钢管叠层黏弹性阻尼器是由钢管和叠层黏弹性体等组成。为建立钢管叠层黏弹性阻尼器设计方法,将钢管叠层黏弹性阻尼器力学模型等效为叠层黏弹性体的线性模型和钢管的双线性模型叠加,通过虚功原理推导出钢管叠层黏弹性阻尼器初始刚度计算公式;由von Mises屈服准则推导出钢管叠层黏弹性阻尼器屈服承载力计算公式,在此基础上推导出屈服位移和极限承载力计算公式,给出钢管叠层黏弹性阻尼器的设计流程。采用有限元分析软件对4个钢管叠层黏弹性阻尼器进行模拟分析,并与理论计算结果对比,验证了理论计算公式与设计流程的合理性。研究结果表明:钢管叠层黏弹性阻尼器等效计算模型合理可靠;初始刚度、屈服力、屈服位移和极限承载力的理论公式计算结果与有限元模拟结果吻合较好,且理论公式计算结果偏于安全;给出的设计流程简单可行,可用于钢管叠层黏弹性阻尼器的设计与加工制造。
Abstract
The laminated viscoelastic body filled steel tube damper (LVBSTD) is composed of steel tube and laminated viscoelastic body. In order to establish the design method of the laminated viscoelastic body filled steel tube damper, the mechanical model of the LVBSTD was equivalent to the superposition of linear model of the laminated viscoelastic body and the bilinear model of the steel tube, the initial stiffness calculation formula of the LVBSTD was deduced based on the principle of virtual work, and the yield bearing capacity calculation formula of the LVBSTD was deduced based on the von Mises yield criterion. On this basis, the calculation formulae of yield displacement and ultimate bearing capacity were derived, and the design process of LVBSTD was given. The finite element software was used to simulate and analyze four LVBSTDs, and compared with the theoretical calculation results to verify the rationality of the theoretical calculation formula and design process. The results show that the equivalent calculation model of the LVBSTD is reasonable and reliable, the theoretical calculation results of the initial stiffness, yield force, yield displacement and ultimate bearing capacity are in good agreement with the finite element simulation results, and the theoretical calculation results are on the safe side. The given design process is simple and feasible, and can be used for the design and manufacture of LVBSTD.
关键词
钢管叠层黏弹性阻尼器 /
力学参数 /
理论公式 /
有限元分析 /
设计方法
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Key words
LVBSTD /
mechanical parameter /
theoretical formula /
finite element analysis /
design method
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参考文献
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脚注
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基金
国家重点研发计划重点专项(2017YFC0703608)。
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