钢管混凝土叠合柱—钢筋混凝土梁节点滞回性能研究

发布时间：2018-01-06 15:14

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

【摘要】：钢管混凝土叠合柱由于承载力高、延性和耐火性能好,已逐渐应用于建筑结构和桥梁结构中。同时,钢筋混凝土梁也被广泛应用于建筑结构中。而节点是建筑结构的关键部位,因此,有必要深入研究钢管混凝土叠合柱-钢筋混凝土梁节点的力学性能。本文主要利用试验方法和有限元法研究该类节点的抗震性能。主要成果如下：(1)本文首先论述了该类节点的研究现状和研究的必要性。(2)进行了4个钢管混凝土叠合柱-钢筋混凝土梁连接节点的滞回试验。试验的主要参数包括柱的轴压比和是否带楼板。通过试验研究分析以上参数对该类节点抗震性能的影响规律,从而对该类型节点的抗震性能做出定量的评估。试验结果表明,该类节点的梁端力-位移滞回曲线较饱满,刚度和强度退化稳定,且破坏模态均为梁端弯曲破坏。因此,该类节点具有良好的抗震性能。(3)建立了有限元模型。模型考虑了材料和几何非线性、混凝土损伤、钢管和混凝土接触、纵筋与混凝土的粘结滑移、钢材的包辛格效应和钢筋的卸载刚度退化等因素的影响。该模型的正确性和有效性得到了本文试验数据的验证。基于有限元模型对该类节点的工作机理进行分析。(4)基于该模型还进行了大量的参数分析。分析的参数包括核心钢管强度、外加强环宽度、暗牛腿强度、暗牛腿长度、钢筋混凝土楼板宽度、钢筋混凝土楼板配筋率、柱轴压比和钢筋混凝土梁的抗弯承载力。研究表明,影响该类节点滞回性能的关键因素为柱轴压比和梁的抗弯承载力,其余参数的影响较小。
[Abstract]:Because of its high bearing capacity, high ductility and good fire resistance, concrete filled steel tubular composite columns have been gradually used in building structures and bridge structures. Reinforced concrete beams are also widely used in building structures. It is necessary to study the mechanical properties of concrete-filled steel tubular composite column-reinforced concrete beam joints. In this paper, the seismic behavior of this kind of joints is studied by means of test method and finite element method. The main results are as follows: 1). In this paper, we first discuss the research status and necessity of this kind of node. The hysteretic tests of four concrete-filled steel tubular composite column-reinforced concrete beam connections are carried out. The main parameters of the tests include the axial compression ratio of columns and whether or not there is a floor slab. The effect of performance. The experimental results show that the beam-end load-displacement hysteretic curves are full and the stiffness and strength of the joints are stable. And the failure modes are bending failure of beam end. Therefore, this kind of joints have good seismic performance. The finite element model is established. The model takes into account the material and geometric nonlinearity, concrete damage. The contact between steel tube and concrete, and the bond slip between longitudinal reinforcement and concrete. The effect of Bauschinger effect on steel and the degradation of unloading stiffness of steel bar, etc. The correctness and validity of the model are verified by the experimental data in this paper. Based on the finite element model, the working mechanism of this kind of joint is analyzed. (. 4) based on the model, a large number of parameters are analyzed, including the strength of the core steel pipe. The results show that: width of outer reinforcement ring, strength of dark corbel, length of dark corbel, width of reinforced concrete floor, reinforcement ratio of reinforced concrete floor, axial compression ratio of column and flexural capacity of reinforced concrete beam. The key factors affecting the hysteretic performance of the joints are the axial compression ratio of the column and the flexural bearing capacity of the beam, while the other parameters have little effect on the hysteretic behavior of the joints.
【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

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