Seismic hazard analysis of building structures for the Millin MS6.9 earthquake，Tibet
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摘要: 2017年11月18日，西藏自治区林芝市米林县发生MS6.9地震。本文以2017年9月中下旬中国地震局地球物理研究所西藏野外考察建筑资料为基础，分析林芝周边4个考察点的房屋建筑抗震性能以及震后房屋建筑和震区道路的震害情况。重点分析鲁朗扎西岗村、易贡堰塞湖堤、米林镇帮加村、波密县岗堆镇岗堆村等4个考察点的房屋建筑情况以及震后破坏情况。这几个考察点分别位于地震烈度的Ⅶ度区和Ⅵ度区外。并给出震区房屋建筑在未来抗震设防的意见。Abstract: An earthquake（MS6.9）occurred in Millin county, Nyingchi city, Tibet Autonomous Region on November 18, 2017. Based on the building material in the Tibet fieldwork investigated by the Institute of Geophysics, China Earthquake Administration in September 2017, we analyzed the building construction and anti-seismic performance in the earthquake area before and after the Millin earthquake. We focused on the housing construction and the damage after the earthquake in Zhaxigang village in Lulang town, Yigong lake embankment, Bangjia village in Millin town, Gangdui village in Gangdui town. These sites are located at the seismic intensity of Ⅶ and Ⅵ area. This paper also gave some seismic fortification suggestions for future earthquakes.
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Key words:
- building classification /
- Linzhi region /
- earthquake disaster
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图 4 鲁朗镇扎西岗村震前房屋建筑考察信息
（a）村里的一处土坯院墙，无抗震能力，还有村民居住；（b）一般村民院墙，有砖混院墙，也有砖泥混墙；（c）该房屋有100多年历史，房屋整体为砖混结构，墙体较厚，抗震能力较弱；（d）平措大院房屋，如图墙体较厚，屋内主要以木结构为主，有一定抗震能力；（e）平措大院屋顶是木质以及钢桁架屋顶，留有空间晾晒谷物；（f）村里的老旧房屋，无抗震能力
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[1] 中国地震局地震台网中心米林地震相关产出结果[DB/OL][2018-05-21]. http://www.cenc.ac.cn/cenc/dzxx/337560/index.html [2] 西藏自治区林芝市米林地震地震烈度图[DB/OL][2017-11-22]. http://www.xizdzj.gov.cn/action/pageUIshowNewsContent.action?id=9741 [3] 中国地震局地球物理研究所科考队. 中国地震局地球物理研究所2017年9月西藏野外房屋建筑考察资料[Z], 2017 [4] 中国地震局办公室.西藏林芝市巴宜区发生5.0级地震[DB/OL](2017-12-20)[2018-12-26]. http://www.cea.gov.cn/publish/dizhenj/464/515/20171220093949309547949/index.html -
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