【摘要】 为了研究条带式FRP约束加固混凝土方柱的轴心受压承载性能和工作机理,对3组(12个)FRP约束混凝土方柱试件进行了试验研究和受力机理分析,基于极限平衡法推导出了FRP约束混凝土方柱的承载力计算模型,计算结果与试验值基本一致。揭示了FRP约束混凝土方柱的工作机理,约束区域分为强约束区和弱约束区,借助试验结果和FRP约束刚度回归出了强约束区混凝土的极限抗压强度计算公式,考虑FRP种类、条带间距和宽度给出了FRP约束方柱的极限承载力计算方法。更多还原

【Abstract】 Experimental research on three groups(twelve specimens) square concrete columns confined with FRP was conducted,and stress mechanism was analyzed in order to investigate axial compressive performance and working mechanism of the columns confined with striped FRP.Bearing capacity calculation model of the columns was deduced based on limit equilibrium method,and it is shown that the calculation results accord well with the experimental values.This reveals the working principle of square concrete columns confined with FRP.Constraint areas include strong and weak constrained zones.Ultimate compressive strength calculation formula of concrete the strong confined zones was regressed from experimental results and FRP restraining stiffness.And ultimate bearing capacity calculation method of square concrete columns confined with FRP was presented considering the width and spacing of FRP,in addition,kinds of it.更多还原