摘要
倾斜摄影建立的高分辨率三维模型,能够呈现建筑物立体视觉效果,便于对建筑物结构、墙体、门窗等详细破坏情况进行分析,弥补了传统遥感影像只能获取建筑物顶部信息的局限。2021年5月21日漾濞M_(S)6.4地震发生后,利用多旋翼无人机、采用倾斜摄影的方式拍摄了Ⅷ度区的苍山西镇花椒园村背阴坡小组建筑物多个角度影像,建模生成高分辨率三维模型,并对破坏最严重的某户民居的破坏情况和原因进行了分析,认为造成破坏加重的不利因素有:山体的放大效应、边坡的放大效应、多次地震震害叠加效应以及建筑墙体自身缺陷。
The high-resolution 3 D model created on the basis of the oblique photography is able to present stereovision effect of buildings,which facilitates analyzing the damages of structures,walls,doors,windows,etc.The 3 D model improves the traditional remote sensing images that can only obtain information of the roof of buildings.In the disastrous area in Yangbi County stricken by the 6.4-magnitude earthquake on May 21,2021,we used multi-rotor drones to take photos of the residential houses in Beiyinpo villagers’group in Huajiaoyuan Village,West Cangshan Town which located on the seismic Intensity 7 area.Further,we set up high-resolution 3 D models,and on the basis of our models,we analyzed the cause of the most severely damaged residential houses of a family in the Beiyinpo villagers’group.Thus,we identified several unfavorable factors that caused the aggravation of the damage to the houses:the magnifying effect of mountains,the amplification effect of the slope,the superimposition of multiple earthquake damage,and the defects of the buildings’walls.
作者
张方浩
杜浩国
张原硕
张建国
卢永坤
曹彦波
ZHANG Fanghao;DU Haoguo;ZHANG Yuanshuo;ZHANG Jianguo;LU Yongkun;CAO Yanbo(Yunnan Earthquake Agency,Kunming 650224,Yunnan,China)
出处
《地震研究》
CSCD
北大核心
2021年第3期481-489,共9页
Journal of Seismological Research
基金
国家重点研发计划“地震应急全时程灾情汇聚与决策服务技术研究(2018YFC1504505)”资助。
关键词
震害调查
倾斜摄影
高分辨率
漾濞M_(S)6.4地震
earthquake-damage investigation
oblique photography
high yesolution
the Yangbi 6.4 earthquake
