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利用有限元软件ANSYS对方钢管再生混凝土短柱中心局部受压承载性能进行非线性分析,探讨了截面含钢率、再生骨料取代率等因素对其性能的影响。研究结果表明,有限元计算结果与试验结果吻合较好,所建立的有限元模型可较好地满足对方钢管再生混凝土短柱进行局压承载力模拟分析的要求;方钢管再生混凝土短柱局压受力特性与方钢管普通混凝土相似,局压承载力随着含钢率的增大而提高,且提高幅度呈非线性增长,含钢率为0.12时的局压承载力相对于含钢率为0.08时有较大幅度的提高;局压承载力与再生混凝土抗压强度基本呈线性关系,其比值控制在4.5左右。实际工程中需以再生混凝土实测强度为标准,进行方钢管再生混凝土构件局压承载力的验算。
The finite element software ANSYS was used to conduct nonlinear analysis on the local compressive load carrying capacity of concrete filled steel tubular short columns. The effects of factors such as the steel content in the section and the replacement ratio of recycled aggregates on the properties were discussed. The results show that the finite element method is in good agreement with the experimental results, and the finite element model can meet the requirements of the simulation analysis for the partial bearing capacity of recycled concrete short columns. The mechanical properties are similar to that of plain concrete, the bearing capacity of bearing increases with the increase of steel content, and the increase rate increases non-linearly. The bearing capacity of bearing with 0.12 steel ratio is 0.08; and the compressive strength of reclaimed concrete is basically linear, and its ratio is controlled at about 4.5. In actual engineering, the actual strength of recycled concrete needs to be taken as the standard to check the bearing capacity of reclaimed concrete members.