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针对某大型复杂结构的地震响应及控制策略进行了研究。首先,建立该结构的整体有限元模型,采用Ritz向量法对结构进行模态分析,研究该复杂结构的振动特性,基于位能加权平均法求解了该复杂结构等效阻尼比;随后,研究了不同布置型式下粘滞消能支撑的受力特点和计算模型;最后.对该结构进行减振设计,分析了不同消能支撑布置形式下的减振效果。结果表明,采用消能减震装置能有效降低复杂结构的地震响应,且并不改变结构体型;同等减震效果前提下,采用人字形支撑比采用斜撑更为经济。本文工作可供类似的大型复杂结构减震设计参考和借鉴。
The seismic response and control strategy of a large complex structure are studied. First, the overall finite element model of the structure is established, the structure is modeled by Ritz vector method, the vibration characteristics of the complex structure are studied, and the equivalent damping ratio of the complex structure is calculated based on the bit energy weighted average method. Subsequently, The dynamic characteristics and the calculation model of viscous energy dissipative support under different layout types are discussed.Finally, the design of the structure is carried out to reduce the vibration, and the vibration reduction effect under different forms of energy dissipation brace is analyzed. The results show that the use of energy dissipation devices can effectively reduce the seismic response of complex structures without changing the size of the structure. With the same damping effect, chevron support is more economical than the use of diagonal braces. The work of this paper can be used as a reference for similar large-scale and complex structure damping design.