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部分预应力CFRP筋混凝土梁疲劳性能研究

, PP. 43-48

Keywords: 桥梁工程,CFRP筋混凝土梁,试验研究,疲劳性能,全过程分析

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Abstract:

?通过4根梁的300万次高周疲劳试验,对疲劳荷载下部分预应力碳纤维增强塑料(CFRP)筋混凝土梁的受力过程、破坏模式及荷载-挠度特性等进行了研究。在综合考虑疲劳残余应变、疲劳弹性模量退化及疲劳强度退化等的基础上,基于ANSYS二次开发实现了部分预应力CFRP筋混凝土梁的疲劳全过程分析。结果表明:部分预应力CFRP筋混凝土梁具有良好的疲劳性能,非预应力筋的应力幅对预应力CFRP筋混凝土梁的疲劳性能起控制作用,且软件计算值与试验结果吻合良好。

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