多因素对钢筋混凝土握裹力的影响及回归模型  

Influence of Multi-factors on Bond Strength of Reinforced Concrete and Regression Model

作　　者：刘斯凤[1,2] 郭泗军 史翠平[1,2] 

机构地区：[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

出　　处：《建筑材料学报》2016年第1期162-165,203,共5页Journal of Building Materials

基　　金："十二五"国家科技支撑计划项目(2012BAJ20B02);国家重点基础研究发展计划(973计划)项目(2011CB013800)

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裹力产生正效应.The influence of multi-factors（admixture,water-cement ratio,curing age,accelerated corrosion regimes）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 determined.Besides,the multiple nonlinear regression model was proposed. The experiment results show that the maximum bond strength between the steel and concrete is obtained for the specific factors.The influence of different factors on the bond strength of reinforced concrete is different.The influence of water-cement ratio and admixture are most remarkable,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-cement 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 corrosion systems.

关 键 词：握裹力 钢筋混凝土 贡献率 多元非线性回归分析 

分 类 号：TU528.01[建筑科学—建筑技术科学]