文章摘要
殷雨时,范颖芳,胡志强,武斌.基于两参数的FRP-混凝土界面黏结滑移本构关系研究[J].,2018,58(2):147-152
基于两参数的FRP-混凝土界面黏结滑移本构关系研究
Research on interfacial bond-slip constitutive relation between FRP and concrete based on two parameters
  
DOI:10.7511/dllgxb201802006
中文关键词: 混凝土  纤维增强复合材料(FRP)  界面  黏结滑移曲线  单剪试验  黏结应力
英文关键词: concrete  fiber reinforced polymer (FRP)  interface  bond-slip curve  single shear test  bond stress
基金项目:国家自然科学基金资助项目(51578099);辽宁省自然科学基金资助项目(20170540493);辽宁省交通高等专科学校技术应用型项目(lnccjyky201701).
作者单位
殷雨时,范颖芳,胡志强,武斌  
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中文摘要:
      为了解决纤维增强复合材料(FRP)-混凝土(以下简称RC)界面应力-滑移本构关系中参数多,且不利于工程测量的问题,设计一组具有不同混凝土强度(C30、C40、C50)且每一强度有6种不同界面粗糙程度的混凝土试件共计54个,通过单剪试验,并结合118组已有试验数据对界面参数进行精简,选择了更适合工程应用的两参数来表达RC界面本构关系.结果表明:采用改进后的两参数(混凝土抗压强度fc、混凝土表面粗糙度fi)来反映C30、C40、C50的RC界面黏结应力-滑移本构关系要优于现有大多数模型,fc对本构关系的贡献要大于fi.所提本构关系理论计算值小于实测值,最大误差为9%,具有一定安全储备,有利于工程实际应用.
英文摘要:
      In order to solve the problem that there are too many parameters in interfacial stress-slip constitutive relation between fiber reinforced polymer (FRP) and concrete (be short for RC) which are hard to measure for engineering, a total of fifty-four concrete pieces with a set of different strengths of concrete (C30, C40, C50) and six different interfacial roughness in each set are designed. Combining with 118 groups of existing experimental data to simplify the interfacial parameters, and adopting single shear test, the two parameter constitutive relation is established which is more suitable for engineering practical. Results show that the improved two parameters (concrete compressive strength fc, concrete surface roughness fi) can better reflect the RC interfacial bond stress-slip constitutive relation of C30, C40, C50 concrete than the most existing models, and the parameter fc is more significant in this constitutive relation than fi. The theoretical calculation value of the proposed constitutive relation is less than the measured value, the maximum error is 9%. The certain security reserve shows that it is helpful to engineering application.
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