玻璃纤维增强塑料筋的强度与断裂模式研究  

Research on Strength and Fracture Modes of GFRP Bars

作　　者：田伟 郑祖嘉[2] 

机构地区：[1]湖北乐忠信工程咨询有限公司,武汉430074 [2]武汉科技大学城市建设学院,武汉430065

出　　处：《建材世界》2015年第1期25-28,共4页The World of Building Materials

摘　　要：GFRP筋拉伸力学性能与破坏形态不同于常见的工程应用材料。利用烧失实验测得不同GFRP杆件中树脂的含量,通过对杆件的一次拉伸,观察不同树脂含量下杆件从受力到破坏的整个过程中的表观特征,并测得初裂荷载与破坏荷载。对比分析不同树脂含量的GFRP筋在受拉伸荷载作用下的初裂荷载以及破坏荷载表明:GFRP筋为脆性材料;不同树脂含量下杆件首先是以剪应力错动为主,而后转为树脂和纤维的共同断裂与剪应力错动综合而破坏;不同树脂含量下的GFRP筋随着树脂含量的增加呈先增大后减小的趋势;GFRP杆件的破坏强度较高,可以起到代替钢筋的作用。Fiber content of different GFRP bars were measured firstly, and primary tensile tests were conducted to observe apparent features of GFRP bars with different resin content. Different values of the first crack load and failure load under different tensile loads were compared and analyzed. Test results show that GFRP bar is brittle material The fracture modes of GFRP bars with different resin content are basically the same in different stages, the characteristic appears shear dislocation at first, and then combination breakup of resin--and---fiber. The first crack load and failure load of GFRP bars are different, and increase firstly with the fiber content increasing, and then decrease. With a high level of fracture strength, GFRP bars can replace reinforcement.

关 键 词：GFRP筋 破坏模式 拉伸试验 树脂含量 

分 类 号：TQ327[化学工程—合成树脂塑料工业]