基于RAGA-PP模型的城市应急避难场所适宜性分析  

Analysis of the Suitability of Urban Emergency Shelter Based on RAGA-PP Model

作　　者：刘朝峰 杜金泽 张嘉鑫 王志涛[2] LIU Chaofeng;DU Jinze;ZHANG Jiaxin;WANG Zhitao(School of Civil and Transportation Engineering,Hebei University of Technology,Tianjin 300401,China;Institute of Earthquake Resistances and Disaster Reduction,Beijing University of Technology,Beijing 100124,China)

机构地区：[1]河北工业大学土木与交通学院,天津300401 [2]北京工业大学抗震减灾研究所,北京100124

出　　处：《灾害学》2020年第2期80-84,共5页Journal of Catastrophology

基　　金：中国地震局工程力学研究所基本科研业务费专项资助项目(2019EEEVL0501);国家自然科学基金项目(51678017,51908025);河北省自然科学基金项目(E2019202470);河北省高等学校科学技术研究项目(QN2018094)。

摘　　要：为定量评价城市应急避难场所的防灾适宜性,从有效性、可达性、安全性3个方面构建避难场所适宜性评价指标体系,针对服务有效性指标进行距离非线性衰减变换处理,并采用实数编码加速遗传算法(RAGA)优化投影寻踪(PP)模型,分析不同地震影响下应急避难场所的适宜性。结果表明:不同地震烈度下,避难场所的适宜性投影值降低,划分到不同适宜性等级的避难场所数量变化不大;1、19#避难场所为极适宜场所,26、33、34#避难场所为不适宜场所;对于该城市的避难场所,场地地形坡度、步行可达性、可容纳人数、淹没深度对其适宜性的影响较大。For quantitatively evaluating the suitability of urban emergency shelters, the suitability evaluation index system of urban emergency shelters is constructed from three aspects: effectiveness, accessibility and safety.The distance nonlinear attenuation transform is applied to service effectiveness index.Real coded accelerated genetic algorithm(RAGA) is used to optimize the projection pursuit(PP) model, and the suitability of emergency shelters under different earthquake effects is analyzed.The results indicated that the projection value of suitability of shelters decreased under different seismic intensification.There is little change in the number of shelters classified into different suitability levels.The suitability of Shelter 1 and 19 are the highest, while the suitability of Shelter 26, 33 and 34 are the lowest.The terrain slope, walking accessibility, number of people and submerged depth have a great impact on the suitability of shelters.

关 键 词：应急避难场所 适宜性评估 可达性 地震烈度 投影寻踪 

分 类 号：TU984.11[建筑科学—城市规划与设计] P315[天文地球—地震学]