玄武岩纤维自密实高强混凝土梁抗剪承载力研究初探  

Preliminary Study on the Shear Capacity of Basalt Fiber Self-compacting HighStrength Concrete Beams

作　　者：卢国寒 Lu Guohan(College of Architectural Engineering,Heilongjiang University of Science and Technology,Harbin Heilongjiang 150022,China;Heilongjiang Engineering Quality Road and Bridge Detection Center Co.,Ltd.,Harbin Heilongjiang 150080,China)

机构地区：[1]黑龙江科技大学建筑工程学院,黑龙江哈尔滨150022 [2]黑龙江省工程质量道桥检测中心有限公司,黑龙江哈尔滨150080

出　　处：《城市建筑》2020年第28期171-174,191,共5页Urbanism and Architecture

摘　　要：文章叙述了玄武岩纤维混凝土梁抗剪性能的现有研究基础,设计并进行了以纤维体积率和纤维长度为变量的7根玄武岩纤维自密实高强混凝土梁抗剪性能试验,从梁的破坏形态和裂缝分布、荷载-跨中挠度曲线、斜截面抗剪承载力三个方面分析了玄武岩纤维高强自密实混凝土梁的抗剪性能。建立了玄武岩纤维自密实高强混凝土梁斜截面抗剪承载力的简化计算公式,应用公式对玄武岩纤维自密实高强混凝土梁斜截面抗剪承载力进行计算,分析了玄武岩纤维自密实高强混凝土梁基于极限荷载后的名义平均等效抗剪强度的剪切延性。The paper describes the existing research foundation of the basalt fibre concrete beam shear performance,designs and carries out seven kind of basalt fibre self-compacting high-strength concrete beam shear performance tests with the fibre volume ratio and fibre length as variables.Then the shear resistance of basalt fibre high-strength self-compacting concrete beams is analysed from three aspects of beam damage form and crack distribution,load-span mid-deflection curve,and shear capacity of inclined section.A simplified formula for calculating the shear capacity of diagonal sections of basalt fibre self-compacting high-strength concrete beams is established.The formula is used to calculate the shearing capacity of diagonal sections of basalt fibre self-compacting high-strength concrete beams.Based on the nominal average equivalent shear strength,the shear ductility of basalt fibre self-compacting high-strength concrete beams is analysed.

关 键 词：玄武岩纤维 自密实高强混凝土梁 抗剪承载力 名义平均等效抗剪强度 剪切延性 

分 类 号：TU377[建筑科学—结构工程]