北川地震遗址震害建筑物遥感数字化保存与震害特征

发布时间：2018-10-17 17:29

【摘要】：2008年5月12日发生的Ms8.0级汶川大地震,致使北川老县城满目疮痍从而搬迁重建。北川老县城是汶川地震中破坏最为严重、震害类型最为全面多样的震区,地震遗址完整得保留了地震后的原始景象,泥石流、滑坡、堰塞湖等次生灾害类型丰富,建筑物受损倒塌形式多样,具有极高地科研价值与历史价值。露天的地震遗址受其他自然灾害的影响易随时间逐渐消失,为使地震遗址得以永久的保存,收集整理了汶川地震后北川老县城地震遗址的光学遥感、合成孔径雷达、激光雷达等多种数字化形式的遥感图像,分析了不同类型图像在北川老县城地震建筑物遗址数字化保存应用中的作用;同时为最大可能的发挥地震遗址遥感影像中建筑物破坏类型多样的作用,从多类型影像分析的角度,基于遗址丰富的数据资源,研究分析了不同震害程度建筑物在多源遥感图像中的表现特征与成像机理,为后续震害信息提取与评估研究数据支撑与理论依据。
[Abstract]:The Ms8.0 magnitude Wenchuan earthquake on May 12, 2008 left the old county town in Beichuan devastated and relocated and rebuilt. The old county town of Beichuan is the earthquake area with the most serious damage and the most comprehensive and diverse types of earthquake damage. The earthquake remains intact enough to retain the original scene after the earthquake, with rich types of secondary disasters such as debris flows, landslides, barrier lakes, etc. The damage and collapse of buildings are of great value in scientific research and history. Opencast seismic sites are easily affected by other natural disasters and gradually disappear over time. In order to make the seismic sites permanent, the optical remote sensing and synthetic aperture radar (SAR) of the earthquake sites in the old county town of Beichuan after the Wenchuan earthquake were collected and sorted out. The functions of different types of remote sensing images such as lidar in the digital preservation of seismic buildings in the old county town of Beichuan are analyzed. At the same time, in order to maximize the possible role of building damage types in remote sensing images of seismic sites, from the perspective of multi-type image analysis, based on the rich data resources of the site, The characteristics and imaging mechanism of buildings with different degrees of earthquake damage in multi-source remote sensing images are studied and analyzed, which can be used as the data support and theoretical basis for the subsequent information extraction and evaluation of earthquake damage.
【作者单位】：中国地震局工程力学研究所中国地震局工程与工程振动重点实验室;中国地震局地壳应力研究所地壳动力学重点实验室;
【基金】：国家自然科学基金(41374050)资助
【分类号】：P237;P315.9

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