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为研究T形钢管再生混凝土柱在不同影响因素下的滞回性能,以再生骨料取代率为变化参数,进行了3根试件的有限元模拟分析。基于已建立的模型,进行了轴压比、含钢率及钢材强度为参数的有限元分析。根据模拟得到滞回曲线和骨架曲线,分析了设计参数对位移延性系数、承载力、刚度和耗能能力等抗震指标的影响。研究结果表明,T形钢管再生混凝土柱的滞回曲线较为饱满,从梭形逐步发展到弓形;随着再生骨料取代率的增大,柱的极限承载力和塑性变形能力有所下降,但影响较小;随着轴压比的提高,柱的极限承载力减小,延性变差;随着含钢率的增高,柱的水平承载力和变形能力提高;钢材强度的提高对柱的抗震能力起到有益作用;基于结构滞回性能指标的要求,T形钢管再生混凝土柱可用于实际工程的需要。
In order to study the hysteretic behavior of T-shaped steel tube recycled concrete columns under different influence factors, the finite element simulation analysis of three specimens was carried out with the replacement rate of recycled aggregate as a parameter. Based on the established model, the finite element analysis of axial compression ratio, steel ratio and steel strength were carried out. According to the hysteresis curve and the skeleton curve obtained from the simulation, the influence of design parameters on the seismic indexes such as displacement ductility coefficient, bearing capacity, stiffness and energy dissipation capacity is analyzed. The results show that the hysteretic curve of T-shaped steel tube recycled concrete column is relatively full, gradually changing from spindle shape to bow shape. With the increase of recycled aggregate replacement rate, the ultimate bearing capacity and plastic deformation capacity of the column decrease, With the increase of axial compression ratio, the ultimate bearing capacity of the column decreases and the ductility deteriorates. As the steel content increases, the horizontal bearing capacity and deformation capacity of the column increase; the strength of the steel increases the resistance of the column Ability to play a beneficial role; based on structural hysteretic performance requirements, T-shaped steel tube recycled concrete columns can be used for practical engineering needs.