中文摘要：

影响钢管铅阻尼器性能的主要构造参数有厚径比、削弱比和高径比。设计13个不同构造参数的钢管铅阻尼器，采用ABAQUS有限元软件对其进行模拟分析，研究厚径比、削弱比和高径比对钢管铅阻尼器传力机制、塑性分布状态和耗能机理的影响。分析结果表明：①钢管铅阻尼器的钢管和铅芯协同工作，共同耗能，传力机制和耗能机理明确；②钢管铅阻尼器受力过程分为弹性，弹塑性和塑性三个阶段，但弹性阶段和弹塑性阶段很短，屈服位移很小，在1mm内即能进入屈服耗能；③厚径比、削弱比和高径比对钢管铅阻尼器传力机制和协同工作性能影响不大；④厚径比、削弱比和高径比对钢管铅阻尼器塑性变形分布影响很大；合理取值可以保证钢管铅阻尼器屈服耗能集中在阻尼器中部，且具有较合理的塑性分布模式；建议厚径比在满足加工前提下尽可能取小值，削弱比取0．3～0．4，高径比取2．3—2．6；⑤钢管铅阻尼器耗能时，铅芯先屈服耗能而钢管为弹性，耗能全部由铅芯承担；接着钢管屈服与铅芯共同耗能；钢管进入塑性后钢管和铅芯耗能比很快就趋于稳定，钢管耗能占总耗能80％以上，铅芯耗能占总耗能10％～20％之间。

英文摘要：

Thickness-diameter ratio, weakening ratio and height-diameter ratio are the main configuration parameters of lead-filled steel tube damper （LFSTD）. To study the impacts of configuration parameters on the force-transfer mechanism, plastic-deformation distribution and energy-dissipation mechanism of LFSTD, 13 LFSTDs, with different configuration parameters, were designed and simulated by ABAQUS. The results suggest that （ 1 ） steel tube of LFSTD and lead core work cooperatively and dissipate energy together, while the force-transfer mechanism and energy- dissipation principle of LFSTD are clear. （2.） The stress process of LFSTD can be divided into three phases including elastic phase, elastic-plastic phase and plastic phase. However, the elastic and elastic-plastic phases are short, and yielding displacement is small, so that LFSTD may go into yielding and energy dissipating even for 1 mm displacement. （3） Thickness-diameter ratio, weakening ratio and height-diameter ratio may not remarkably affect the force-transfer mechanism of LFSTD. （4） Thickness-diameter ratio, weakening ratio and height-diameter ratio may significantly affect the plastic-deformation distribution of steel tube. To achieve the nice plastic-deformation distribution and the yielding energy dissipation concentrated in the middle part of LFSTD, the thickness-diameter ratio shall be as small as possible, the weakening ratio and height-diameter ratio shall be taken as 0. 3 - 0.4 and 2.3 - 2.6, respectively. （5） During the energy dissipation process of LFSTD, lead core may yield and dissipate energy first with steel tube still remaining in the elastic state, and then steel tube goes into yielding and dissipates energy together with lead core. Once the energy dissipation of steel tube and lead core become stable, the energy dissipation of steel tube accounts for above 80% of total energy dissipation, while the energy dissipation of lead core may account for about 10% - 20% of total energy dissipation.