纵筋焊接锚固型钢纤维高强混凝土牛腿受剪性能试验研究  

Shear behavior of high strength concrete corbel with longitudinal reinforcement of welded anchorage

作　　者：李树山[1] 王晖[1] 张锋剑[2] 张召辉 黄凤达 贾明晓[1] LI Shushan;WANG Hui;ZHANG Fengjian;ZHANG Zhaohui;HUANG Fengda;JIA Mingxiao(North China University of Water Resource and Electric Power,Zhengzhou 450045,China;Henan University of Urban Construction,Pingdingshan 467036,China;Guizhou Transportation Planning Survey and Design Academe Co.,Ltd.,Guiyang 550001,China)

机构地区：[1]华北水利水电大学,河南郑州450045 [2]河南城建学院,河南平顶山467036 [3]贵州省交通规划勘察设计研究院股份有限公司,贵州贵阳550001

出　　处：《混凝土》2018年第10期43-46,共4页Concrete

基　　金：国家自然科学基金(U1404526;51508190);河南省科技攻关(142102310536;162102410049);郑州市科技攻关(131PPTGG410-3)

摘　　要：牛腿构件受力纵筋采用焊接锚固形式,通过6个高强混凝土牛腿构件的受剪加载试验,研究高强混凝土牛腿的受力机理及破坏模式,分析剪跨比和钢纤维掺量对牛腿受剪性能的影响。结果表明:随着剪跨比的增大,牛腿开裂荷载和极限承载力显著降低;随着钢纤维掺量的增加,牛腿开裂荷载显著增加,裂缝宽度、极限承载力得到改善。The longitudinal rebars of the corbels are in the form of welded anchorage.Based on the shear loading test of 6 high-strength concrete corbel,the mechanism of stress and failure modes of high-strength concrete corbel are studied,and the influence of shear span ratio and steel fiber volume on the Shear behavior of corbel is analyzed.The result shows that the cracking load and the ultimate bearing capacity of corbel decrease as the increase of shear span ratio;With the the volume of steel fiber increases,the cracking load of the corbel increases significantly,the cracking width and ultimate bearing capacity have been improved.

关 键 词：钢纤维高强混凝土 牛腿 焊接锚固 受剪性能 开裂荷载 极限承载力 

分 类 号：TU528.572[建筑科学—建筑技术科学]