新型外箍式工字柱节点的抗震性能研究  

Study on seismic behavior of new type external hoop I-shaped column joints

作　　者：潘秀珍[1] 孙家妮 高欢 杨水成[2] 梁刚 Pan Xiuzhen;Sun Jia'ni;Gao Huan;Yang Shuicheng;Liang Gang(School of Civil Engineering and Architecture,Xi'an University of Technology,710048,Xi'an,China;School of Mechanical and Instrument Engineering,Xi'an University of Technology,710048,Xi'an,China)

机构地区：[1]西安理工大学土木建筑工程学院,西安710048 [2]西安理工大学机械与精密仪器工程学院,西安710048

出　　处：《应用力学学报》2021年第5期2084-2091,共8页Chinese Journal of Applied Mechanics

基　　金：国家自然科学基金面上项目(51978571);陕西省科技厅自然科学基础研究计划项目(2021JM-333,2020JQ-628)。

摘　　要：提出了一种用于RC框架-钢结构加层混合结构的新型外箍式节点,旨在减小新老结构之间的刚度突变,方便施工。采用ABAQUS有限元软件,首先进行模型的正确性验证,然后对上柱为工字型1/2缩尺新型外箍式节点试件进行了循环荷载作用下的抗震性能分析。结果表明:该新型节点的刚度退化较为平稳,滞回曲线展现出较好的承载能力、塑性变形与耗能能力;传力路径简捷可靠,塑性铰位于外箍钢板边缘处,"紧固结构"有效保护了节点核心区,有利于提高节点承载力和整体协作抗震能力。根据相关参数的研究结果提出了合理的设计建议,本项目的研究可以为轻钢增层混合结构的推广应用提供参考。A new type external hoop joint for RC frame-steel structure added layer hybrid structure is proposed,which aims to reduce the sudden change in stiffness between the new and old structures, and facilitate construction.The paper uses ABAQUS finite element software to analyze the seismic performance of the 1/2-scale new type joint specimen with an I-shaped upper column under cyclic loading, after verifying the correctness of the model.The results show that the stiffness degradation of this new type of joint is relatively stable, and the hysteresis curve shows good bearing capacity, plastic deformation and energy dissipation capacity. The force transmission path is simple and reliable, and the plastic hinge is located at the edge of the external hoop steel plate, which effectively protects the core area of the joint and is beneficial to improving the bearing capacity and the overall cooperative seismic resistance of the structure. The paper puts forward reasonable design suggestions based on the research results of related parameters. The research of this project can provide scientific basis and technical support for the popularization and application of light steel layered hybrid structure.

关 键 词：外箍式工字柱节点 RC框架-钢结构加层混合结构 滞回曲线 耗能能力 抗震性能 

分 类 号：TU391[建筑科学—结构工程]