左右梁位置偏移的外加强环式钢框架异型节点的试验研究及有限元分析

发布时间：2018-03-21 11:06

本文选题：钢框架异型节点　切入点：外加强环板　出处：《沈阳建筑大学》2014年硕士论文　论文类型：学位论文

【摘要】：现今,随着对建筑结构使用功能的要求越来越高,结构形式越来越复杂,梁柱异型节点已经越来越多地出现在大型工业建筑及民用建筑中。由于缺乏对左右梁位置偏移的外加强环式钢框架异型节点的试验和理论研究,目前在该领域的国家相关规范依然处于空白,也因此对其并没有可靠的设计依据,所以对该类框架异型节点进行分析研究具有重要的理论意义和实际价值。本文的主要研究内容为左右梁位置偏移的外加强环式钢框架梁柱异型节点的抗震性能。通过前期的设计计算,将模型设计为“强构件弱节点”的形式,异型节点的节点域被划分为中间节点域及对称的上节点域和下节点域三部分,利用有限元程序ABAQUS对梁柱异型节点的受力性能进行了非线性有限元分析,获得了低周往复荷载下异型节点的节点域的应力分布及发展规律,并对核心节点域及上节点域和下节点域的计算结果进行了分析比较。制作了相同尺寸的试验试件,对其进行了低周往复加载试验,分析研究了节点左右梁偏移高度、外加强环板的设置和柱的截面形式对异型节点抗震性能的影响,得到钢框架异型节点的承载能力、变形性能、滞回性能和破坏模态,同时与常规节点进行了比较。试验研究结果表明：该类梁柱异型节点的延性性能好,耗能能力强,具有良好的抗震性能。在位移加载的最后阶段,虽然节点域处产生了明显的剪切变形,但结构仍可以保持很好的整体性。本文通过试验研究及有限元分析揭示了左右梁位置偏移的外加强环式钢框架梁柱异型节点的抗震性能及其破坏模态,研究成果为今后设计该类节点提供了参考,同时也为异型节点的进一步研究打下了良好的基础。
[Abstract]:Nowadays, with the increasing demands on the function of building structure, the structure form is becoming more and more complex. Liang Zhu special-shaped joints have appeared more and more in large industrial and civil buildings. Due to the lack of experimental and theoretical research on the abnormal joints of externally reinforced ring steel frames with deviation to the position of left and right beams, At present, the relevant national norms in this field are still in blank, so there is no reliable design basis for them. Therefore, it is of great theoretical significance and practical value to analyze and study the abnormal joints of this kind of frame. The main content of this paper is the seismic behavior of the abnormal joints of Liang Zhu steel frame with the displacement of left and right beams. Through the previous design calculation, The model is designed in the form of "strong component weak node". The node domain of irregular node is divided into three parts: intermediate node domain and symmetric upper node domain and lower node domain. Using finite element program ABAQUS, the nonlinear finite element analysis of the mechanical behavior of Liang Zhu irregular joints is carried out, and the stress distribution and development law of the joints under low cycle reciprocating load are obtained. The calculation results of the core node domain, the upper node domain and the lower node domain are analyzed and compared. The test specimens of the same size are made, and the low cycle reciprocating loading test is carried out, and the deflection height of the left and right beams of the joints is analyzed and studied. The influence of the setting of the outer stiffened ring plate and the section form of the column on the seismic behavior of the special shaped joints is obtained, and the bearing capacity, deformation performance, hysteretic performance and failure mode of the special shaped joints of the steel frame are obtained. At the same time, it is compared with conventional joints. The experimental results show that this kind of Liang Zhu abnormal joints have good ductility, strong energy dissipation and good seismic performance. In the final stage of displacement loading, Although there is significant shear deformation at the node domain, But the structure can still maintain a good integrity. This paper reveals the seismic behavior and failure mode of Liang Zhu abnormal joints of externally reinforced steel frame with the displacement of left and right beams by means of experimental research and finite element analysis. The research results provide a reference for the design of this kind of joints in the future, and also lay a good foundation for the further study of the abnormal nodes.
【学位授予单位】：沈阳建筑大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU391

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