T形钢管混凝土柱-混凝土梁外加强环板式节点抗震性能非线性分析

发布时间：2018-11-16 13:22

【摘要】：通过ABAQUS软件对15个T形钢管混凝土柱-混凝土梁外加强环板式节点抗震性能进行非线性分析。结果表明,节点模型均在核心区产生应力集中,不过参数的变化导致应力集中以及向四周扩散的程度有所差异。各节点模型的滞回曲线形状饱满,没有捏缩现象,滞回性能良好;位移延性系数均大于1.93,等效粘滞阻尼系数均大于0.180,能量耗散系数均大于1.134,这些抗震性能指标远远超过普通钢筋混凝土结构的要求,部分甚至超过型钢混凝土结构的要求。通过参数分析,了解节点抗震性能指标随参数的变化规律。框架梁配筋率增大不仅可以提高节点承载能力,而且对节点抗震性能提高也很有帮助;牛腿长度增大虽对节点承载力能力较为有利,但对抗震性能影响比较有限。
[Abstract]:The aseismic behavior of 15 T-shaped concrete-filled steel tubular column-concrete beams was analyzed by ABAQUS software. The results show that the node models all produce stress concentration in the core region, but the variation of the parameters leads to the difference of the stress concentration and the degree of diffusion to the surrounding area. The hysteretic curve of each node model has full shape and no pinch phenomenon, and the hysteretic performance is good. The displacement ductility coefficient is greater than 1.93, the equivalent viscous damping coefficient is more than 0.180, and the energy dissipation coefficient is more than 1.134. These seismic performance indexes far exceed the requirements of ordinary reinforced concrete structures. Some even exceed the requirements of SRC structures. Through parameter analysis, the variation law of seismic performance index with parameters is understood. The reinforcement ratio of frame beams can not only improve the bearing capacity of joints, but also improve the seismic performance of joints. Although the increase of corbel length is more favorable to the bearing capacity of joints, but the impact on seismic performance is relatively limited.
【作者单位】：武汉理工大学土木工程与建筑学院;
【基金】：黄鹤英才(城市建设)计划(20161j0013)
【分类号】：TU398.9

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