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本文基于弹塑性铰概念提出了一种按杆系进行钢框架弹塑性静力和动力反应计算的非线性分析模型。该模型能考虑Bauschinger效应、应变强化效应和强度退化效应的影响,且能描述钢杆件在任意状态下真实弹塑性刚度的连续性变化过程。免除了双分量模型的计算刚度在杆件的不同状态下发生突变的缺陷,大大简化了钢框架弹塑性静力和动力分析计算。试验分析表明,本文的分析模型是可靠的,且具有较高的仿真精度。
Based on the concept of elastic-plastic hinge, this paper proposes a nonlinear analysis model for the elasto-plastic static and dynamic response of steel frames according to the rod system. The model can take into account the effects of the Bauschinger effect, the strain hardening effect, and the strength degradation effect, and can describe the continuous change process of the real elasto-plastic stiffness of a steel member in any state. The defect that the calculated stiffness of the double-component model is abruptly changed in different states of the bar is eliminated, and the elasto-plastic static and dynamic analysis and calculation of the steel frame are greatly simplified. Experimental analysis shows that the analytical model of this paper is reliable and has high simulation accuracy.