基于遥感影像和点密度的房屋年代分析及震害预测  

Building age estimation and seismic damage prediction based on remote sensing image and point density

作　　者：朱志忠 陆吉赟 李敏 赵宇[1] ZHU Zhizhong;LU Jiyun;LI Min;ZHAO Yu(College of Civil Engineering and Architecture, Zhejiang University, Hangzhou, Zhejiang 310058, China;Zhejiang Earthquake Agency, Hangzhou, Zhejiang 310007, China)

机构地区：[1]浙江大学建筑工程学院,浙江杭州310058 [2]浙江省地震局,浙江杭州310007

出　　处：《江苏大学学报（自然科学版）》2020年第4期382-386,404,共6页Journal of Jiangsu University：Natural Science Edition

基　　金：浙江省重点研发计划项目(2018C03045)。

摘　　要：老旧城区的地理信息数据库中通常缺少房屋年代信息,无法满足震害预测的需求.为了快速获取老城区房屋年代情况,选定浙江省嘉兴市2.5 km^2老城区为研究区,借助高分辨率遥感影像,通过目视解译的方法将研究区分割成多个由相似房屋构成的单元,定义单元点密度概念;通过房屋的年代和单元点密度的统计关系,提出利用单元点密度分析房屋年代的方法.利用震害因子法,选择结构型式、层数、设防烈度、建成年代4个震害因子,基于ArcGIS软件,计算震害指数进行震害预测,三维呈现出研究区的震害预测结果.结果表明:单元点密度与房屋年代有近似线性负相关的拟合关系,相关系数为0.7932,基于此关系通过计算单元点密度可推算房屋年代.The geographic information system(GIS)database of old urban areas often lack the information of building age,which makes it difficult for seismic damage prediction.In order to obtain the building age in short time,the old urban area(about 2.5 km^2)of Jiaxing city in Zhejiang province was investigated.High-resolution remote sensing image was utilized to obtain the regions consisting of similar houses through visual interpretation.The region point density was defined to estimate the building age.Based on the statistical relationship between building age and point density,a method was proposed to estimate the approximate age of buildings by point density.The seismic damage index was calculated to assess the seismic damage with the considerations of attributes including structure,floor,fortification and age,and the result of seismic damage prediction was illustrated three-dimensionally.The results show that there is inversely linear correlation between region point density and building age with R2 of 0.7932,and the building age can be rapidly estimated by calculating the point density of region.

关 键 词：老城区 震害预测 遥感影像 房屋年代 单元点密度 地理信息数据系统 

分 类 号：P315.7[天文地球—地震学]