作　　者： (占亚翔）; (蒋隆敏）; (唐从青）; (吴城林）;

机构地区： 湖南工业大学土木工程学院,湖南株洲412007

出　　处： 《湖南工业大学学报》 2017年第1期30-34,40,共6页

摘　　要： 运用ANSYS有限元分析软件制作3个相同的钢筋混凝土框架节点模型,在控制竖向轴压力的条件下,当轴压比分别为0.3,0.5,0.7时,对其进行低周反复加载,研究框架节点的抗震性能,包括裂缝开展情况、延性、耗能能力等的变化规律。研究结果表明:在一定程度内,随着框架柱端轴压力的增加,框架节点核心区混凝土的约束作用逐步增强,节点核心区的剪切变形被有效地限制,而抗剪承载力、耗能能力得到了一定的提高。 Three identical reinforced concrete frame node models have been made by utilizing ANSYS finite element analysis software.A reversed low cycle loading has been made on the seismic capacity of frame nodes,under the control of vertical shaft pressure,with its axial compression ratios being0.3,0.5,0.7.A research has thus been conducted on the seismic capacity of frame nodes,as well as the change regulation of crack development,ductility,and energy dissipation capacity.The results show that,to a certain extent,with the increase of frame column end shaft pressure,the restraint effect of concrete in the core area of frame nodes gradually increases,the shear deformation in the core region of the frame nodes is effectively limited,and the shear bearing capacity and energy dissipation ability is improved to some degree.

关 键 词： 框架节点 轴压比 抗震性能