空间钢构架—钢管混凝土组合柱抗震性能试验研究

发布时间：2018-03-01 19:17

本文关键词： 空间钢构架钢管混凝土柱约束作用抗震性能有限元分析　出处：《苏州科技大学》2016年硕士论文　论文类型：学位论文

【摘要】：空间钢构架-钢管混凝土组合柱是一种新型的组合柱。在以往的研究中,通常将钢管外侧的混凝土看成是普通混凝土,没有考虑空间钢构架对混凝土的约束作用。但在大量试验及分析的结果上看,空间钢构架对混凝土的约束作用是十分明显的,可以提高被约束混凝土的强度和变形能力,改善组合柱的抗震性能。本文主要研究空间钢构架-钢管混凝土组合柱的抗震性能和受力性能。本课题以轴压比、空间钢构架含钢率、外侧钢骨形式以及内埋钢骨形式为参数设计了六个空间钢构架-钢管混凝土组合柱和一个双空间钢构架混凝土柱,主要通过对试件的破坏形态、滞回曲线、骨架曲线、耗能性能、延性、以及刚度和承载力退化等方面进行对比研究。试验结果表明,当其他参数不变,随着轴压比的降低或空间钢构架含钢率的增大,试件的滞回曲线变得饱满,延性和耗能性能提高,承载力和刚度退化也变得缓慢。本文采用ABAQUS有限元软件对空间钢构架-钢管混凝土组合柱的试验进行了验证,并设计了多组对比参数对空间钢构架-钢管混凝土组合柱的抗震性能和受力性能进行研究,参数主要包括轴压比、内埋钢管径厚比、空间钢构架的含钢率、空间钢构架缀条的间距和宽度等。分析表明,上述参数均可以影响空间钢构架-钢管混凝土组合柱的抗震性能,进一步分析表明,轴压比、内埋钢管混凝土的套箍指标和空间钢构架的套箍系数是影响空间钢构架-钢管混凝土组合柱承载力的主要因素。
[Abstract]:The spatial steel frame-concrete-filled steel tube composite column is a new type of composite column. In previous studies, the concrete on the outer side of the steel tube is usually regarded as ordinary concrete. The constraint effect of space steel frame on concrete is not taken into account. However, based on a large number of experimental and analytical results, the constraint effect of space steel frame on concrete is very obvious, which can improve the strength and deformation ability of confined concrete. In this paper, the seismic behavior and mechanical behavior of space steel frame-concrete-filled steel tubular composite columns are studied. Six spatial steel frame-concrete filled steel tubular composite columns and a double-space steel frame concrete column are designed as parameters of the lateral steel bone form and the embedded steel bone form. The failure patterns, hysteretic curves and skeleton curves of the specimens are analyzed. The energy dissipation performance, ductility, stiffness and bearing capacity degradation are compared. The experimental results show that the hysteretic curves become full with the decrease of axial compression ratio or the increase of steel content of spatial steel frame when other parameters are not changed. With the improvement of ductility and energy dissipation performance, the degradation of bearing capacity and stiffness becomes slower. In this paper, the ABAQUS finite element software is used to verify the experiment of spatial steel-frame-concrete-filled steel tubular composite columns. The seismic behavior and mechanical behavior of spatial steel frame-concrete-filled steel tubular composite columns are studied by designing several sets of contrast parameters. The parameters mainly include axial compression ratio, diameter to thickness ratio of buried steel pipe, steel content ratio of space steel frame, and so on. The analysis shows that the above parameters can affect the seismic behavior of the spatial steel frame-steel tube concrete filled columns, and further analysis shows that the axial compression ratio, The hoop index of concrete filled steel tubular (CFST) and the hoop coefficient of spatial steel frame are the main factors that affect the bearing capacity of spatial steel frame-CFST composite columns.
【学位授予单位】：苏州科技大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TU398.9;TU352.11

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