钢管混凝土叠合柱—钢梁连接节点滞回性能研究

发布时间：2018-01-18 02:16

本文关键词：钢管混凝土叠合柱—钢梁连接节点滞回性能研究　出处：《福州大学》2013年硕士论文　论文类型：学位论文

【摘要】：随着钢管混凝土叠合柱在建筑结构中的逐渐应用,其基本力学性能的研究就显得尤为重要。节点是建筑结构的关键部位,因此针对钢管混凝土叠合柱-梁连接节点力学性能的研究具有很高的研究价值与现实意义。本文以某实际工程中的钢管混凝土叠合柱-钢梁连接节点为背景,研究该类节点的滞回性能,主要研究工作和取得的成果如下：(1)以轴压比、是否带楼板为主要参数,进行了4个钢管混凝土叠合柱-钢梁连接节点的滞回试验。加载方式为梁端加载,同时在柱顶施加恒定轴力。试验结果表明,钢管混凝土叠合柱-钢梁连接节点的滞回曲线较为饱满,刚度和强度退化稳定,说明该类节点具有良好的抗震性能。(2)采用有限元软件ABAQUS进行数值模拟。该模型考虑结构几何非线性、材料非线性、钢管同混凝土的界面接触、钢筋同混凝土的粘接滑移及初始几何缺陷。同时利用现有的试验研究结果验证了该有限元模型的精度和可靠性。(3)基于该有限元模型,本文对该类节点进行了全过程分析,明晰该类节点的破坏模态、应力和应变的发展规律。同时进行了大量的参数分析,具体参数如下：柱轴压比、梁柱抗弯承载力比、梁柱线刚度比、柱含钢率、内外混凝土强度比以及节点是否带楼板。研究各参数对该类节点滞回性能的影响规律,参数分析结果认为对节点承载力影响较大的因素有柱轴压比、梁柱抗弯承载力比以及节点带楼板与否,梁柱线刚度比、柱含钢率和内外混凝土强度比对节点构件承载力的影响不明显。本文列举的参数对试件初始抗弯刚度均无明显影响。
[Abstract]:With the gradual application of concrete-filled steel tubular composite columns in the building structure, the study of its basic mechanical properties is particularly important. The joint is the key part of the building structure. Therefore, it is of great value and practical significance to study the mechanical properties of concrete-filled steel tubular (CFST) composite column-beam connections. In this paper, the concrete filled steel tubular column-steel beam connections in a practical project as the background. To study the hysteretic performance of this kind of joints, the main research work and the results obtained are as follows: 1) taking axial compression ratio as the main parameter, whether or not the floor is taken as the main parameter. The hysteretic tests of four concrete-filled steel tubular (CFST) composite column-steel beam connections are carried out. The loading mode is beam-end loading and at the same time applying constant axial force on the top of the column. The test results show that. The hysteretic curves of concrete-filled steel tubular composite column-steel beam connections are relatively full, and the stiffness and strength of the joints are stable and degraded. It shows that this kind of joints have good seismic performance. The finite element software ABAQUS is used to carry out numerical simulation. The model takes into account the geometric nonlinearity of the structure, the material nonlinearity and the interface contact between the steel tube and concrete. At the same time, the accuracy and reliability of the finite element model are verified by using the existing experimental results, which is based on the finite element model. In this paper, the whole process analysis of this kind of joints is carried out, and the failure modes, stress and strain development laws of the joints are clarified. At the same time, a large number of parameters are analyzed, the specific parameters are as follows: column axial compression ratio. Liang Zhu's flexural bearing capacity ratio, Liang Zhu line stiffness ratio, column steel ratio, internal and external concrete strength ratio and whether the joints have floor. The influence of various parameters on hysteretic performance of this kind of joints is studied. The results of parameter analysis show that the main factors influencing the bearing capacity of joints are column axial compression ratio, Liang Zhu flexural bearing capacity ratio, whether the joint has floor or not, and Liang Zhu line stiffness ratio. The effect of the ratio of steel content and the ratio of internal and external concrete strength on the bearing capacity of joint members is not obvious. The parameters listed in this paper have no obvious effect on the initial flexural stiffness of the specimens.
【学位授予单位】：福州大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TU398.9

【相似文献】