仿古建筑矩形与圆形钢管柱连接抗震性能试验研究

发布时间：2018-06-12 22:58

本文选题：仿古建筑 + 矩形钢管柱　；参考：《建筑结构学报》2016年02期

【摘要】：为研究仿古建筑中矩形与圆形截面钢管柱连接的破坏形态和抗震性能,设计制作了4个缩尺比例为1∶1.5的矩形与圆形截面钢管柱连接模型,通过施加一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,得到了柱端水平荷载-位移滞回曲线和骨架曲线。分析了长细比、轴压比对试件的破坏模式、滞回性能、刚度、承载力、延性和耗能能力的影响。结果表明:矩形与圆形截面钢管柱连接的破坏形态主要是矩形截面钢管柱翼缘根部周围焊缝开裂;滞回曲线饱满,刚度退化慢,承载力高,破坏时试件的位移延性系数介于4.17~4.97之间,等效黏滞阻尼系数介于0.445~0.537之间,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软件对该类连接构件进行了非线性分析,研究了轴压比、材料屈服强度、矩形钢管板件宽厚比等参数对其力学性能的影响,结果表明:提高轴压比和材料屈服强度,可提高连接构件的水平承载力,但延性降低;随着矩形钢管板件宽厚比的提高,连接构件的延性提高,但承载力有所降低。
[Abstract]:In order to study the failure mode and seismic behavior of the connection between rectangular and circular steel tubular columns in ancient buildings, four models of connection between rectangular and circular steel tubular columns with scale of 1: 1.5 were designed and made. By applying vertical load with a certain axial compression ratio and low cycle reciprocating horizontal load, the load failure test of the column connection model was carried out. The stress process and failure mode of the specimen were observed, and the horizontal load-displacement hysteretic curve and skeleton curve at the end of the column were obtained. The effects of slenderness ratio axial compression ratio on failure mode hysteretic performance stiffness bearing capacity ductility and energy dissipation capacity of the specimens are analyzed. The results show that the failure mode of the connection between rectangular steel tube column and circular steel tube column is mainly the cracking of weld around the flange of rectangular steel tube column, the hysteretic curve is full, the stiffness degradation is slow, and the bearing capacity is high. The displacement ductility coefficient and equivalent viscous damping coefficient 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 experimental study, the nonlinear analysis of this kind of connection members is carried out by using Abaqus software, and the effects of axial compression ratio, material yield strength and width to thickness ratio of rectangular steel tube plate on its mechanical properties are studied. The results show that the horizontal bearing capacity of the connection members can be increased by increasing the axial compression ratio and the material yield strength, but the ductility decreases, and the ductility of the connection members increases with the increase of the ratio of width to thickness, but the bearing capacity decreases.
【作者单位】：西安建筑科技大学土木工程学院;中国建筑西北设计研究院有限公司;
【基金】：国家自然科学基金项目(51208411) 中建股份科技研发课题(CSCEC-2012-Z-16)
【分类号】：TU392.3;TU352.11

【共引文献】