摘要
通过5根连续梁的试验研究了碳纤维加固T形截面钢筋混凝土连续梁的受弯性能。研究结果表明, 在初始荷载小于极限承载力20%的情况下,可以忽略二次受力的影响。增加碳纤维粘贴层数对连续梁屈服荷 载影响较小,但极限承载力有一定提高。增加支座配筋率能有效提高支座及跨中的屈服荷载,但极限荷载并 无提高。采用改进后的“虚梁法”公式对屈服荷载和极限荷载进行分析,计算结果与试验荷载吻合较好。
Flexural behavior of five T-shape continuous reinforced concrete beams strengthened with carbon fiber reinforced polymer(CFRP)have been tested.The results show that the effect of secondary load can be neglected if initial load is less than 20% of ultimate capacity.More CFRP has little effect on the yielding load of beam,but it can enhance the ultimate load to a certain extent.The yielding load of support and mid-span section will augment as the reinforced ratio of support increases.The yielding load and ultimate load can be calculated by the revised method of “virtual beam”.The results are comparable to experimental loads.
出处
《建筑结构》
CSCD
北大核心
2005年第3期33-35,共3页
Building Structure
