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采用地震工程开源模拟软件OpenSees(Open System for Earthquake Engineering Simulation)对CFRP(Carbon Fiber Reinforced Polymer,碳纤维增强复合材料)布加固高强钢筋混凝土方柱的抗震性能进行了数值分析。采用Steel02Material和Concrete02Material材料本构模型模拟了CFRP布加固高强混凝土方柱的抗震性能;在此基础上,进一步研究了轴压比和剪跨比这2个因素对试件抗震性能的影响。将所得数值分析结果与相同条件下的试验结果对比后发现:基于Steel02 Material和Concrete02 Material材料本构,利用OpenSees,可以较好地模拟CFRP布加固高强混凝土方柱的抗震性能,并且与试验结果(滞回曲线、骨架曲线、水平承载力和位移延性系数)能够较好地吻合,从而说明该数值分析方法还可以准确地反映出轴压比和剪跨比对高强混凝土柱抗震性能的影响规律。
Seismic behavior of reinforced high-strength reinforced concrete columns reinforced with carbon fiber reinforced plastics (CFRP) sheets subjected to numerical simulation was analyzed using OpenSees (Open System for Earthquake Engineering Simulation). The constitutive model of Steel02Material and Concrete02Material was used to simulate the seismic performance of CFRP-reinforced square columns. On this basis, the influences of axial compression ratio and shear-span ratio on the seismic behavior of specimens were further studied. Comparing the numerical results with the experimental results under the same conditions, it is found that the seismic behavior of CFRP-reinforced high-strength concrete square column can be well simulated by using OpenSees based on the Steel02 Material and Concrete02 Material constitutive model, Hysteresis curve, skeleton curve, horizontal bearing capacity and displacement ductility coefficient) can be well fitted, which shows that the numerical analysis method can accurately reflect the influence of axial compression ratio and shear-span ratio on the seismic behavior of high-strength concrete columns.