Regularity research on the seismic response of characteristic parameters for ground motion peak to soil slope
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摘要: 本文随机选取了100条具有不同地震动峰值特征参数的地震动记录,通过基线校正、积分等方法获取每条地震动的峰值加速度(PGA)、峰值速度(PGV)和峰值位移(PGD)三个参数,进而基于有限元数值模拟,通过对比同一个观测点不同峰值特征参数的特性与不同观测点同一峰值特征参数的特性来研究土坡的地震响应规律,分析各地震动峰值特征参数与土坡地震响应的相关性。计算结果表明:PGA,PGV和PGD与土坡地震响应都具有良好的正相关性,其相关性系数平均值分别为0.868,0.981,0.926;PGV的相关性优于PGA和PGD,而PGD的相关性要稍好于PGA。因此在关于土坡稳定性评价中,建议采用PGV作为参数指标。Abstract: We randomly selects 100 ground motion records with different ground motion peak characteristic parameters, and obtains the peak ground acceleration (PGA), peak ground velocity (PGV) and peak ground displacement (PGD) of each ground motion through baseline correction and integration. Based on finite element numerical simulation, the seismic response law of soil slopes is studied by comparing the characteristics of different peak characteristic parameters of the same observation point with the characteristics of the same peak characteristic parameters of different observation points, and the analysis of the characteristics of seismic peak characteristic parameters and the seismic response of soil slope correlation. The calculation results show that PGA, PGV and PGD have a good positive correlation with the seismic response of the soil slope, and the average correlation coefficients are 0.868, 0.981, 0.926, respectively. The correlation of PGV is better than that of PGA and PGD, while the correlation of PGD is slightly better than PGA. Therefore, it is recommended to use PGV as a parameter index in the evaluation of soil slope stability.
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Keywords:
- earthquake /
- seismic response /
- slope /
- peak ground acceleration /
- peak ground velocity /
- peak ground displacement
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表 1 边坡土体参数
Table 1 Parameters for soil slop
参数 密度
/(kg·m−3)弹性模量
/MPa泊松比 黏聚力
/kPa内摩擦角
/°数值 2070 90.8 0.3 13.99 25 表 2 地震动峰值特征参数和边坡地震响应的相关系数
Table 2 The correlation coefficients between peak ground motion characteristic parameters and slope seismic responses
监测点位移 相关系数 ρ PGA PGV PGD P1位移 0.873 0.984 0.925 P2位移 0.874 0.978 0.922 P3位移 0.863 0.982 0.926 P4位移 0.861 0.980 0.928 P5位移 0.869 0.982 0.931 -
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