仿古建筑方钢管柱与圆钢管柱连接抗震性能试验及ABAQUS有限元分析

发布时间：2018-06-13 04:57

本文选题：仿古建筑 + 钢结构　；参考：《西安建筑科技大学》2015年硕士论文

【摘要】：仿古建筑传承了中国古建筑造型优美、大气磅礴的特点,在实际工程中得到越来越广泛的应用。柱是仿古建筑的重要组成部分,其外形和传统古建筑柱的外形保持一致。仿古建筑方钢管柱与圆钢管柱连接的上、下柱采用了不同的截面形式,其连接构造、传力方式与现代建筑常规钢结构节点有很大不同,至今缺乏系统的试验研究和理论分析,目前尚无针对此类构件的设计规范可供借鉴。为了研究仿古建筑方钢管柱与圆钢管柱连接的破坏形态和抗震性能,设计并制作了4个缩尺比例为1/1.5的柱连接模型,通过施加恒定轴压比的竖向荷载和低周往复水平荷载,对柱连接模型进行加载破坏试验。观察了试件的受力过程及破坏形态,得到了柱端荷载-位移滞回曲线和骨架曲线,分析了试件类型、轴压比对试件的破坏模式、滞回性能、刚度、承载力、延性、耗能能力等的影响。结果表明:仿古建筑方钢管柱与圆钢管柱连接的破坏模式主要是方钢管柱翼缘根部周围焊缝的开裂;滞回曲线饱满,刚度退化小,承载能力高,破坏时试件的位移延性系数介于4.17~4.97,等效黏滞阻尼系数介于0.445~0.537,具有很好的耗能能力及抗震性能。在试验研究的基础上,利用ABAQUS软件对其受力性能进行了非线性有限元分析,并与试验结果进行了对比。两者吻合较好。在此基础上,研究了轴压比、钢材屈服强度、方钢管板件宽厚比等参数对柱连接的承载力、刚度和延性的影响规律。结果表明:在一定范围内,随轴压比的增大,试件的水平承载力和刚度降低,位移延性呈升高的趋势;随钢材屈服强度的增加,试件的水平承载力和刚度提高,位移延性呈降低的趋势;随方钢管板件宽厚比的增加,试件的水平承载力和刚度降低,位移延性呈升高的趋势。研究结果可为钢结构仿古建筑方钢管柱与圆钢管柱连接的抗震设计及工程运用提供参考。
[Abstract]:The archaic architecture inherits the beautiful and magnificent features of Chinese ancient architecture, and is more and more widely used in practical engineering. Column is an important part of ancient architecture, and its shape is consistent with that of traditional ancient architecture. In the connection between square steel pipe column and round steel pipe string in ancient buildings, the lower column adopts different cross-section forms. Its connection structure and force transfer mode are very different from those of conventional steel structure joints in modern buildings. So far, there is a lack of systematic experimental research and theoretical analysis. At present, there is no design specification for this kind of components to be used for reference. In order to study the failure mode and seismic behavior of the connection between square steel pipe column and round steel pipe column in ancient building, four column connection models with scale of 1 / 1.5 were designed and made. The vertical load of constant axial compression ratio and the low cycle reciprocating horizontal load were applied. The loading failure test was carried out on the column connection model. The load-displacement hysteretic curve and skeleton curve at the end of the column are obtained, and the failure mode, hysteretic property, stiffness, bearing capacity, ductility of the specimen are analyzed, and the failure mode, hysteretic property, stiffness, bearing capacity and ductility of the specimen are analyzed. The influence of energy dissipation, etc. The results show that the failure mode of the connection between square steel pipe column and round steel pipe column in ancient building is mainly the cracking of weld around the flange of square steel pipe column, the hysteretic curve is full, the stiffness is small, the bearing capacity is high. The displacement ductility coefficient and equivalent viscous damping coefficient of the specimens are between 4.17 ~ 4.97 and 0.445 ~ 0.537 respectively, which have good energy dissipation capacity and seismic performance. On the basis of the experimental research, the nonlinear finite element analysis of the mechanical properties of Abaqus is carried out, and the results are compared with the experimental results. The two match well. On this basis, the influence of axial compression ratio, steel yield strength and width to thickness ratio of square steel tube on the bearing capacity, stiffness and ductility of column connections are studied. The results show that the horizontal bearing capacity and stiffness decrease, the displacement ductility increases with the increase of axial compression ratio, and the horizontal bearing capacity and stiffness increase with the increase of steel yield strength. With the increase of the ratio of width to thickness, the horizontal bearing capacity and stiffness decrease, and the displacement ductility increases. The results can provide reference for seismic design and engineering application of connection between square steel pipe column and round steel pipe column of steel structure.
【学位授予单位】：西安建筑科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TU352.11;TU392.3

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