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为研究再生混凝土柱的受力性能,进行了系列足尺再生混凝土柱偏压性能试验。在4根足尺再生混凝土柱和2根足尺普通混凝土柱的偏压性能试验基础上,利用ABAQUS软件进行了非线性有限元分析,通过与试验结果对比验证了有限元模型的适用性,并深化研究了再生混凝土强度、配筋率、配箍率设计参数及受压偏心率对试件偏压性能的影响。结果表明:随着再生混凝土强度的提高,试件的刚度、承载力均相应提高;随着配筋率的提高,试件的承载力有明显提高;随着配箍率的提高,试件延性提高,承载力变化不明显;偏心率对试件受力性能影响相对较大,随着偏心率的增大,试件承载力降低、延性提高。
In order to study the mechanical behavior of recycled concrete columns, a series of full-scale recycled concrete columns were tested. On the basis of the biasing performance tests of 4 full-size recycled concrete columns and 2 full-size ordinary concrete columns, the nonlinear finite element analysis was carried out by ABAQUS software. The applicability of the finite element model was verified by comparison with the experimental results. The effect of recycled concrete strength, reinforcement ratio, design parameters of stirrup ratio and eccentricity of compression on the biasing performance of the specimens was further studied. The results show that with the increase of the strength of recycled concrete, the stiffness and bearing capacity of the specimens increase correspondingly. With the increase of the reinforcement ratio, the bearing capacity of the specimens increases obviously. With the increase of the stirrup rate, the ductility But the change of bearing capacity is insignificant. The eccentricity has a relatively large influence on the mechanical properties of the specimens. With the increase of the eccentricity, the bearing capacity of the specimens decreases and the ductility increases.