剪跨比对活性粉末混凝土梁抗剪性能的影响  

Different Shear Span Ratio on the Shear Performance of Reactive Powder Concrete Beam

作　　者：金凌志[1] 张辉[1] 高一鸣[1] JIN Ling - zhi ZHANG Hui GAO Yi - ming(Guangxi Laboratory of Geomechanics and Geotechnical Engineering, Guilin University of Technology, Guilin Guangxi 541004, China)

机构地区：[1]桂林理工大学广西岩土力学与工程重点实验室,广西桂林541004

出　　处：《淮阴工学院学报》2016年第5期24-27,共4页Journal of Huaiyin Institute of Technology

基　　金：国家自然科学基金项目(51368013);广西重点实验基金项目(2015-A-02)

摘　　要：通过4根活性粉末混凝土(RPC)梁构件的受剪试验,研究活性粉末混凝土在不同剪跨比条件下的破坏形态及剪切延性的影响规律。试验结果表明:高强钢筋RPC梁的剪切延性系数平均值达到0.892。随着剪跨比的增大而增强,但增幅差异较大,其根本原因是剪跨比影响梁的剪力传递方式,剪力传递方式又决定了其剪切延性,当剪跨比适中时,梁构件发生剪压破坏,其延性相对较好。Based on the shear test results of four pillars of reactive powder concrete beams,the effects on failure modes and the shear ductility of the reactive power concrete under different shear span ratio were investigated.Test results indicate that the average value of shear ductility factor of high- strength concrete RPC beams can reach 0. 892. With the increase of shear span ratio and shear ductility factor enhances,the rate of increase will be a large difference. The essential cause of the vast difference is that shear span ratio affects shear transfer mode of beams which determines the shear ductility. When shear span ratio is moderate,the ductility of beams with shear- compression failure is relatively well.

关 键 词：活性粉末混凝土梁 剪跨比 承载力 剪切延性 

分 类 号：TU375.1[建筑科学—结构工程]