无腹筋BFRP筋玄武岩纤维混凝土深梁抗剪性能试验研究  

EXPERIMENTAL STUDY ON SHEAR RESISTANCE OF BFRP REBAR BASALT FIBER REINFORCED CONCRETE DEEP BEAMS WITHOUT STIRRUPS

作　　者：张志金[1] 刘华新[1] 李庆文 王学志[1] ZHANG Zhi-jin;LIU Hua-xin;LI Qing-wen;WANG Xue-zhi(School of Civil Engineering and Architecture,Liaoning University of Technology,Jinzhou 121001,China)

机构地区：[1]辽宁工业大学土木建筑工程学院,锦州121001

出　　处：《玻璃钢／复合材料》2018年第9期36-40,共5页Fiber Reinforced Plastics/Composites

基　　金：辽宁省自然科学基金(2015020208)

摘　　要：为研究玄武岩纤维对无腹筋BFRP筋混凝土深梁裂缝开展、破坏形态、跨中挠度、剪切开裂承载力及抗剪极限承载力的影响,以玄武岩纤维体积掺率和纤维长度为参数,设计并制作了5根试验梁,通过四分点集中力加载研究深梁的抗剪性能。结果表明:随着纤维特征参数的增大,构件破坏形态出现由斜压破坏向剪压破坏转变的趋势;与普通混凝土深梁相比,相同荷载作用下,玄武岩纤维混凝土深梁跨中挠度和裂缝宽度均随着纤维特征参数的增大而减小;构件剪切开裂承载力和抗剪极限承载力随着纤维特征参数的增大均有所提高。在考虑玄武岩纤维增强作用的基础上,参照GB 50010—2015规范对玄武岩纤维混凝土深梁抗剪极限承载力进行计算,实测值与计算值基本吻合。For studying the influence of basalt fiber on crack development,failure mode,mid-span deflection,diagonal cracking strength and ultimate shear strength of basalt fiber reinforced polymer(BFRP)reinforced concrete deep beams without stirrups,5 test beams were designed and prepared with the parameters of volume ratio and length of basalt fiber,and the four points concentrated force load tests were carried out.The results showed that with the increase of fiber characteristic parameters,the diagonal compression failure transforms to shear compression failure.In contrast with the common concrete beam,the mid-span deflection and crack width of the basalt fiber reinforced concrete deep beams decrease with the growing of fiber characteristic parameters,and the diagonal cracking strength and ultimate shear strength of specimens increase with the growing of fiber characteristic parameters.Based on taking account of the influence of basalt fiber,the ultimate shear capacity of the basalt fiber reinforced concrete deep beams was calculated with reference to the code of GB 50010-2015,and the experimental values basically coincide with the calculated values.

关 键 词：玄武岩纤维 BFRP筋 深梁 纤维特征参数 抗剪性能 

分 类 号：TB332[一般工业技术—材料科学与工程]