碳纤维布加固玄武岩纤维复材筋工程用水泥基复合材料混凝土梁的受弯性能  

EXPERIMENTAL RESEARCH ON THE FLEXURAL BEHAVIOR OF FRP REINFORCED ECC-CONCRETE COMPOSITE BEAMS STRENGTHENED WITH CARBON FIBER SHEET

作　　者：葛文杰[1] 虞佳敏 高培琦 宋婉蓉 仇胜伟 陈秋兵 季隋栋 GE Wenjie;YU Jiamin;GAO Peiqi;SONG Wanrong;QIU Shengwei;CHEN Qiubing;JI Suidong(College of Civil Science and Engineering,Yangzhou University,Yangzhou 225127,China)

机构地区：[1]扬州大学建筑科学与工程学院,江苏扬州225127

出　　处：《工业建筑》2020年第2期163-168,共6页Industrial Construction

基　　金：国家自然科学基金资助项目(51678514,51308490);江苏省六大人才高峰项目(JZ-038,2016);中国博士后基金面上项目(2018M642335);江苏省住建厅建设系统科技项目(2018ZD047);扬州大学高端人才支持计划,扬州大学研究生科研创新计划项目(XKYCX19-085)。

摘　　要：设计制作了三组不同层数的碳纤维布(CFS)加固受弯构件,分别为玄武岩纤维复材(BFRP)筋混凝土梁、BFRP筋工程用水泥基复合材料(ECC)梁和BFRP筋ECC-混凝土复合梁,并对其进行受弯性能试验研究。研究了碳纤维布粘贴层数对加固试件极限荷载、破坏形态、裂缝和变形的影响。结果表明:相同荷载下,复合梁和ECC梁试件的变形和裂缝宽度均小于普通混凝土梁试件。在受弯构件受拉区配置ECC可有效提高构件抵抗变形和裂缝的能力。经粘贴碳纤维布加固后的试件的开裂荷载和极限荷载均大于未加固试件,粘贴一、二、三层CFS加固的复合梁极限荷载较未加固梁分别增加了12. 5%、16. 6%、19. 7%。粘贴CFS布可有效提高构件的承载力和抵抗变形、裂缝的能力。改善效果随CFS粘贴层数的增加而增大,但提升幅度逐渐减小。Three groups of flexural members strengthened with different layers of carbon fiber sheet(CFS) were designed and manufactured,and their static flexural test were carried out,one group is fiber remforce popupner(FRP) reinforced concrete beam,one group is FRP reinforced engineereed cementitious composite(ECC) beam,and one group is FRP reinforced ECC-concrete composite beam. The effects of the number of layers of CFS on the ultimate load,failure mode,crack and deformation of strengthened ECC-concrete composite beams were studied. The results showed that under the same load,the deformation and crack width of the composite specimens and ECC specimens were smaller than those of the concrete specimens. ECC layered in the tension zone of the flexural members could effectively improve the capatity to resist deformation and cracks. The cracking load and ultimate load of the specimens strengthened by the CFS were higher than those of unstrengthened specimens. The ultimate load of the composite beam strengthened by one,two and three layers CFS were 12. 5%,16. 6% and 19. 7%,respectively,higher than that of unstrengthened beam. CFS could effectively improve the bearing capacity and capacity to resist deformation and cracks. The improvement effect increasesd with the increasing of number of CFS layers,but the increasing rate gradually decreased.

关 键 词：碳纤维布 加固 FRP筋 复合梁 受弯性能 置换高度 

分 类 号：TU37[建筑科学—结构工程]