【摘要】 本文分别采用纤维单元模型和塑性铰单元模型对一个四层足尺钢框架振动台试验进行模拟分析,在三维空间非线性分析程序Perform-3D中进行动力非线性分析,比较分析结果,并与试验结果对比,以研究两种模型应用于钢框架整体结构非线性分析的计算精度。文中并讨论了纤维单元模型截面纤维的划分、塑性区长度的取值等问题。最后对采用组合梁的整体结构模型进行了动力非线性分析。结果表明,纤维模型的建模速度比塑性铰模型快,但塑性铰模型能模拟结构的倒塌时间。Perform-3D程序的纤维单元模型和塑性铰单元模型用于计算我国规范规定的7度和8度地震作用的多层钢框架结构,其结果是真实可靠的,而且计算结果偏于安全。更多还原

【Abstract】 In order to study the accuracy of nonlinear analysis of two macro models, this paper presents the dynamic nonlinear analysis with fiber models and plastic hinge models by a 3-dimensional nonlinear analysis software, named Perform-3D. Both models are based on the full-scale steel moment resisting frame shaking table test, which is carried out on E-Defense in Japan. Analysis results are compared with that of shaking table test. The number of fibers in element sections, the length of plastic zones and the energy dissipation are discussed. Finally, the dynamic nonlinear anlysis of structural models with composite beam components are carried out. It is shown that the fiber models can be built easier than plastic hinge models, but plastic hinge models can simulate collapse time of the structure, and both models in Perform-3D can be applied to inelastic analysis for multi-story steel frame structures under earthquake actions with intensities 7 and 8. The calculating results for the two models are reliable and safe.更多还原