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作为场地条件之一的土层特性(土层结构、土动力参数)对地表地震动参数的影响研究是一项具有重要理论和工程应用意义的研究课题。选择汶川地震强震区典型的钻孔资料和强震记录,以北川县城地勘标准孔和安县塔水波为基础,运用土层等效线性化程序计算了140个工程场地计算剖面,定量分析了土层特性改变对反应谱αmax、Tg及地震影响系数差△α影响的特点及规律。
The study on the influence of soil characteristics (soil structure and soil dynamic parameters) as one of the site conditions on the ground motion parameters is a subject of great theoretical and engineering significance. Based on the typical borehole data and strong earthquakes recorded in the strong earthquakes in Wenchuan earthquake, based on the standard boreholes in Beichuan county and the tower waves in Anxian County, the calculated cross sections of 140 engineering sites were calculated using the equivalent linearization procedure of soil layers. Characteristics and laws of the influence of the change of soil properties on the response spectrum α max, Tg and the difference Δα of the earthquake influence coefficient.