摘要
针对2021年5月21日云南漾濞6.4级地震,开展了现场震害调查、余震观测及地震动和房屋震害特征分析,总结了地震影响区特别是极震区房屋的震害特点,探讨了房屋震害特征与地震动特性的关联性,揭示了场地地形条件及地震动方向性对房屋震害特征和分布的影响特点与机理.研究表明,由于存在场地地形放大效应,山腰陡坎和山顶处的房屋震害相对山脚均有不同程度的加重;地震动的方向性效应是房屋在不同朝向表现出破坏程度差异性的主要原因.通过总结此次地震的震害经验,提出了提高云南地区土木结构房屋抗震性能的措施建议.
After the M_(s)6.4 earthquake in Yangbi,Yunnan,on May 21,2021,the seismic damage survey,mobile strong motion observation of aftershocks,and characteristic analysis of ground motion and building damage were carried out.The characteristics of building damage in the earthquake-stricken region especially in the meizoseismal area were summarized,the correlation between the building damage and the ground motion characteristics was explored,the effect and mechanism of topographic condition and ground motion directivity on the building seismic damage characteristics and disaster distribution were revealed.Due to the topographic effect of local site,buildings located on the steep slope and the top of mountains were encountered more severe damage than those on the mountain foot.The directivity effect of ground motion is the main reason for the damage difference of buildings with different orientations.By summarizing the seismic damage characteristics in this earthquake,measurements and suggestions for improving the seismic performance of the mud and wood houses in Yunnan Province were proposed.
作者
李小军
孙晓燕
荣棉水
张斌
王继鑫
傅磊
王玉石
LI Xiaojun;SUN Xiaoyan;RONG Mianshui;ZHANG Bin;WANG Jixin;FU Lei;WANG Yushi(Key Laboratory of Urban Security and Disaster Engineering of China Ministry of Education,Beijing University of Technology,Beijing 100124,China;Institute of Geophysics,China Earthquake Administration,Beijing 100081,China)
出处
《应用基础与工程科学学报》
EI
CSCD
北大核心
2023年第3期650-662,共13页
Journal of Basic Science and Engineering
基金
国家自然科学基金项目(51878625)
中央级公益性科研院所基本科研业务费专项(DQJB21Y42)
关键词
漾濞地震
房屋震害调查
强震动观测
地震动记录
场地条件
地形效应
地震动方向性
Yangbi earthquake
building damage survey
strong motion observation
strong motion record
site condition
topographical effect
ground motion directivity
