改进型双钢管约束屈曲支撑试验研究

发布时间：2018-05-06 09:05

本文选题：约束屈曲支撑 + 静力试验　；参考：《建筑结构学报》2014年09期

【摘要】：为提高双钢管约束屈曲支撑内核的抗侧刚度,在内核钢管上增设接触环,形成带接触环的改进型双钢管约束屈曲支撑。通过对5个不同构造的改进型双钢管约束屈曲支撑试件进行轴向单调加载、轴向低周往复加载试验,研究该类型约束屈曲支撑的承载能力、延性与耗能性能;分析外套钢管刚度、双管间隙大小、内核钢管长细比等参数对该约束屈曲支撑性能的影响。结果表明:该类型支撑受压时能够屈服而不屈曲,延性良好且滞回曲线饱满,具有良好的耗能能力;外套钢管的刚度和其与内核钢管间隙大小对该支撑的性能影响较大;试件骨架曲线均经历了弹性与弹塑性阶段,其恢复力模型可采用三折线或两折线模型。
[Abstract]:In order to improve the lateral stiffness of the inner core of double steel tube restrained buckling bracing, a contact ring was added to the inner steel tube to form an improved double steel pipe constrained buckling bracing with contact ring. The load-carrying capacity ductility and energy dissipation performance of the modified double-pipe buckling braces with different structures were studied by axial monotone loading and axial low-cycle reciprocating loading tests. The effects of the stiffness of the jacket steel tube, the clearance of the double pipe and the aspect ratio of the inner core steel tube on the buckling behavior of the confined steel tube are analyzed. The results show that this type of braces can yield without buckling, have good ductility, full hysteretic curves and good energy dissipation capacity, and the stiffness of jacket steel tube and the size of gap between jacket steel tube and inner core steel pipe have great influence on the performance of the bracing. The skeleton curves of the specimens have undergone elastic and elastoplastic stages, and their restoring force models can be modeled by three or two broken lines.
【作者单位】：兰州理工大学土木工程学院;
【基金】：国家自然科学基金项目(51368037) 甘肃省高等学校基本科研业务费专项资金项目甘肃省建设科技建筑节能项目(JK2014-11)
【分类号】：TU398.9

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