摘要
通过开展碳纤维布(CFRP)加固部分预应力梁的抗弯实验,系统研究了CFRP对部分预应力混凝土梁的加固效应。制作了7根CFRP加固部分预应力梁,其中一根为对比未加固梁,另外六根为CFRP加固梁。试验考虑了初始裂缝宽度和CFRP层数的影响,分析了CFRP对混凝土梁的极限承载力、挠度和破坏形态的影响,体现了CFRP的阻裂增强效应。试验结果表明,粘贴CFRP可有效减小同荷载下的挠度,抑制试件的裂缝发展,提高预应力梁的抗弯承载力。
The flexural experiments of 7 partially-prestressed beams were conducted, and the ultimate bearing capacity, deflection and failure mode of the beams were analyzed. The beams include 1 non-reinforced contrasting sample and 6 reinforced with CFRP ones. The breadth of the initial damage and the number of layer of CFRP were considered. The experimental results showed that the ultimate bearing capacity of the beams with CFRP increased clearly and the crack expanded more slowly than the contrasting beam. This explained that CFRP could reinforce the capability of the partially-prestressed concrete beams.
出处
《玻璃钢／复合材料》
CAS
CSCD
2009年第1期73-76,67,共5页
Fiber Reinforced Plastics/Composites
基金
江西省自然科学基金(0450033)
关键词
CFRP
部分预应力梁
初始损伤
弯曲性能
CFRP
partially-prestressed beam
initial damage
flexural behavior
