摘要
本文根据黄土地区部分场地的实际情况和条件,建立了综合考虑土层的波速、深度和土性相互间关系的非均质场地土层模型。并通过由地基下部基岩处输入实际地震记录,运用层状介质体系地震反应分析法,对所建立的黄土地层中存在不同深度软弱夹层的情况进行地震反应模拟分析,从中归纳出软弱夹层处于不同深度及相邻土层刚度变化时,对地面地震反应影响的有关规律性。
Based on the real site conditions in the loess area, a model for the soil layers of heterogeneous site is established considering the relationship among the shear wave velocity, the depth and the property of soil layers. Inputing the real seismic data of bedrock and using the seismic response method for layered media system, the simulation analysis of the seismic response is carried out respectively for the loess sites with the soft layer in different depth from ground surface. The analysis results are discussed to demonstrate the effect of soft soil layer in different depth and the dynamic rigidity of its neighbouring soil layers on the seismic response of the-ground surface, and some conclusions are given.
关键词
黄土
地震
地面运动
动力特性
loess, earthquake, dynamic characteristics, frequency spectrum/ground motion, response spectrum
