RACCST试件轴压极限荷载随RCA取代率增加而略有下降,基于Mander模型和试验数据,给出建议的RACCST应力-应变关系表达式。
Abstract
Based on recycled concrete structure technical standard （JGJ/T 443—2018）,18 specimens were made according to the mixing amount of recycled coarse aggregate （0%,50% and 100%）.The axial compression performance test was carried out to study the influence of recycled coarse aggregate （RCA） replacement ratio on the bearing capacity and stress-strain relationship of the recycled aggregate concrete confined by the circular steel tube（RACCST）.The results show that the ultimate load of RACCST decreased slightly with the increase of RCA replacement ratio. Based on the Mander model and test data, a modified stress-strain relationship of RACCST was analyzed by comparing to the existing models for confined concrete.
关键词
圆钢管约束再生混凝土 /
再生粗骨料取代率 /
轴压试验 /
应力-应变关系
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Key words
recycled aggregate concrete confined by circular steel tube /
replacement ratio of recycled coarse aggregate /
axial compression test /
stress-strain relationship
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参考文献
[1] 肖建庄. 再生混凝土创新研究与进展[M].北京:科学出版社,2020.
Xiao Jianzhuang.Research and progress on innovation of recycled concrete[M].Beijing:Science Press,2020.(in Chinese)
[2] 王长青,肖建庄,李秋义.箍筋约束再生混凝土力学行为分析[J].建筑结构,2019,49(S1):693-696.
Wang Changqing,Xiao Jianzhuang,Li Qiuyi.Analysis on mechanic behavior of recycled aggregate concrete confined with stirrups[J].Building Structure,2019,49(S1):693-696.(in Chinese)
[3] 胡耀文,李镜培,谢峰.再生混凝土抗渗性能试验研究[J].结构工程师,2020,36(3):160-166.
Hu Yaowen,Li Jingpei,Xie Feng.Experimental research on impermeability of recycled concrete[J].Structural Engineers,2020,36(3):160-166.(in Chinese)
[4] 肖建庄,杨洁,黄一杰,等.钢管约束再生混凝土轴压试验研究[J].建筑结构学报,2011,32(6):92-98.
Xiao Jianzhuang,Yang Jie,Huang Yijie,et al.Experimental study on recycled concrete confined by steel tube under axial compression[J].Journal of Building Structures,2011,32(6):92-98.(in Chinese)
[5] Xiao Jianzhuang,Huang Yijie,Yang Jie,et al.Mechanical properties of confined recycled aggregate concrete under axial compression[J].Construction and Building Materials,2012,26:591-603.
[6] 陈宗平,柯晓军,薛建阳,等.钢管约束再生混凝土的受力机理及强度计算[J].土木工程学报,2013,46(2):70-77.
Chen Zongping,Ke Xiaojun,Xue Jianyang,et al.Mechanical performance and ultimate bearing capacity calculation of steel tube confined recycled coarse aggregate concrete[J].China Civil Engineering Journal,2013,46(2):70-77.(in Chinese)
[7] 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.
Xiao Jianzhuang.Experimental investigation on complete stress-strain curve of recycled concrete under uniaxial loading[J].Journal of Tongji University(Natural Science Edition),2007,35(11):1445-1449.(in Chinese)
[8] 周绪红,刘界鹏.钢管约束混凝土柱的性能与设计[M].北京:科学出版社,2010.
Zhou Xuhong,Liu Jiepeng.Performance and design of steel tube confined concrete column[M].Beijing:Science Press,2010.(in Chinese)
[9] 周绪红,甘丹,刘界鹏.方钢管约束钢筋混凝土轴压短柱试验研究与分析[J].建筑结构学报,2011,32(2):68-74.
Zhou Xuhong,Gan Dan,Liu Jiepeng.Experiment and analysis on square tubed reinforced concrete stub columns under axial compression[J].Journal of Building Structures,2011,32(2):68-74.(in Chinese)
[10] Mander J B,Priestley M J N,Park R.Theoretical stress-strain model for confined concrete[J].Journal of the Structural Engineerin 1988,114(8):1804-1823
[11] 滕跃. 圆钢管约束高强混凝土的本构关系研究[D].重庆:重庆大学,2016.
Teng Yue.Research on constitutive relation of circular tube confined high strength concrete[D].Chongqing:Chongqing University,2016.(in Chinese)
[12] Mcateer Peter,Bonacci J F,Lachemi M.Composite response of high-strength concrete confined by circular steel tube[J].Structural Journal,2004,101(4):466-474.
[13] O'Shea M D,Bridge R Q.Design of circular thin-walled concrete filled steel tubes[J].Journal of Structural Engineering,2000,126(11):1295-1303.
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脚注
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基金
国家自然科学基金青年基金（41702300）
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