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βmax、Tvg、γ,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。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 βmax, Tvg, γ, 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.
近年来,竖向地震动的影响越来越被人们重视。特别是对于大跨度及超高层结构来说,其抗震设计中需要考虑到竖向地震动影响。国内外各个学者也对竖向地震动进行了深入的研究。目前普遍认为竖向加速度反应谱统计平均值在与水平加速度反应谱的1/2~2/3之间。但实际上影响竖向加速度反应谱的因素众多且关系复杂,在某些特定的地质以及震源条件下甚至会超过规范规定的50%。本文回顾了国内外对竖向设计反应谱的研究现状,对目前的研究进行了总结,发现竖向设计反应谱的基本研究方式是从竖向地震动的预测方程和V/H谱值比两方面入手。同时比较了各个方法的优劣,并给出了竖向设计反应谱的数据处理过程,为以后的竖向地震设计反应谱的深入研究提出一些参考。In recent years, people pay more and more attention to the influence of vertical ground motion. Especially for large-span and super high-rise structures, the vertical seismic effect should be considered in the seismic design. Scholars at home and abroad have also conducted in-depth research on vertical ground motion. At present, it is generally considered that the statistical average value of vertical acceleration response spectrum and horizontal acceleration response spectrum is between 1/2~2/3. But in fact, there are many factors that affect the response spectrum of vertical acceleration, and the relationship is complex. In some specific geological and focal conditions, it will even exceed 50% of the standard. This paper reviews the research status of vertical design response spectrum at home and abroad, summarizes the current research and finds that the basic research methods of vertical design response spectrum are from the prediction equation of vertical ground motion and V/H spectrum value ratio. At the same time, the advantages and disadvantages of each method are compared, and the data processing process of the vertical design response spectrum
