摘要
2025年1月7日,西藏自治区日喀则市定日县发生6.8级地震,为了解地震中当地公共建筑的震害情况,震后一周对定日县措果乡(9度区)、长所乡(9度区)和曲洛乡(8度区)的14栋公共建筑进行了现场调查。从主体结构、外立面墙体、室内填充墙、楼梯间、吊顶系统和室内设备等6个方面,总结了公共建筑在本次地震中的震害特征,分析了震损原因。调查结果表明:对于经过正规抗震设计的钢筋混凝土框架结构,其结构构件基本完好或轻微损伤,表现出良好的抗震性能;但建筑非结构构件破坏严重,且集中在外立面墙体、室内填充墙、楼梯间墙体、吊顶系统以及建筑内部设备等;不同构件之间的相互挤压加重了各构件的损伤程度。根据本次地震中公共建筑的震害特征及震损原因,建议重点排查设防烈度较高地区公共建筑中各类非结构构件的构造措施是否满足相关规范要求;加强非结构构件与主体结构的连接,提高非结构构件的抗震性能,避免因非结构构件破坏造成人员伤亡和建筑使用功能中断。
On January 7,2025,an M_(s)6.8 earthquake occurred at Dingri County,Shigatse City,Xizang Autonomous Region.To understand the seismic damage of local public buildings in the earthquake,14 public buildings in Cuoguo Town(intensity 9),Changsuo Town(intensity 9)and Quluo Town(intensity 8)of Dingri County were investigated in one week after the earthquake.The typical seismic damage characteristics were summarized and the causes of damage of the public buildings were analyzed.The analysis covered the main structure,exterior facade wall,interior infilled wall,stairwell wall,suspended ceiling system and building-inside equipment.The investigation results indicate that the structural components of the reinforced concrete frame structures with proper seismic design are basically undamaged or suffer slight damage,which shows good seismic performance.However,the non-structural components inside the building are severely damaged,and the damage concentrates on the exterior facade wall,interior infilled wall,stairwell wall,suspended ceiling system and buildinginside equipment.In addition,the interaction between different components aggravates the seismic damage degree of these components.Based on the seismic damage characteristics and causes of the damage,it is suggested to focus on whether the structural measures of various non-structural components in public buildings of high intensity areas meet the requirements of the seismic design codes,and strengthen the connection between non-structural components and the main supporting structure to improve their seismic performance,and avoid casualties and building functionality interruption caused by damage of non-structural components.
作者
尚庆学
周中一
SHANG Qingxue;ZHOU Zhongyi(Key Laboratory of Earthquake Engineering and Engineering Vibration,Institute of Engineering Mechanics,China Earthquake Administration,Harbin 150080,China;Key Laboratory of Earthquake Disaster Mitigation,Ministry of Emergency Management,Harbin 150080,China;Department of Civil Engineering,Tsinghua University,Beijing 100084,China)
出处
《建筑结构学报》
北大核心
2025年第11期34-45,共12页
Journal of Building Structures
基金
国家重点研发计划(2022YFC3803000)
中国地震局工程力学研究所基本科研业务费专项(2024B27)。
关键词
公共建筑
框架结构
非结构构件
砌体填充墙
吊顶系统
震害特征
public building
frame structure
non-structural component
masonry infilled wall
suspended ceiling system
seismic damage feature
