Dataset: Italian seismic amplification factors for peak ground acceleration and peak ground velocity

Ground motion modification over large areas is generally evaluated by focusing on source effects disregarding local lithostratigraphic site conditions. Hence, amplification maps of peak ground acceleration and peak ground velocity are proposed to improve the forecast of ground motion on a national scale. Topological information about litho-type successions and soil mechanical behaviour were retrieved from the Italian database of seismic microzonation and more than 30 million of seismic site response analyses were performed to quantify the amplification factors (i.e. the ratio between expected ground motion at the site of interest and that at the outcropping engineering bedrock). The maximum value of the amplified peak ground acceleration on the Italian territory results in about twice as much as the value expected at the outcropping of the engineering bedrock. Finally, damage scenario maps based on the amplified ground motion could be produced as a supporting tool for urban planning and emergency system management.

在大面积范围内，地动修正通常通过关注源效应而忽视局部岩层地层条件进行评估。因此，提出了峰值地面加速度和峰值地面速度的放大图，以改善全国范围内地面运动的预测。从意大利地震微区划数据库中检索了岩性层序和土壤力学行为的拓扑信息，并执行了超过三千百万次的地震场地反应分析，以量化放大系数（即关注地点预期地面运动与露出地表的工程基岩地面运动的比值）。在意大利领土上，放大后的峰值地面加速度的最大值约为露出地表工程基岩预期值的两倍。最终，基于放大地面运动的损害情景图可作为城市规划与应急系统管理的辅助工具。