目前FRP约束混凝土轴压应力,应变关系大都只考虑FRP管环向受拉。针对FRP管约束混凝土的轴心受压性能进行分析,考虑其承受压力造成约束模量降低的影响,在现有约束混凝土模型的基础上,提出一种考虑FRP管在双向受力情况下的应力,应变关系分析模型,并与试验结果进行了分析对比,分析结果与试验结果吻合较好。还依据这一模型进行了参数研究。
Most stress-strain models of FRP-confined concrete under uniaxial loading only consider FRP in tension in the hoop direction. This paper presents a model which takes into account the reduction in confinement modulus of FRP tube under combined axial compression and lateral tension. The results of this model agree well with test results. A parametric study is presented based on the model in this paper.