钢管铅阻尼器滞回性能试验研究

发布时间：2018-08-21 11:01

【摘要】：通过对7个钢管铅阻尼器的低周往复加载试验,研究不同厚径比、高径比和削弱比对钢管铅阻尼器滞回性能的影响。研究结果表明:钢管铅阻尼器滞回曲线饱满对称,工作性能稳定,耗能性能和延性好,在很小的位移(1 mm)即进入耗能状态,且快速进入稳定耗能阶段,等效阻尼比稳定在0.4~0.5之间,位移延性系数大于20;钢管铅阻尼器随厚径比、高径比和削弱比的不同而产生剪切、弯剪和弯曲三种破坏类型;设计钢管铅阻尼器时,应保证阻尼器屈服耗能主要集中在耗能段范围内,避免发生弯曲破坏;厚径比、高径比和削弱比对钢管铅阻尼器的初始刚度和承载力影响较大,随厚径比增大,钢管铅阻尼器的初始刚度和承载力增大,随高径比、削弱比增大,钢管铅阻尼器的初始刚度和承载力减小。
[Abstract]:Based on the low-cycle cyclic loading tests of seven steel tube lead dampers, the effects of different thick-diameter ratio, height to diameter ratio and weakening ratio on the hysteretic performance of the steel tube lead dampers were studied. The results show that the hysteretic curve of the steel tube lead damper is full and symmetrical, the working performance is stable, the energy dissipation performance and ductility are good, and it enters the energy dissipation state at a very small displacement (1 mm), and rapidly enters the stable energy dissipation stage. The equivalent damping ratio is between 0.4 and 0.5, and the displacement ductility coefficient is greater than 20. The lead damper of steel tube is shearing with the ratio of thickness to diameter, ratio of height to diameter and ratio of weakening, bending shear and bending. It is necessary to ensure that the yield energy dissipation of the damper is mainly concentrated in the energy dissipation section to avoid bending failure, and that the ratio of thickness to diameter, the ratio of height to diameter and the ratio of weakening to weakening have great effects on the initial stiffness and bearing capacity of the steel tube lead damper, and increase with the thickness to diameter ratio. The initial stiffness and bearing capacity of the steel tube lead dampers increase, and the initial stiffness and bearing capacity of the steel tube lead dampers decrease with the increase of the ratio of height to diameter.
【作者单位】：广州大学土木工程学院;常州容大结构减振股份有限公司;
【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

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