基于三维图像模式识别的西藏东南部地震灾害损失风险评估

本文在对西藏东南部各县的建筑类型、数量、易损性调查的基础上,对不同类型的建筑建立了模式类向量,使用三维图像模式识别技术估计了各类型建筑在西藏东南部各县市的数量分布,建立了不同建筑物的结构易损性和人口易损性模型,并且估算了西藏东南部各县在遭遇一次设定地震时的损失分布和基于危险性的未来50年可能的损失分布情况.本文研究表明,若曲松—桑日发生7.5级地震,可能造成拉萨、山南两市较重的人员伤亡,其中曲松县和乃东区伤亡最重.西藏东南部未来50年建筑地震风险最高的地区是拉萨市区、林芝市区和错那县,其中拉萨市区的建筑财产损失风险最高.

Seismic disaster loss risk assessment for southeastern Tibet based on 3D image pattern recognition

This paper investigated the numbers, types, and vulnerability of the buildings in Southeastern Tibet and built pattern classes for difference types of buildings. Then we assessed the distribution of each type of buildings in every town based on 3D image pattern recognition, and made an event-based and a 50-year hazard-based seismic risk assessment for the towns in Southeastern Tibet. Our study indicated that if an M7.5 earthquake happened in Qusong-Sangri, it may cause serious casualties in Lhasa and Shannan area. The town of Qusong and Naidong may have the most casualties. Areas with the highest seismic risk are urban areas of Lhasa and Nyingchi and Cuona Town, and urban Lhasa has the highest seismic risk of building structural economic losses.