甘肃积石山M_(S)6.2地震高烈度区震害特征及机理分析  

Characteristics and mechanism of seismic damage of residential buildings in high-intensity areas of Jishishan M_(S)6.2 earthquake

作　　者：岳峰[1,2] 董建华 董鹏飞[3] 范国涛 张虎 YUE Feng;DONG Jianhua;DONG Pengfei;FAN Guotao;ZHANG Hu(Key Laboratory of Disaster Prevention and Mitigation in Civil Engineering of Gansu Province,Lanzhou University of Technology,Lanzhou 730050,Gansu,China;Western Engineering Research Center of Disaster Mitigation in Civil Engineering of Ministry of Education,Lanzhou University of Technology,Lanzhou 730050,Gansu,China;Lanzhou GongDa Engineering Testing Technology Co.,Ltd.,Lanzhou 730050,Gansu,China)

机构地区：[1]兰州理工大学甘肃省土木工程防灾减灾重点实验室,甘肃兰州730050 [2]兰州理工大学西部土木工程防灾减灾教育部工程研究中心,甘肃兰州730050 [3]兰州工大工程检测科技有限公司,甘肃兰州730050

出　　处：《地震工程学报》2024年第4期759-767,共9页China Earthquake Engineering Journal

基　　金：国家自然科学基金面上资助项目(52178335)。

摘　　要：2023年12月18日甘肃积石山县发生M_(S)6.2地震,地震导致震中附近受灾严重,尤其以典型民居震害最为普遍和严重,对于研究典型民居震害机理具有警示意义。为研究典型民居的震害机理,通过震后第一时间的震害现场调查,获得典型民居破坏的第一手资料。针对破坏最为普遍的砖木房屋和砖混房屋作出宏观震害分析,并建立三维有限元数值模型,分析地震作用下两类房屋应力、应变的响应特性,揭示典型民居的地震破坏机理,并给出抗震建议。结果显示,地震作用下砖木房屋和砖混房屋主要以墙体破坏为主,在门窗部位及结构连接处均存在应力集中或应变增大现象,是造成民居震害的重要原因,加强对应力集中部位的抗震措施是减轻灾害的重要途径。研究结果对农村新建房和地震灾后重建具有指导意义。On December 18,2023,the M_(S)6.2 earthquake in Jishishan County,Gansu Province,resulted in serious disasters near the epicenter,wherein the most extensive and severe damage occurred in typical residential buildings,revealing the importance of warning for studying the earthquake damage mechanism.The first-hand data were investigated immediately after the earthquake to examine the earthquake damage mechanism of typical dwellings.The macroscopic earthquake damage of commonly damaged brick-wood and brick-concrete houses was analyzed.A three-dimensional finite element numerical model was established to reveal the stress-strain response characteristics of the two kinds of houses under earthquake and the earthquake mechanism of typical dwellings.The anti-seismic recommendations were also provided.Results show that,under the action of an earthquake,the damage to brick-wood and brick-concrete houses is mainly concentrated in the walls.The damage to residential buildings is mainly attributed to the increase in stress concentration and strain on doors,windows,and structural connections.Therefore,strengthening earthquake-resistant measures in areas of high stress concentration is crucial to mitigating disasters.The results are beneficial to the construction of new rural houses and post-earthquake reconstruction.

关 键 词：积石山地震 民居震害 破坏特征 震害机理 数值分析 

分 类 号：TU312.3[建筑科学—结构工程]