To study the bond-slip behavior of the interface between the section steel and the high-strength self-compacting concrete, nine self-compacting concrete specimens with the section steel were launched for tests, with the thickness of the high-strength concrete protective layer and the length of the molding serving as the variable parameters. The specimens’ failure process, failure morphology, and crack formation pattern were observed. Specifically, the whole process load-slip curve of the loading end of the specimen was obtained, along with the study of the effect of various parameters on the specimen’s bond behavior. According to the findings, the ultimate bond strength of steel reinforced high-strength self-compacting concrete composite structure increases with the increase of thickness of the high-strength concrete protective layer, and the maximum increase was 94.9%; but it decreases with the increase of the embedded length of the section steel, and the maximum reduction is 38.1%. The shear stiffness of interfacial bonding first strengthens and then weakens by an increase in the protective layer thickness of high-strength self-compacting concrete, and the maximum increase was 85.1%. Meanwhile, it is marginally strengthened with the increase of the insertion length, and the maximum increase was 30%. Besides, the interface’s capacity for consuming energy has a tenuous relationship with its factors. With the increase of the thickness of the high-strength steel protective layer, the interface damage develops later. With the increase in the embedded depth of the section steel, the interface damage speed slows down. Finally, the calculation formula for the bond strength of steel reinforced high strength self-compacting concrete is proposed, which can predict the bond strength of section steel reinforced high strength self-compacting concrete well.
ZHANGS M, LIA D, WANGY Y,et al .Behavior of composite structural joints of Shenzhen Gangxia North large span underground transportation-hub structures integrated with overpass piers[J].Journal of Building Structures,2023,44(2):1-15.(in Chinese)
WUK, ZHENGH M, CHENF,et al .Bond failure and load transfer mechanism in steel and steel fiber reinforced concrete composite structures[J].Journal of Building Structures,2020, 41(10):129-138.(in Chinese)
[7]
KAMALM M, SAFANM A, BASHANDYA A,et al .Experimental investigation on the behavior of normal strength and high strength self-curing self-compacting concrete[J].Journal of Building Engineering,2018,16:79-93.
LÜM, ANX H, LIP F,et al .Review of smart production techniques for the entire self-compacting concrete production process[J].Journal of Tsinghua University (Science and Technology),2022,62(8):1270-1280.(in Chinese)
YANGY, GUOZ X, XUEJ Y,et al .Experiment study on bond slip behavior between section steel and concrete in SRC structures[J].Journal of Building Structures,2005,26(4):1-9.(in Chinese)
YANGY, GUOZ X, NIEJ G,et al .Study on numerical simulation technology of steel reinforced concrete structures using ANSYS[J].Engineering Mechanics,2006,23(4):79-85.(in Chinese)
ZHENGS S, DENGG Z, YANGY,et al .Experimental study of bond-slip performance between steel and concrete in src structures[J].Engineering Mechanics,2003,20(5):63-69.(in Chinese)
CHENZ P, ZHENGH H, XUEJ Y,et al .Push-out test on interface bond slip behavior and analysis on bond strength between steel and recycled coarse aggregate concrete[J].Journal of Building Structures,2013,34(5):130-138.(in Chinese)
YINGW D, CHENZ P .Interface bond force transfer mechanisms and its influence analysis between shape steel and high-strength concrete[J].China Civil Engineering Journal,2016, 49(9):53-63.(in Chinese)
WUK, XUJ N, CHENF, et al .Bond performance and interface damage analysis of shape steel and steel fiber reinforced concrete[J].Journal of Building Materials, 2020, 23(3): 572-580.(in Chinese)
WUK, CHENF, XUF Y,et al .Experimental study on interfacial bonding property and energy dissipation capacity between shape steel and steel fiber reinforced concrete[J].China Civil Engineering Journal, 2019, 52(3):1-11.(in Chinese)
[26]
应武挡. 型钢高强混凝土界面黏结滑移试验研究与理论分析[D]. 南宁: 广西大学, 2014.
[27]
YINGW D .Experimental study and theoretical analysis on bond-slip performance between shaped steel and high concrete in SRHC structures[D].Nanning: Guangxi University,2014. (in Chinese)
[28]
HUANGY, ZHAOP T, LUY Y,et al .Push-out tests of CFST columns strengthened with self-compacting and self-stressing concrete filled square steel tube[J].Journal of Constructional Steel Research,2022,193:107263.
[29]
SIEMPUR, KUMAR PANCHARATHIR .Numerical study on the bond behaviour of plain and ribbed bars in self-compacting concrete[J].Materials Today:Proceedings,2022,51:2587-2591.
[30]
DYBEŁP, KUCHARSKAM .Effect of bottom-up placing on bond properties of high-performance self-compacting concrete[J].Construction and Building Materials,2020, 243: 118182.
MENGL F, YEY H, CHENH,et al .Experimental study on bond slip behavior between section steel and self compacting concrete[J].Journal of Nanjing Tech University (Natural Science Edition),2017,39(2):83-90.(in Chinese)
[33]
ROZIÈREE, GRANGERS, TURCRYP,et al .Influence of paste volume on shrinkage cracking and fracture properties of self-compacting concrete[J].Cement and Concrete Composites,2007,29(8): 626-636.
CHENZ P, YINGW D .Push-out test on interface bond behavior between shape steel and high-strength concrete and interfacial bond-slip constitutive relation[J].Journal of Building Structures,2016,37(2):150-157.(in Chinese)
Metallic material-Tensile testing-Part 1:Method of test at room temperature:GB/T 228.1—2010 [S].Beijing:Standards Press of China,2010:9-15.(in Chinese)
ZHUANGJ P, ZHENGJ L .Experiment research on local bond performance between reinforcement and self-compacting concrete[J].Journal of Building Structures,2013,34(6):143-152.(in Chinese)
ZHENGS S, YANGY, XUEJ Y,et al .Study on bond-slip performance between steel and concrete in src structures[J].China Civil Engineering Journal,2002,35(4):47-51.(in Chinese)
CHENZ P, ZHOUW X, XUJ J .Experimental study on bond-slip behavior of steel reinforced high strength concrete after high temperature[J].Journal of Building Structures,2015,36(12):106-115.(in Chinese)
XUJ J, CHENZ P, XUEJ Y,et al .Failure mechanism of interface bond behavior between circular steel tube and recycled aggregate concrete by push-out test[J]. Journal of Building Structures, 2013, 34(7): 148-157.(in Chinese)
[51]
蔡四维,蔡敏 .混凝土的损伤断裂[M].北京:人民交通出版社,2000:74-75.
[52]
CAIS W, CAIM .Damage and fracture of concrete[M].Beijing:China Communications Press,2000:74-75.(In Chinese)
JIAH R, CHENZ P, CHENJ R .Research on interfacial bond behavior and constitutive equation of recycled aggregate concrete filled circle steel tube after exposure to high temperature[J].Engineering Mechanics,2021,38(10):119-133.(in Chinese)