Experimental Research on Axial Compressive Performance of Reinforced Concrete Columns Strengthened with CFRP Sheets Bonded by Magnesium Phosphate Inorganic Adhesive

YAN Kai; LI Yao; YUAN Tianfeng; SONG Yuanbo; ZHANG Qian; ZHANG Xin

doi:10.3724/j.gyjzG25081603

Volume 55 Issue 10

Oct. 2025

Turn off MathJax

Article Contents

Article Navigation > INDUSTRIAL CONSTRUCTION > 2025 > 55(10): 35-46

YAN Kai, LI Yao, YUAN Tianfeng, SONG Yuanbo, ZHANG Qian, ZHANG Xin. Experimental Research on Axial Compressive Performance of Reinforced Concrete Columns Strengthened with CFRP Sheets Bonded by Magnesium Phosphate Inorganic Adhesive[J]. INDUSTRIAL CONSTRUCTION, 2025, 55(10): 35-46. doi: 10.3724/j.gyjzG25081603

Citation:

YAN Kai, LI Yao, YUAN Tianfeng, SONG Yuanbo, ZHANG Qian, ZHANG Xin. Experimental Research on Axial Compressive Performance of Reinforced Concrete Columns Strengthened with CFRP Sheets Bonded by Magnesium Phosphate Inorganic Adhesive[J]. INDUSTRIAL CONSTRUCTION, 2025, 55(10): 35-46. doi: 10.3724/j.gyjzG25081603

Citation:

YAN Kai, LI Yao, YUAN Tianfeng, SONG Yuanbo, ZHANG Qian, ZHANG Xin. Experimental Research on Axial Compressive Performance of Reinforced Concrete Columns Strengthened with CFRP Sheets Bonded by Magnesium Phosphate Inorganic Adhesive[J]. INDUSTRIAL CONSTRUCTION, 2025, 55(10): 35-46. doi: 10.3724/j.gyjzG25081603

PDF( 2162 KB)

Experimental Research on Axial Compressive Performance of Reinforced Concrete Columns Strengthened with CFRP Sheets Bonded by Magnesium Phosphate Inorganic Adhesive

doi: 10.3724/j.gyjzG25081603

YAN Kai^1,2,
LI Yao^1,2,
YUAN Tianfeng^{1,2
,
,},
SONG Yuanbo^1,2,
ZHANG Qian^1,2,
ZHANG Xin^1,2

1. School of Civil Engineering, Shandong Jianzhu University, Jinan 250101, China;
2. Key Lab of Building Structural Retrofitting and Underground Space Engineering of the Ministry of Education, Shandong Jianzhu University, Jinan 250101, China

Received Date: 2025-08-16
Publish Date: 2025-10-31

Abstract

Abstract

To investigate the feasibility of replacing traditional epoxy resin with magnesium phosphate inorganic adhesive （MPIA） for carbon fiber reinforced polymer （CFRP） sheet-strengthened reinforced concrete （RC） columns， axial compression tests were conducted on eleven RC square columns. The experimental variables included adhesive type， the number of CFRP sheet layers， and the amount of transverse reinforcement， in order to evaluate load–vertical strain curves， transverse strain development， and the displacement ductility factor. The study examined the damage evolution and failure mechanisms of the CFRP sheet-strengthened columns， revealed the synergistic mechanism between the CFRP sheets and MPIA， and analyzed the enhancement effect of MPIA-bonded CFRP sheets on axial compressive performance. Test results indicated that both MPIA and epoxy resin effectively confined the core concrete， with MPIA-strengthened columns exhibiting a greater improvement in bearing capacity. In addition， CFRP sheet-strengthened specimens using MPIA exhibited lower ductility than those using epoxy resin， but performed better than other inorganic adhesive systems. Furthermore， based on design codes and literature research， this study modified existing predictive models and proposed a method for calculating the axial compressive capacity of CFRP sheet-strengthened RC square columns using MPIA as the adhesive.

FullText(HTML)

References(26)

References

[1]	张鑫，李士彬，杨莅滦. 无机胶粘结碳纤维布加固混凝土梁受弯性能试验研究[J]. 建筑结构学报，2010，31（增刊2）:249-254.
[2]	秦继辉，钱觉时，宋庆，等. 磷酸镁水泥的研究进展与应用[J]. 硅酸盐学报，2022，50（6）:1592-1606.
[3]	李元. 无机胶凝材料在加固混凝土结构中的性能研究[D]. 哈尔滨:哈尔滨工业大学，2012.
[4]	李悦，白伟亮，施同飞，等. 用MPC黏结CFRP布约束混凝土柱轴压试验研究[J]. 北京工业大学学报，2017，43（3）:467-472.
[5]	任建国. 磷酸镁水泥改性及粘结碳纤维布加固混凝土梁试验研究[D]. 济南:山东建筑大学，2022.
[6]	华思维. 不同CFRP加固方案下钢筋-海水海砂混凝土柱的偏心受压试验研究[D]. 大连:大连理工大学，2024.
[7]	赵振宇，宋帅，田震，等. CFRP约束再生混凝土桥墩抗震性能及生态效益研究[J]. 震灾防御技术，2024，19（4）:736-746.
[8]	LIU S，YAN K，REN P，et al. High temperature-resistance modification of the magnesium phosphate inorganic adhesive and its bond properties between CFRP sheets and concrete[J]. Case Studies in Construction Materials，2024，20，e03136.
[9]	中华人民共和国住房和城乡建设部. 混凝土物理力学性能试验方法标准:GB/T 50081—2019[S]. 北京:中国建筑工业出版社，2019.
[10]	国家标准化管理委员会. 金属材料拉伸试验第1部分:室温试验方法:GB/T 228.1—2021 [S]. 北京:中国标准出版社，2021.
[11]	中国菱镁行业协会. 磷酸镁复合材料:T/CMMA 10—2023[S]. 北京:中国标准出版社，2023.
[12]	中华人民共和国住房和城乡建设部. 工程结构加固材料安全性鉴定技术规范:GB 50728—2011[S]. 北京:中国建筑工业出版社，2011.
[13]	BAYRAK O，SHEIKH S A. Confinement reinforcement design considerations for ductile HSC columns[J]. Journal of Structural Engineering，1998，124（9）:999-1010.
[14]	王代玉. FRP加固非延性钢筋混凝土框架结构抗震性能试验与分析[D]. 哈尔滨:哈尔滨工业大学，2012.
[15]	WANG D Y，WANG Z Y，SMITH S T，et al. Size effect on axial stress-strain behavior of CFRP-confined square concrete columns[J]. Construction and Building Materials，2016； 118:116-126.
[16]	LIU W W，OUYANG L J，GAO W Y，et al. Repair of fire-damaged RC square columns with CFRP textile-reinforced ECC matrix[J]. Engineering Structures，2023，292，116530.
[17]	NGO D Q，NGUYEN H C，MAI D L. Experimental and numerical evaluation of concentrically loaded RC columns strengthening by textile reinforced concrete jacketing[J]. Civil Engineering Journal，2020，6（8）:1428-1442.
[18]	TOSKA K，FALESCHINI F，ZANINI M A，et al. Repair of severely damaged RC columns through FRCM composites[J]. Construction and Building Materials，2021，273，121739.
[19]	沈惠军，郑和晖，张峰，等. 新型BFRP布加固混凝土方柱轴压性能试验研究[J]. 复合材料科学与工程，2023（9）:106-111.
[20]	LAM L，TENG J G． Design-oriented stress-strain model for FRP-confined concrete[J] ． Construction Building Materials，2003，17（6/ 7）:471-489．
[21]	JIANG T，TENG J G． Analysis-oriented stress-strain models for FRP confined concrete[J] ． Engineering Structures，2007，29（11）:2968-2986．
[22]	中华人民共和国住房和城乡建设部. 混凝土结构加固设计规范:GB 50367—2013[S]. 北京:中国建筑工业出版社，2013.
[23]	American Concrete Institute（ACI）C Guide for the design and construction of externally bonded FRP systems for strengthening concrete structures:2R-17[S] ． Detroit:ACI，2017．
[24]	European Committee for Standardization（CEN）. Eurocode 2 design of concrete structures part 1-1:general rules and rules for buildings，bridges and civil engineering structures:EN 1992-1-1[S]. Brussels:CEN，2023.
[25]	MANDER J B，PRIESTLEY M J N，PARK R. Theoretical stress-strain model for confined concrete[J]. Journal of Structural Engineering，1988，114（8）:1804-1826.
[26]	XIAO Q G，TENG J G，YU T． Behavior and modeling of confined high-strength concrete[J]. Journal of Composites for Construction，2010（14）:249-259．