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为了考察材料本构模型参数对构件滞回性能模拟的影响,利用通用有限元软件ABAQUS对H形截面钢构件绕强轴压弯的滞回特性进行了数值模拟研究,对比分析了Ramberg-Osgood模型应变硬化指数和两折线模型强化率的参数取值对低周往复荷载作用下构件的极限抗弯承载力、极限后性能模拟结果的影响。分析表明,在所研究的材料强化参数变化范围内,构件极限抗弯承载力的相应变化是有限的;但构件的残余位移、耗能能力等大范围塑性变形阶段的模拟结果对两类材料模型强化参数均表现出很强的敏感性。基于以上分析结果,建议在对构件性能进行全过程数值模拟时应当谨慎地选用材料强化参数,并在必要时补充相应的材料性能试验。
In order to investigate the effect of the material constitutive model parameters on the hysteretic behavior of the component, the numerical simulation of the hysteretic behavior of the H-section steel component bending around the strong axis was performed by the general finite element software ABAQUS. The Ramberg-Osgood model The influence of the parameters of strain hardening index and strengthening rate of two-fold model on the ultimate flexural capacity and ultimate performance of the component subjected to low cyclic reciprocating loads are investigated. The analysis shows that the corresponding change of the ultimate flexural capacity of the members is limited within the range of material strengthening parameters studied. However, the simulation results of the plastic deformation stages such as the residual displacement and the energy dissipation capacity of the two kinds of material models Enhanced parameters showed a strong sensitivity. Based on the above analysis results, it is suggested that material strengthening parameters should be carefully selected during the whole process numerical simulation of component performance, and the corresponding material performance tests should be supplemented if necessary.