摘要
2013年4月20日,四川省芦山县境内发生了Ms7.0强震,地震诱发了大量的滑坡,有些滑坡甚至造成了严重的灾害。本文基于Newmark位移理论,利用芦山地震的强震动记录和地震滑坡点分布数据估算了研究区域斜坡的临界加速度值,并利用经验地震滑坡位移衰减关系计算获得了芦山地震滑坡位移衰减分布,综合考虑了地形坡度及地形起伏度因素,采用极大值标准化方法将三因素进行归一化处理后,在地理信息系统环境下实现了多参数的叠加分析,获得了芦山地震滑坡危险性分布评估图,并通过实际滑坡分布验证了方法的合理性。本方法可为震后地质灾害快速评估以及震后应急救援决策提供参考。
The Lushan earthquake on April 20,2014 induced a large number of landslides and some of the landslides resulted in serious hazards. Based on Newmark method,the critical accelerations were calculated with the data of strong motion records. The map of Lushan seismic landslide displacement attenuation was gained by the experience formula. Taking consideration of slope angle and relief amplitude to achieve a multi-parameter superposition analysis,three factors were normalized by maximum value standardization method in GIS environment. Finally,hazard distribution map of earthquake induced landslide for the Lushan region was obtained. The method is helpful in earthquake damage assessment and emergency relief work.
出处
《地震工程与工程振动》
CSCD
北大核心
2014年第S1期983-987,共5页
Earthquake Engineering and Engineering Dynamics
基金
中国地震局工程力学研究所基本科研业务费专项(2011B06)
公益性行业科研专项(201108003)资助
关键词
芦山地震
滑坡
评估
Lushan earthquake
landslide
assessment
