Transactions of Materials and Heat Treatment

Title：Failure study and process optimization on straight thread mechanical connection on HRB500 rebar

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ClassificationCode：TG306

year,vol(issue):pagenumber：2021,46(3):138-145

Abstract：

The process of necking-rolling straight thread mechanical connection on HRB400 rebar has been widely used in practical construction projects, but the performance stability of the products connected by necking-rolling straight thread mechanical connection on HRB400 rebar promoted by China is poor. Therefore, the metal flow during the necking process of HRB500 rebar was studied by computer numerical simulation, and the failure fracture of the straight thread mechanical connection on HRB500 rebar was studied from the two aspects of macro performances and micro characteristics to confirm the cause of the connection failure. Furthermore, in the process of necking, the metal flow velocity of transverse rib was different, and the microcracks were formed to cause stress concentration. In addition, the plastic deformation during the necking process was extremely uneven, and the tensile plasticity was reduced. Thus, the optimization process of rebar mechanical connection with stripping-necking-rolling straight thread was proposed, and the reasonable stripping process parameters of base material diameter +2 mm after stripping the ribs of rebar above Ф32 mm were given.

Funds：

河北省科技厅基金项目（18211043）;北华航天工业学院基金项目（ZD-2020-02，KY-2018-27）;廊坊市科技局基金项目（2018011047）

刘翊安（1987-），男，硕士，讲师 E-mail：liuyian13@sina.com 通讯作者：庞国星（1963-），男，博士，教授 E-mail：panglfht@163.com

Reference：

[1]全国高强钢筋推广应用生产技术指导组.高强钢筋生产技术指南[M].北京：冶金工业出版社，2013.

National High Strength Bars Promotion Application Production Technical Guidance Group. High Strength Bars Production Technology Guide [M]. Beijing: Metallurgical Industry Press, 2013.

[2]住房和城乡建设部,工业和信息化部.关于加快应用高强钢筋的指导意见[ER/OL]. http://www.mohurd.gov.cn/wjfb/201201/t20120118_208485.html，2012-01-04.

MOHURD, MIIT. Guidance on accelerating the application of high strength bars [ER/OL]. http://www.mohurd.gov.cn/wjfb/201201/t20120118_208485.html，2012-01-04.

[3]Lu P Y, Liu Y, Wu H J, et al. Fatigue performance of microalloyed highstrength rebar and analysis of fracture mechanism[J]. Journal of Iron and Steel Research International,2015,22(12): 1149-1155.

[4]刘军,梁斌.台山EPR核电站钢筋施工管理[J].施工技术,2013,42(10):30-33.

Liu J，Liang B. Construction management of reinforcement in Taishan EPR nuclear power station [J]. Construction Technology, 2013, 42 (10):30-33.

[5]刘子金，肖飞.HRB400 级钢筋剥肋滚压直螺纹连接技术[J].施工技术，2001,30（10）：19-21.

Liu Z J, Xiao F. Ribcut rolled straight thread splice technique of HRB400 reinforcement[J]. Construction Technology, 2001,30（10）：19-21.

[6]严跃兰. 岭澳核电站核岛粗钢筋连接中机械接头与锚固块的应用[J].建筑技术,2003，(5):365-366.

Yan Y L. Application of anchor block and mechanical splicing of thick reinforcing bar connection in the nuclear island of Ling′ao nuclear power station[J].Architecture Technology, 2003,(5):365-366.

[7]王元清，周晖，陈月平，等.北方某高铁客运站钢筋直螺纹套筒连接低温疲劳试验[J].沈阳建筑大学学报：自然科学版，2012,28（6）：961-966.

Wang Y Q, Zhou H, Chen Y P, et al. Low temperature fatigue tests of reinforced straight thread sleeve connections of a high speed railway station in northern China[J]. Journal of Shenyang Jianzhu University：Natural Science, 2012,28（6）：961-966.

[8]钟群鹏，赵子华.断口学[M].北京：高等教育出版社，2006.

Zhong Q P, Zhao Z H. Fractography[M]. Beijing: Higher Education Press,2006.

[9]孙莹,于庆波.低碳钢的解理断裂机理及微观形貌分析[J].昆明理工大学学报：自然科学版,2011,36(4):18-22.

Sun Y，Yu Q B. Cleavage fracture mechanics and micromorphology analysis of low carbon steel[J]. Journal of Kunming University of Science and Technology：Natural Science, 2011,36(4):18-22.

[10]崔约贤，王长利.金属断口分析[M].哈尔滨：哈尔滨工业大学出版社，1998.

Cui Y X, Wang C L. Metallic Fracture Analysis[M]. Harbin: Harbin Institute of Technology Press,1998.

[11]姜锡山，赵晗.钢铁显微断口速查手册[M].北京：机械工业出版社，2010.

Jiang X S, Zhao H. Steel Microfracture Quick Check Manual[M]. Beijing: Machinery Industry Press，2010.

[12]郭江培,顾欣欣,丛新，等.混凝土中钢筋锈蚀问题及解决措施[J].中山大学研究生学刊：自然科学-医学版,2017,38(2):1-7.

Guo J P，Gu X X，Cong X, et al. Corrosion of reinforcement in concrete and its solution[J]. Journal of the Graduates Sun YatSen University：Natural Sciences-Medicine,2017,38(2):1-7.

[13]顾晓良,柳嘉伟,焦宝祥，等.聚苯胺改性水泥基防锈涂料的研制[J].新型建筑材料,2018,45(4):99-102,137.

Gu X L，Liu J W，Jiao B X, et al. Preparation of PANImodified cementbased antirust coatings[J]. New Building Materials,2018,45(4):99-102,137.

[14]干伟忠,金伟良,徐天宁.不同连接组合钢筋的宏电池腐蚀行为[J].建筑材料学报,2009,12(6):699-705.

Gan W Z, Jin W L, Xu T N. Macrocell corrosion behavior of steel bar with different connection[J]. Journal of Building Materials, 2009,12(6):699-705.

[15]GB/T1499.2—2018,钢筋混凝土用钢：第2部分热轧带肋钢筋[S].

GB/T1499.2—2018, Steel for the reinforcement of concrete—Part 2: Hot rolled ribbed bars[S].

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