【摘要】 本文在计算模型中考虑了钢筋混凝土结构的低周疲劳性能,建立了一种以退化刚度比作为破坏参数的地震破坏评估模型,此模型不仅能够反映大变形破坏,而且也能反映累积损伤效应。在此基础上,文中还研究了强震持时对钢筋混凝土结构累积破坏的影响。结果表明:对于中强长持时地震,低周疲劳效应十分明显地增大了结构的破坏程度,而且强震动持时对结构的累积破坏与结构的非线性变形的低周疲劳效应关系密切。更多还原

【Abstract】 In this paper,by considering the characterristics of low cycle fatigue of RC structures,an estimation model of earthquake damage with the damage parameter of the degradation stiffness ratio is pro posed, which reflects not only the damage of large deformation, but also the effects of accumulated damage. Futhermore, using this estimation model, the influence of strong motion duration on accumulated seismic destruction to RC structures is studied in this paper . The anlysis results indicate that for long duration of moderate strongmotion, low cycle fatigue effect increases the damage degree significantly,while the effect of strong motion duration on the accumulated structural; damage is closely associated with the non-linear deformation and the low cycle fatigue of structures.更多还原