- 李 強1,2，魏宏亮1,2，吳星蓉1,2，劉福江1,2
2022年第2期
摘要
引用本文
摘 ?要：為研究混凝土塑性損傷模型中黏性系數對鋼管混凝土軸壓短柱極限承載力的影響，采用有限元分析軟件ABAQUS，在合理選取材料模型的基礎上，驗證了模型的可靠性，并以黏性系數為主要參數，對不同截面形式的鋼管混凝土軸壓短柱極限承載力進行了計算和分析。結果表明：黏性系數對鋼管混凝土軸壓短柱荷載-變形關系曲線彈性階段剛度影響不大；隨著黏性系數取值的增大，柱構件的極限承載力也隨之增大；在給定黏性系數的條件下，采用不同加載位移計算得到的柱構件極限承載力值離散性較大。此外，綜合加載位移和黏性系數對承載力值和計算收斂性的影響，給出了適用于不同截面形式的鋼管混凝土軸壓短柱黏性系數的取值。
Abstract: ?In order to investigate the influence of viscosity parameter of concrete damaged plastic model on the ultimate bearing capacity of concrete filled steel tubular stub columns, the finite element analysis software ABAQUS was adopted. The reliability of the model was verified based on reasonable constitutive models of steel and core concrete. Viscosity parameter was taken as the main parameter, the ultimate bearing capacity of concrete-filled steel tubular stub columns under axial compression with different cross-sections was calculated and analyzed. The analysis result indicates that viscosity parameter has little effect on the elastic stiffness of the load-deformation curve of concrete-filled steel tubular stub columns; with the increasing viscosity parameter value, the ultimate bearing capacity of column members gradually rise; under the condition of given viscosity coefficient, the ultimate bearing capacity of column members calculated with different loading displacements has greater discreteness. Comprehensively considering the effect of viscosity parameter and load displacement on ultimate bearing capacity and convergence, the value of viscosity parameter applicable to the different cross-sections of concrete-filled steel tubular stub columns was put forward.?
李強,魏宏亮,吳星蓉,等.鋼管混凝土軸壓短柱數值模型黏性系數取值分析[J].混凝土與水泥制品,2022(2):41-46.
LI Q,WEI H L,WU X R,et al.Analysis on Viscosity Coefficient of Numerical Model of Concrete Filled Steel Tubular Short Columns Under Axial Compression[J].China Concrete and Cement Products,2022(2):41-46.
