【摘要】 本文以某一大型直流电压发生器塔架结构为例,建立有限元计算模型,采用调幅正弦五波、Taft地震波、El-Centro地震波、云南澜沧地震波和正弦三波5种地震动输入,通过数值计算,讨论了不同输入地震波对于结构抗震设计的影响。结果表明,地震作用效应在这类特种结构的组合响应中起重要影响,采用调幅正弦五波、正弦三波作为地震输入,过分夸大了实际的地震作用效应。最后,对这类特种结构的输入地震动提出了相应建议。更多还原

【Abstract】 A finite element model for the structure of a large DC voltage generator tower is established in this paper.Five seismic waves,i.e.five-amplitude-modulation-sine wave,Taft earthquake wave,El-Centro seismic wave,Yunnan Lancang seismic waves and three-sine wave,are taken as the seismic input for the seismic response analysis of the structure.The influence of different input wave on the seismic design of the structure is discussed through numerical analysis.The numerical results show that the seismic action effect has important influence on the final combination responses of this particular structure and the seismic action effect is overestimated when using five-amplitude-modulation-sine wave and three-sine wave as seismic input.Finally,some suggestions of seismic input for this type of particular structure are proposed.更多还原