摘要
通过对3根使用不同预应力张拉方式张拉的C40钢筋混凝土梁进行受弯性能试验,重点研究了在早龄期分期张拉预应力和28 d张拉预应力作用下的试件梁在承载能力、刚度和挠度上的差异。试验结果表明,张拉龄期越早,试件的开裂荷载、屈服荷载越高,相同挠度下的承载力越强,刚度越大。张拉龄期对试件梁屈服后的承载能力和挠度的改善并不明显。
Through the experimental study on bending behavior of 3 C40 concrete beams with different methods of prestressed tension,the differences of prestressed tension at the early age and 28 d is investigated. And mainly analyze the carrying capacity,stiffness and deflection of concrete beams. The result shows that at the earlier tension age,the cracking load and yield load are higher,the carrying capacity and stiffness are stronger under the same load. The tension age does not have an obvious improvement on the carrying capacity and deflection after the yielding.
出处
《四川建筑科学研究》
北大核心
2016年第3期32-36,共5页
Sichuan Building Science
关键词
预应力混凝土梁
早龄期分期张拉
受弯性能
循环荷载
prestressed beams
early age installment tension
bending behavior
cyclic loadings
