钢管铅阻尼器的性能试验研究

发布时间：2018-01-31 06:03

本文关键词： 钢管铅阻尼器金属阻尼器阻尼器消能减震多向阻尼器　出处：《土木工程学报》2017年01期 　论文类型：期刊论文

【摘要】：提出一种新型的钢管铅阻尼器,介绍其构造形式、工作机理及特点。设计制作两个钢管铅阻尼器试件,对其进行低周反复荷载试验和有限元模拟分析,研究钢管铅阻尼器的工作性能、耗能能力和破坏特征。研究结果表明:钢管铅阻尼器工作性能和耗能性能稳定;滞回曲线对称且饱满,近似于平行四边形,耗能能力强,屈服后等效阻尼比在0.45~0.50之间;阻尼器能在很小位移下屈服耗能,屈服位移小于1mm,而屈服后的变形能力很强,延性比大于20;钢管中部合理削弱能有效控制阻尼器的应力分布,使得阻尼器的变形和耗能集中在中部,避免阻尼器由于端部连接破坏而使阻尼器过早退出工作。
[Abstract]:A new type of steel tube lead damper is proposed, and its structure, working mechanism and characteristics are introduced. Two steel tube lead dampers are designed and fabricated for low cycle repeated load test and finite element simulation analysis. The working performance, energy dissipation capacity and failure characteristics of the steel tube lead damper are studied. The results show that the working performance and energy dissipation performance of the steel tube lead damper are stable. The hysteretic curve is symmetrical and full, approximately parallelogram, strong energy dissipation ability, and the equivalent damping ratio after yield is between 0.45 and 0.50; The damper can yield energy under very small displacement, yield displacement is less than 1mm, but the deformation ability after yield is very strong, the ductility ratio is more than 20; Reasonable weakening of the middle of the steel tube can effectively control the stress distribution of the damper, so that the deformation and energy dissipation of the damper are concentrated in the middle, and the damper is prevented from exiting from work prematurely because of the failure of the end connection of the damper.
【作者单位】：广州大学;常州容大结构减振设备有限公司;
【基金】：长江学者和创新团队发展计划(IRT13057) 广东自然科学基金研究团队项目(8351009101000001) 广州市高校“羊城学者”首席科学家项目(10A026S)
【分类号】：TU352.1
【正文快照】： 引言铅具有塑性变形能力强和动态再结晶的特点,即具有较强耗能能力和常温下不发生累积塑性疲劳的优点,因此常被用来制作阻尼器[1-2]。目前,国内外已研制出铅挤压阻尼器、铅剪切阻尼器、铅弯曲阻尼器(圆柱形铅阻尼器和异型铅阻尼器)等不同类型和构造的铅阻尼器,其中一些阻尼器

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