考虑梁柱节点模型的钢筋混凝土框架地震易损性研究

发布时间：2018-08-19 20:41

【摘要】：钢筋混凝土框架结构的梁柱节点对结构抗震力学性能具有显著的影响。基于刚性节点假定和宏观柔性模型的节点模拟方式,一直缺乏有关其适用范围的研究。地震易损性分析方法的引入,能够从概率意义上定量地刻画这两种节点模型对钢筋混凝土框架结构抗震力学性能的影响,获得的结论可望为钢筋混凝土框架结构梁柱节点的处理提供理论的依据与支撑。因此,该文基于Open Sees平台,考虑地震动输入的随机性,通过采用双频率段控制选波方法,并采用增量动力分析理论,定义4个不同的抗震性能水准,对三榀不同层数的钢筋混凝土框架结构分别采用刚性节点假定和宏观柔性模型进行了地震易损性研究。获得的结论表明:基于我国抗震规范设计的钢筋混凝土框架结构,在多遇地震作用下,采用刚性节点假定对结构进行抗震性能评估是合理的,否则需要考虑梁柱节点变形对整个框架结构抗震性能的影响。
[Abstract]:The Liang Zhu joints of reinforced concrete frame structure have a significant effect on the seismic behavior of the structure. Based on rigid node assumption and macroscopic flexible model, there has been a lack of research on its applicability. The introduction of seismic vulnerability analysis method can quantitatively describe the influence of these two joint models on the seismic behavior of reinforced concrete frame structures in the sense of probability. The conclusions obtained are expected to provide theoretical basis and support for the treatment of Liang Zhu joints of reinforced concrete frame structures. Therefore, based on Open Sees platform, considering the randomness of ground motion input, this paper defines four different seismic performance levels by adopting dual frequency band control wave selection method and incremental dynamic analysis theory. The seismic vulnerability of three reinforced concrete frame structures with different layers is studied by using rigid node assumption and macroscopic flexible model respectively. The conclusions obtained show that it is reasonable to evaluate the seismic behavior of reinforced concrete frame structures based on the seismic code of our country. Otherwise, the effect of Liang Zhu joint deformation on the seismic behavior of the whole frame structure should be considered.
【作者单位】：同济大学土木工程学院;重庆科技学院建筑工程学院;
【基金】：国家自然科学基金青年基金项目(51408092) 重庆市科技计划项目(catc2014jcyj A30004)
【分类号】：TU375.4

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