黄土场地抗震性能评价指标分析

    ANALYSIS ON THE ASSESSMENT INDEXES FOR SEISMIC RESISTANCE OF LOESS SITES

    • 摘要: 黄土地震滑坡、震陷以及饱和黄土液化是黄土地区主要的岩土地震灾害。本文结合黄土场地震害的特点,对其抗震性能进行了分类。通过对影响黄土斜坡抗震稳定性、黄土抗震陷和液化性能的主要因素的分析,初步建立了黄土场地抗震性能评价指标及不同地震烈度下场地划分结果。该方法在黄土地震灾害区划、一般工程场地的定性分析或初判等方面有一定的实用价值。

       

      Abstract: Seismic loess landslides, seismic subsidence and liquefaction are predominant seismic disasters in loess areas. Based on the seismic disasters characteristics of loess sites, this paper assesses seismic resistance of all the sorts of sites. Through analysis on the major indexes that affect seismic stability of slopes, loess subsidence resistance and liquefaction, the paper summarizes the assessment indexes for seismic resistance of loess sites, and provides the zoning of loess sites under different seismic intensities. This method is valuable for seismic loess disasters zoning, qualitative analysis and preliminary estimation of general construction sites.

       

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