合肥城区基于抗倒塌的地表地震动峰值加速度研究

Study on Peak Acceleration of Ground Motion Based on Collapse Resistance in Hefei Urban Area

根据合肥城区地貌及第四系分布特征,选取了36个典型钻孔,运用一维等效线性方法,对三种不同超越概率条件下地震动参数进行计算,并对峰值加速度放大系数以及罕遇地震动与基本地震动放大倍数的规律进行研究。结果表明:覆盖层厚度、地貌特征、土层结构对地表地震动峰值加速度及其放大系数的影响显著,且存在一定规律性。

According to the geomorphology and the Quaternary distribution characteristics of Hefei urban area,36 typical boreholes are selected,and the one-dimensional equivalent linear method is used to calculate the ground motion parameters under three different exceedances probability conditions,and the peak acceleration amplification coefficient and the law of rare ground motion and basic ground motion amplification are studied.The results show that the overburden thickness,geomorphic features and soil structure have significant effects on the peak acceleration and amplification coefficient of ground motion,and there is a certain regularity.