- 摘 要
-
(1 青島理工大學土木工程學院, 青島 266011; 2 西部綠色建筑國家重點實驗室, 西安 710055;3 中建八局第一建設有限公司, 濟南 250014)
摘要: 粘結力的存在是鋼筋與混凝土共同發(fā)揮作用的基礎,而凍融循環(huán)作用會對二者的粘結強度產(chǎn)生影響. 依據(jù)已有的凍融循環(huán)作用下鋼筋與混凝土粘結強度試驗數(shù)據(jù),通過擬合公式分別分析了凍融循環(huán)次數(shù)、混凝土抗壓強度、混凝土相對保護層厚度以及鋼筋直徑對粘結強度的影響. 最后建立了一個統(tǒng)一的包括多種影響因素在內(nèi)的粘結強度預測模型,并通過與實際試驗數(shù)據(jù)相比較發(fā)現(xiàn)擬合程度較好.
關鍵詞: 凍融循環(huán); 混凝土抗壓強度; 相對保護層厚度; 鋼筋直徑; 粘結強度
中圖分類號:TU528. 01 文獻標志碼:A 文章編號: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
∗國家自然科學基金(51778310),西部綠色建筑重點實驗室(LSKF201909).
第一作者:柴鑫,碩士,主要從事鋼筋混凝土耐久性能研究,Email:chaixinwn@ 163. com.
[引用本文] 柴鑫,商懷帥,解宗龍. 基于統(tǒng)計分析的凍融循環(huán)作用下鋼筋與混凝土粘結強度研究綜述[ J]. 建筑結構,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
