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对于型钢混凝土柱,考虑型钢和箍筋对混凝土的约束作用,将混凝土截面分成无约束混凝土部分、部分约束混凝土部分和强约束混凝土部分。基于附加约束应力作用效应的原理,构建了统一考虑混凝土约束效应影响的本构方程,建立了适用于型钢混凝土构件的数值分析模型。利用ABAQUS有限元软件,考虑混凝土不同约束效应及型钢与混凝土间的组合效应,对型钢混凝土柱进行数值模拟分析,通过模拟结果与试验结果对比,验证了该方法的合理性和正确性。最后采用该方法研究了轴压比、剪跨比和箍筋配置等参数对型钢混凝土柱的抗震性能的影响。
For steel reinforced concrete columns, considering the confinement effect of steel and stirrups on concrete, the concrete section is divided into unconstrained concrete sections and partly confined concrete sections and strongly confined concrete sections. Based on the principle of additional constrained stress effect, a constitutive equation considering the influence of concrete confinement effect is constructed and a numerical analysis model suitable for steel reinforced concrete member is established. The finite element analysis software ABAQUS is used to analyze the effect of different restraining effect of concrete and the combination effect between steel and concrete. Numerical simulations of SRC columns are carried out. The simulation results and the experimental results show that the method is reasonable and correct. Finally, this method is used to study the influence of axial compression ratio, shear span ratio and stirrup configuration on the seismic performance of SRC columns.