新型分阶段屈服型软钢阻尼器的试验研究及数值模拟  

Experiments and numerical prediction on a new type of mild steel damper with separable phase yielding

作　　者：刘伟庆[1] 缪卓君[1] 王曙光[1] 杜东升[1] 

机构地区：[1]南京工业大学土木工程学院,南京211816

出　　处：《振动与冲击》2016年第3期87-92,共6页Journal of Vibration and Shock

基　　金：国家科技支撑计划资助(2012BAJ07B00);国家科技支撑计划资助(2012BAJ06B00)

摘　　要：为弥补现有软钢阻尼器存在的不足,在耗能钢片的形状及组合规律方面加以改进,研发了一种剪切弯曲组合型分阶段屈服软钢阻尼器。采用试验和有限元模拟相结合的研究方法,探讨其基本性能和抗疲劳性能。试验结果显示这种阻尼器具有稳定的滞回性能和抗疲劳性能,表明了这种分阶段屈服型软钢阻尼器耗能效果明显,实现了两阶段屈服耗能机制,具有较好的减震效果,数值模拟结果与试验结果吻合良好。该型阻尼器构造简单,制作方便,可采用模块化组装设计方法,有广阔的工程应用前景。To compensate for the shortcomings of existing mild steel dampers, the shape of energy dissipating steel sheets and their combination type were improved and a new type of mild steel damper with shear-bending combined-stage yielding was presented. The performances of the damper, consisting of shear energy dissipation components and bending energy dissipation components, were analyzed by experiments and finite element simulation. The experimental results show that the damper possesses the stable hysteretie capacity and fatigue resistance capacity, so has strong energy consumption capability and great damping effect. It achieves a two-stage energy-yielding mechanism. The results of numerical simulation are in good agreement with those of experiments. This kind of damper has such advantages as obvious phased energy character, superior performance and simple structure. It can be designed by the method of module and assemble. The damper would have wide application prospect in future.

关 键 词：软钢阻尼器 滞回性能 低周反复荷载试验 数值模拟 

分 类 号：TU317[建筑科学—结构工程] TU352.1