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研制开发了一种钢铅粘弹性阻尼器,介绍了该种阻尼器的构造、耗能机理及特点,设计出钢铅粘弹性阻尼器试验模型,利用压剪试验机完成阻尼器试验模型在不同幅值下的低周反复荷载试验,采用Bouc-Wen模型和双线性模型模拟了钢铅粘弹性阻尼器的滞回性能。研究结果表明:1)钢铅粘弹性阻尼器滞回曲线光滑饱满,具有良好的耗能性能;2)铅芯、钢芯和粘弹性材料在剪切变形过程中发挥了良好作用,提高了阻尼器水平剪力、初始刚度和耗能能力;3)阻尼器在大变形过程没有出现粘弹性材料外鼓和撕裂现象,并能恢复到原始加载位置,其具有较好的大变形能力和自恢复性能;4)Bouc-Wen模型、双线性模型模拟的滞回曲线与试验滞回曲线吻合的较好,分析时采用Bouc-Wen模型、双线性模型模拟阻尼器的滞回性能是可行的。
A kind of steel-lead viscoelastic damper was developed. The structure, energy-dissipation mechanism and characteristics of this kind of damper were introduced. The experimental model of steel-lead viscoelastic damper was designed. Amplitude cyclic loading test, Bouc-Wen model and bilinear model were used to simulate the hysteretic behavior of steel-lead viscoelastic dampers. The results show that: 1) the hysteretic curve of the steel-lead viscoelastic damper is smooth and full, and has good energy dissipation performance; 2) the lead, steel core and viscoelastic material play a good role in the shear deformation and improve the damping The horizontal shear force, the initial stiffness and the energy dissipation capacity of the damper; 3) the damper does not appear outer drum and tear of viscoelastic material in the process of large deformation, and can return to the original loading position, which has better deformation capacity and Recovery performance; 4) Bouc-Wen model, the bilinear model simulates the hysteresis curve is in good agreement with the experimental hysteresis curve, the Bouc-Wen model is used in the analysis, the bilinear model simulates the hysteresis performance of the damper is feasible of.