多因素对钢筋混凝土握裹力的影响及回归模型
刘斯凤 ， 郭泗军 ， 史翠平
(1_同济大学材料科学与工程学院，上海201804；
2．同济大学先进土木工程材料教育部重点实验室，上海201804)
摘要：研究了多因素(掺合料种类、水胶比、养护龄期、加速腐蚀制度)作用对钢筋混凝土握裹力的
影响，确定了各因素对钢筋混凝土握裹力变化的影响程度，并加以定量化表征，提出了多因素共同
作用影响钢筋混凝土握裹力变化的多元非线性回归分析模型．结果表明：在试验拟定的影响因素
中，钢筋混凝土握裹力存在最大值；各因素对钢筋混凝土握裹力的影响程度以水胶比和掺合料种
类最大，养护龄期次之，加速腐蚀制度最小；水胶比增大对钢筋混凝土握裹力产生负效应，养护龄
期增加对钢筋混凝土握襄力产生正效应．
关键词：握裹力；钢筋混凝土；贡献率；多元非线性回归分析
中图分类号：TU528．01 文献标志码：A doi：10．3969／j．issn．1007—9629．2016．01．027
Influence of M ulti-factors on Bond Strength of
Reinforced Concrete and Regression M odel
L U Sifeng ， GUO Sijun ， SHI Cuiping ，
(1．School of Materials Science and Engineering，Tongji University，Shanghai 201804，China；2．Key Laboratory of
Advanced Civil Engineering Materials of Ministry of Education，Tongji University，Shanghai 201804，China)
Abstract：The influence of multi—factors(admixture，water—cement ratio，curing age，accelerated corro—
sion regim es) on the bond strength between the steel and concrete was researched．The influence degree
of each factor on the bond strength between steel and concrete was determ ined．Besides， the m ultiple
nonlinear regression m odel was proposed． The experiment results show that the maxim um bond
strength between the steel and concrete is obtained for the specific factors．The influence of different fac—
tors on the bond strength of reinforced concrete iS different．The influence of water—cem ent ratio and ad—
mixture are most rem arkable。while the influence of accelerated corrosion regime iS not notable．The
multi—nonlinear regression model iS established to describe the influence of multi-factors on the bond
strength between the steel and concrete effectively．The bond strength of reinforced concrete decreases
with the increase of water—cem ent ratio and increases with the increase of curing age．Besides，change of
bond strength of reinforced concrete is different for different admixtures and different accelerated corro—
sion system s．
Key words：bond strength；reinforced concrete；contribution ratio；multiple nonlinear regression model
在钢筋混凝土结构建筑中，握裹力是钢筋和混
凝土得以共同工作的基础，其值大小主要取决于混
凝土与钢筋连接面上的化学胶结力和机械咬合力．
高强混凝土有助于化学胶结力和机械咬合力的提
高，因此，随着养护龄期的增加，水胶比小、水泥强度
大的高强钢筋混凝土握裹力越来越大 引．粉煤灰和

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