摘要
钢管铅阻尼器工作性能稳定、耗能能力强,但质量大、成本高。提出一种轻质环保的钢管黏弹性复合阻尼器,并对其构造、原理与特点进行了介绍。采用ABAQUS软件建立实体、中空钢管黏弹性复合阻尼器和钢管铅阻尼器有限元模型,对应力分布、滞回性能、等效累积塑性应变和累积比吸能进行分析。结果表明:钢管黏弹性复合阻尼器工作性能稳定,传力机理明确,滞回曲线饱满对称,在较小的位移即可进入耗能状态,等效阻尼比稳定在45%~50%,累积比吸能大、单位质量耗散能量多,可代替钢管铅阻尼器;实体叠层黏弹性体与中空叠层黏弹性体对钢管黏弹性复合阻尼器性能影响较小,钢管构造参数对钢管黏弹性复合阻尼器性能影响较大;中空钢管黏弹性复合阻尼器综合性能最佳。
The lead-filled steel tube damper has the advantages of stable performance and high energy dissipation,but has the disadvantages of large mass and high cost.A lightweight and environmentally friendly viscoelastic body-filled steel tube damper(referred to as VBSTD)was presented,and its structural details,rationales and characteristics were introduced.The finite element models of solid viscoelastic body-filled steel tube damper(referred to as SVBSTD),hollow viscoelastic body-filled steel tube damper(referred to as HVBSTD)and lead-filled steel tube damper(referred to as LFSTD)were established by using the ABAQUS software,and the behavior of the three types of dampers were simulated and compared in terms of the stress distribution,hysteretic behavior,equivalent cumulative plastic strain and cumulative specific energy.The results show that the VBSTD possesses stable working performance and clear force transfer mechanism,and exhibits full and symmetric hysteretic curves.The VBSTDs can enter the energy dissipating state at a very small displacement(1 mm),while their equivalent damping ratios are steady in the range of 45%-50%,leading to a larger cumulative specific absorption energy and more energy dissipation per unit mass.It can thus replace the LFSTD.The laminated viscoelastic materials with different structures have little influence on the working performance and energy dissipation capacity of the VBSTD,while the structure parameters of steel tube have great influence on its performance.The HVBSTD has the best performance overall.
作者
周云
李家乐
邓雪松
张超
ZHOU Yun;LI Jiale;DENG Xuesong;ZHANG Chao(School of Civil Engineering,Guangzhou University,Guangzhou 510006,China)
出处
《建筑结构学报》
EI
CAS
CSCD
北大核心
2020年第S02期96-103,共8页
Journal of Building Structures
基金
国家重点研发计划重点专项(2017YFC0703608)
关键词
钢管黏弹性复合阻尼器
消能减震
有限元分析
累积比吸能
viscoelastic body filled steel tube damper
energy dissipation
finite element analysis
cumulative specific energy absorption
