(1 青岛理工大学土木工程学院, 青岛 266011; 2 西部绿色建筑国家重点实验室, 西安 710055;3 中建八局第一建设有限公司, 济南 250014)

摘要: 粘结力的存在是钢筋与混凝土共同发挥作用的基础,而冻融循环作用会对二者的粘结强度产生影响. 依据已有的冻融循环作用下钢筋与混凝土粘结强度试验数据,通过拟合公式分别分析了冻融循环次数、混凝土抗压强度、混凝土相对保护层厚度以及钢筋直径对粘结强度的影响. 最后建立了一个统一的包括多种影响因素在内的粘结强度预测模型,并通过与实际试验数据相比较发现拟合程度较好.

关键词: 冻融循环; 混凝土抗压强度; 相对保护层厚度; 钢筋直径; 粘结强度

中图分类号:TU528. 01 文献标志码:A 文章编号:1002-848X(2023)12-0068-06

DOI:10. 19701 / j. jzjg. 20201774

Research review of bond strength between steel bar and concrete in freeze-thaw cyclesbased on statistical analysis

CHAI Xin1, SHANG Huaishuai1,2, XIE Zonglong3

(1 School of Civil Engineering, Qingdao University of Technology, Qingdao 266011, China; 2 State Key Laboratoryof Green Building in Western China, Xi’ an 710055, China; 3 No. 1 Construction Co. , Ltd. of China ConstructionEighth Engineering Bureau, Jinan 250014, China)

Abstract: The existence of bond is the basis for reinforcing bar and concrete to work together, and the freeze-thaw cycleswill affect the bond strength of them. According to the existing experimental data of bond strength between reinforcing barand concrete under freeze-thaw cycles, the influences of freeze-thaw cycles, concrete compressive strength, concreterelative protective layer thickness and reinforcing bar diameter on bond strength were analyzed by fitting formulas. Finally,a unified bond strength prediction model including a variety of influencing factors was established. By comparing with theactual test data, it is found that the fitting degree is better.

Keywords: freeze-thaw cycle; compressive strength of concrete; relative protective layer thickness; reinforcing bardiameter; bond strength

∗国家自然科学基金(51778310),西部绿色建筑重点实验室(LSKF201909).

第一作者:柴鑫,硕士,主要从事钢筋混凝土耐久性能研究,Email:chaixinwn@ 163. com.

[引用本文] 柴鑫,商怀帅,解宗龙. 基于统计分析的冻融循环作用下钢筋与混凝土粘结强度研究综述[ J]. 建筑结构,2023,53(12):68-73. CHAI Xin ,SHANG Huaishuai,XIE Zonglong. Research review of bond strength between steelbar and concrete in freeze-thaw cycles based on statistical analysis [J]. Building Structure,2023,53(12):68-73