中文摘要：

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（1mm）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。

英文摘要：

Seven lead-filled steel tube dampers （LFSTDs） were tested by low-frequency cyclic loading, to make comparative study on their hysteretic behaviors with different design parameters including thickness-diameter ratio, height-diameter ratio and weakening ratio of LFSTDs. The research results indicate that the LFSTDs exhibit full and symmetric hysteretic curves, possess stable working performance, powerful energy dissipation ability and good ductility, enter the energy-dissipating state in a very small displacement （ e. g. l mm） , while their equivalent damping ratios are steady in 0.4-0.5 range, and their displacement ductility coefficients are more than 20. The LFSTDs mainly show three failure modes of shear failure, shear-flexural failure and flexural failure under different thickness-diameter ratios, height-diameter ratios and weakening ratios. The LFSTDs should be designed to dissipate energy mainly by yielding of energy-dissipating parts, and bending failure should be avoided. Impacts on seismic performance of the LFSTDs vary with different thickness-diameter ratios, height-diameter ratios and weakening ratios, respectively. The initial stiffness and bearing capacity of LFSTD increase with the increasing of thickness-diameter ratio, but decrease with the increasing of weakening ratio and height-diameter ratio.