高强钢筋超高性能混凝土梁抗剪性能试验研究  

Experimental study on shear performance of reinforced ultra-high performance concrete beams

作　　者：胡利 李映春 黎平杰 程全 姜海波[2] HU Li;LI Yingchun;LI Pingjie;CHENG Quan;JIANG Haibo(Institute of Defense Engineering,AMS,PLA;Guangdong University of Technology,Guangzhou 510006,China)

机构地区：[1]中国人民解放军军事科学院国防工程研究院,北京100850 [2]广东工业大学,广东广州510006

出　　处：《混凝土与水泥制品》2025年第2期70-75,共6页China Concrete and Cement Products

摘　　要：对比研究了配置HRB600纵筋的UHPC梁构件和配置HRB400纵筋的C40混凝土梁构件的抗剪性能。结果表明:采用UHPC和HRB600高强钢筋相结合有效提升了混凝土梁的抗裂性能、抗剪承载力和变形性能,推迟了弯曲裂缝的出现;当剪跨比为1.0、1.5、2.0时,与配置HRB400纵筋的C40混凝土梁构件相比,配置HRB600纵筋的UHPC梁构件的极限承载力Pu分别提高了147%、122%、103%,Pu对应的跨中挠度δu分别提高了22.5%、83.2%、145.0%;配置HRB600纵筋的UHPC梁构件的斜截面抗剪承载力受多因素影响,需对此进行深入研究。A comparative study was conducted on the shear performance of UHPC beam components with HRB600 longitudinal steel bars and C40 concrete beam components with HRB400 longitudinal steel bars.The results show that the combination of UHPC and HRB600 high-strength steel bars effectively improves the crack resistance,shear bearing capacity,and deformation performance of concrete beams,and delays the occurrence of bending cracks.When the shear span ratio is 1.0,1.5,and 2.0,compared with the C40 concrete beam component with HRB400 longitudinal steel bars,the ultimate bearing capacity Pu of the UHPC beam component with HRB600 longitudinal steel bars is increased by 147%,122%,and 103%,respectively.The corresponding mid-span deflection δ_(u) of P_(u) is increased by 22.5%,83.2%,and 145.0%,respectively.The inclined section shear bearing capacity of UHPC beam components with HRB600 longitudinal steel bars is influenced by multiple factors and requires in-depth research.

关 键 词：超高性能混凝土(UHPC) 高强钢筋 抗剪性能 剪跨比 斜截面抗剪承载力 

分 类 号：TU375.1[建筑科学—结构工程]