摘要
为研究玄武岩纤维布加固钢筋混凝土梁受弯极限承载力,试验设计浇筑4片钢筋混凝土T形梁,为了对比试验,对其中2片梁进行单调静力加载至梁体开裂,对4片梁进行玄武岩纤维布加固。通过试验研究对比分析了预加固梁和加固已有损伤梁在开裂荷载、极限荷载、挠度、钢筋、混凝土及纤维布应变、裂缝开展情况等结果,并进行了理论分析和有限元模拟。结果表明加固后梁体受弯极限承载力得到明显提高,加固前进行转角处的圆角处理使纤维布工作效果得到改善,减少了应力集中现象。
In order to study the ultimate flexural capacity of reinforced concrete beams with BFRP （ Basalt fiber reinforced polymer）, the test is designed and poured 4 T-section reinforced concrete beams. At first, monotonous static loading is carried on 2 of the beams until the chinks appeared. Afterwards, all beams strengthened by BFRP sheets. The contrast experiment studied and analyzed the different cracking load, ultimate load, deflection, reinforcement strain, concrete strain, fiber cloth strain and crack development of pre- reinforced beams and damaged beams strengthened by BFRP sheets. At the same time, the theoretical analysis and finite element simulation are taken to verify the result of experiment. The results show that the ultimate flexural capacity of reinforced concrete beams with BFRP has significantly increased. The circular bead treatment raises woke effect and reduces stress concentration of BFRP sheets.
出处
《结构工程师》
北大核心
2016年第1期139-146,共8页
Structural Engineers
基金
国家自然科学基金资助项目(51368018)
关键词
玄武岩纤维布
预加固
钢筋混凝土梁
受弯极限承载力
basalt fiber reinforced polymer, pre-reinforcement, t-section reinforced concrete beam, ultimateflexural capacity
