层内混杂FRP加固混凝土柱恢复力模型研究

为了给混杂FRP加固混凝土结构的弹塑性分析和加固设计提供计算模型,根据层内混杂FRP加固混凝土柱抗震性能的试验结果,以退化三线形模型为基础,通过回归分析,考虑了轴压比、体积配箍率和体积含纤率的影响,提出了混杂FRP加固混凝土柱的骨架曲线特征点参数确定公式和滞回曲线退化刚度确定公式.结果表明,所建立的恢复力模型骨架曲线和滞回曲线与试验值比较吻合.

Research on Resilience Models of Hybrid FRP Reinforced Concrete Columns

In order to provide a calculating model for the plastic analysis and the reinforcement design of hybrid FRP reinforced concrete structure,based on the test results of the seismic performance of the hybrid FRP reinforced concrete columns,selecting the commonly used degenerate three linear resilience model,the formulas to decide the characteristic points of the skeleton curves and the unloading stiffness of the hysteresis curves were suggested by regression analysis which considered the effect of the axial load ratio,the volume stirrup ratio and the volume fiber ratio.The result showed that the calculate results of the skeleton curves and the hysteresis curves tallied well with those of the experiment.