摘要
为了研究圆柱在不同的FRP种类和层数下的破坏特征和力学性能,进行21根FRP约束加固钢筋混凝土圆柱,其中9根BFRP、9根CFRP包裹和3根钢筋混凝土圆形截面短柱的轴心抗压试验,对横向应变、柱截面的应变和极限承载力等进行了分析。研究结果表明:两种纤维布加固后的钢筋混凝土短柱的承载力有明显提高,CFRP的承载力比BFRP的高,但差别不大;同时延性也有不同程度的提高;CFRP布的应变比BFRP布的大;包裹层数越多加固效果越好。采用纤维布约束加固钢筋混凝土柱后力学性能有明显改善。
In order to study the failure characteristics and mechanical properties of reinforced concrete columns with different FRP types and layers,a comparative axial compression test on reinforced concrete columns,including 21 circular reinforced concrete columns in which 9 columns are constrained with BFRP and 9 columns with CFRP,3 others are not wrapped,was conducted.In the test,the lateral strains,longitudinal strains and maximum bearing capacities of the columns were analyzed.The test results show that the bearing capacities of the concrete columns reinforced with two kinds of fiber sheets are improved significantly,the bearing capacity of columns with CFRP is higher than that with BFRP although their difference is small.At the same time,the ductility increases with the strain of columns with CFRP is larger than that with BFRP.The reinforcement effect of the columns with more layers is better than that with less layers.The study concludes that the mechanical properties of the concrete columns reinforced with fiber cloth are enhanced significantly.
出处
《辽宁工程技术大学学报（自然科学版）》
CAS
北大核心
2011年第2期233-236,共4页
Journal of Liaoning Technical University (Natural Science)
基金
辽宁省自然科学基金资助项目(2051207
20092044)
关键词
BFRP
钢筋混凝土圆柱
轴心抗压试验
延性
承载力
BFRP
reinforced concrete column
axial compression test
ductility
bearing capacity
