云南地区竖向设计反应谱特征参数研究

Characteristic Parameters of Vertical Design Response Spectrum in Yunnan Region

摘要: 随着对地震灾害研究的加深，竖向地震动在抗震设计中的重要性越来越受到关注。本文针对云南地区竖向地震反应谱进行了系统研究，对云南地区地震数据进行拟合，得出云南竖向设计反应谱参数${\beta }_{max}$ 、$T_{vg}$ 、$\gamma$ ，并且给出了在云南地区二类场地条件的场地放大系数建议值为2.20；给出了在二类场地条件下的衰减关系式，得到下降段的反应谱曲线和衰减公式，并最后提出云南地区竖向地震动设计反应谱三段式的建议公式。研究结果表明，本文提出的反应谱建议式能够有效反映云南地区地震特征，适用于不同场地类别和震中距条件下的设计需求。

Abstract: With the deepening of the research on seismic hazards, the importance of vertical ground shaking in seismic design is getting more and more attention. This paper carries out a systematic study on the vertical seismic response spectrum in Yunnan region, fits the seismic data in Yunnan region, derives the parameters of Yunnan vertical design response spectrum ${\beta }_{max}$ , $T_{vg}$ , $\gamma$ , and gives the suggested value of site amplification coefficient of 2.20 in the second type of site conditions in Yunnan region; gives the attenuation relation formula under the second type of site conditions, obtains the response spectrum curves of the descending segments and attenuation equations, and finally puts forward the suggested formula of the three-segment vertical ground vibration design response spectrum in Yunnan region. Vertical ground vibration design response spectrum three-segment formula is proposed. The results show that the proposed response spectrum can effectively reflect the seismic characteristics of Yunnan region, and is applicable to the design requirements under different site categories and epicentre distances.