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。 Abstract: 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.

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张明涛,王泽萍,唐晗,等.纤维素醚对石膏基自流平砂浆性能的影响研究[J].混凝土与水泥制品,2024(11):70-74. ZHNAG M T,WANG Z P,TANG H,et al.Study of the effect of cellulose ether on the properties of gypsum-based self-leveling mortar[J].China Concrete and Cement Products,2024(11):70-74.