摘要
为研究玻璃纤维增强复合材料(GFRP)筋与超高性能混凝土(UHPC)之间的粘结性能,故基于相关文献中153个拉拔试验和42个梁式试验的数据,系统分析了FRP筋直径、相对粘结长度、相对保护层厚度、超高性能混凝土抗压强度、FRP筋表面形态和试验方法对玻璃纤维增强复合材料筋粘结强度的影响规律,通过回归分析和区间预测提出了超高性能混凝土中玻璃纤维增强复合材料筋与粘结强度和锚固长度的计算公式。对比分析了已有FRP筋与普通混凝土之间的粘结-滑移本构模型,基于CMR模型提出了绕肋玻璃纤维增强复合材料筋与超高性能混凝土之间粘结-滑移本构模型的计算公式。上述公式计算结果与试验结果均吻合良好,并可为工程设计及后续研究提供依据。
To investigate the bond performance of glass fiber-reinforced polymer(GFRP)rebar and ultrahigh-performance concrete(UHPC),the influence of factors such as fiber-reinforced polymer(FRP)rebar diameter,relative embedment length,relative cover depth,UHPC compression strength,FRP rebar surface type,and test method for GFRP bond strength is systematically analyzed based on experimental data on 153 pullout tests and 42 beam tests.Using regression analysis and prediction interval,calculation formulas for bond strength and development length are proposed for GFRP rebars in UHPC.Available bond-slip constitutive models for FRP rebars in existing concrete are analyzed and compared,and equations for the bond-slip model of helically wrapped GFRP rebars in UHPC are proposed based on the Cosenza-Manfredi-Realfonzo model.The above formulas agree well with the test results and provide a basis for engineering design and follow-up research.
作者
薛文远
胡翔
薛伟辰
XUE Wenyuan;HU Xiang;XUE Weichen(Civil and Environmental Engineering Department,Stanford University,California 94305,USA;Department of Structural Engineering,Tongji University,Shanghai 200092,China)
出处
《哈尔滨工程大学学报》
EI
CAS
CSCD
北大核心
2023年第5期698-707,共10页
Journal of Harbin Engineering University
基金
国家自然科学基金项目(52130806、51678433)
宁波市科技创新2025重大专项(2020Z034)。
