应变硬化水泥基复合材料增强钢筋混凝土构件受弯性能试验研究  

Experimental study on bending performance of strain hardening cementitious composite material strengthening reinforced concrete components

作　　者：侯昌明 张朔 陈晓 杨智峰 张永兴[2] HOU Changming;ZHANG Shuo;CHEN Xiao;YANG Zhifeng;ZHANG Yongxing(Foshan Power Supply Bureau of Guangdong Power Grid Co.,Ltd.,Foshan 528010,China;School of Civil Engineering,Nanjing Forestry University,Nanjing 210037,China)

机构地区：[1]广东电网有限责任公司佛山供电局,广东佛山528010 [2]南京林业大学土木工程学院,江苏南京210037

出　　处：《混凝土与水泥制品》2024年第11期65-69,共5页China Concrete and Cement Products

基　　金：江苏省自然科学基金资助项目(BK20211281);广东电网有限责任公司基建技术创新专题项目。

摘　　要：设计了1组钢筋混凝土梁构件(RC)和3组应变硬化水泥基复合材料增强钢筋混凝土梁构件(U-10、U-30、U-50),研究了应变硬化水泥基复合材料层厚度(0、10、30、50 mm)对构件受弯性能的影响。结果表明:与RC构件相比,U-10、U-30和U-50构件的承载能力分别提高了16.5%、34.8%和61.0%;在加载过程中,纵向钢筋先屈服,然后应变硬化水泥基复合材料增强层开始承担荷载,且增强层表面出现众多细小裂缝,此后,部分细小裂缝局部化,增强层韧性逐渐丧失,承载能力下降,并最终保持与钢筋混凝土基梁一致。One set of reinforced concrete beam components(RC)and three sets of strain hardened cementitious composite material strengthening reinforced concrete beam components(U-10,U-30,U-50)were designed,and the effects of strain hardened cementitious composite material layer thickness(0,10,30,50 mm)on the bending performance of components were investigated.The results show that compared with RC components,the bearing capacity of U-10,U-30,and U-50 components are increased by 16.5%,34.8%,and 61.0%,respectively.During the loading process,the longitudinal steel bars yield first,and then the strain hardened cementitious composite reinforcement layer begins to bear the load,and numerous small cracks appear on the surface of the reinforcement layer.Afterwards,some of the small cracks localize,and the toughness of the reinforcement layer gradually decreases,resulting in a decrease in bearing capacity and ultimately maintaining consistency with the reinforced concrete foundation beam.

关 键 词：应变硬化水泥基复合材料 钢筋混凝土构件 受弯性能 破坏形态 承载能力 

分 类 号：TU375.1[建筑科学—结构工程]