摘要
工程实践中,结构构件的加固多在现场进行,构件在加固时并不能卸载,这就使得已有研究与工程实践存在一定差距。因此用不同轴压比的预压试件模拟结构构件,对这些试件分别采用三种纤维片材约束,再进行轴压性能试验最后整理试验数据并得出了试件的应力—应变曲线。试验后对三种纤维片材的加固效果进行了对比,同时还对试验结果进行了分析。分析发现,FRP约束预压混凝土试件的峰值应力与峰值应变较未约束试件均有了明显提高,与此同时,二次加载过程中试件的变形能力也有了很大增强。
Actual reinforcement of structural member is often developed on site, and the members can not be unloaded, so there is a certain gap between the research result and engineering practice. Therefore, this paper used preloaded specimen to simulate structural members, which were wrapped with 3 kinds of fiber sheet, then the specimens were tested, at last we disposed the data and drew the stress-strain curves of the specimens. After the test, this paper compared the reinforcing effect of three fibers, at the same time made analysis of the data. It can be found that ： compared with specimen not confined, the peak stress and strain of FRP confined preloaded concrete specimen has been improved significantly, at the same time, the deformability has been improved also as under second loading.
出处
《地下空间与工程学报》
CSCD
北大核心
2013年第5期1035-1039,共5页
Chinese Journal of Underground Space and Engineering
基金
唐山市科技局项目(08450204B)
关键词
纤维增强复合材料
预压
混凝土方柱
约束
试验研究
FRP
preloading
square-shaped concrete column
confinement
experimental research
