| 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. |
| 关键词: 握裹力 钢筋混凝土 贡献率 多元非线性回归分析 |
| DOI：103969/j.issn1007 9629201601027 |
| 分类号: |
| 基金项目:“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) |
|
| Influence of Multi factors on Bond Strength of Reinforced Concrete and Regression Model |
|
LIU Sifeng, GUO Sijun, SHI Cuiping
|
|
School of Materials Science and Engineering, Tongji University, Shanghai 201804, China
|
| Abstract: |
| 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. |
| Key words: bond strength reinforced concrete contribution ratio multiple nonlinear regression model |
