Seismic vulnerability of dwellings at Sete Cidades Volcano (S. Miguel Island, Azores)
Seismic vulnerability of dwellings at Sete Cidades Volcano (S. Miguel Island, Azores)
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Sete Cidades 火山（亚速尔群岛圣米格尔岛）住宅的地震脆弱性
DOI：
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发表时间：
2006
期刊：
影响因子：
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通讯作者：
G. Queiroz
中科院分区：
文献类型：
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作者：
A. Gomes;J. Gaspar;G. Queiroz
抽象的。自从15世纪S·米格尔岛(亚速尔群岛)定居以来，几次地震在岛上造成了重大的人员损失和严重的破坏。塞特西达斯火山区位于岛的最西端，是由构造和火山成因的强烈地震危机形成的，该地区发生的重大地震达到历史最大烈度IX(1998年欧洲宏观地震等级)。为了评估未来一次大地震的影响，在位于塞特西达斯火山两侧的蓬塔德尔加达县的10个教区进行了实地调查，火山内部是火山口。总共确定了7019栋建筑物，其中4351栋被确认为住宅。研究区域的居民总数为11429人。在这项工作中，使用EMS-98的结构类型表，根据亚速尔群岛建造的建筑类型，根据住宅的地震易损性(A至F级)对住宅进行了分类。结果表明，76%(3306)的房屋属于A类房屋，17%(740)房屋属于B类房屋，属于易损性较高的类别。如果该地区受到9度地震的影响，估计57%(2480)至77%(3350)的房屋将部分或全部倒塌，15%(652)至25%(1088)将需要修复。在这种情况下，考虑到每个教区的平均每户居民，82%(9372人)至92%(10515人)的人口将受到影响。死亡、受伤和流离失所的人数将给民防当局带来严重问题，并将在整个群岛造成社会和经济混乱。
Abstract. Since the settlement of S. Miguel Island (Azores), in the XV century, several earthquakes caused important human losses and severe damages on the island. Sete Cidades Volcano area, located in the westernmost part of the island, was attained by strong seismic crises of tectonic and volcanic origin and major events reached a maximum historical intensity of IX (European Macroseismic Scale 1998) in this zone. Aiming to evaluate the impact of a future major earthquakes, a field survey was carried out in ten parishes of Ponta Delgada County, located on the flanks of Sete Cidades volcano and inside it is caldera. A total of 7019 buildings were identified, being 4351 recognized as dwellings. The total number of inhabitants in the studied area is 11429. In this work, dwellings were classified according to their vulnerability to earthquakes (Classes A to F), using the structure types table of the EMS-98, adapted to the types of constructions made in the Azores. It was concluded that 76% (3306) of the houses belong to Class A, and 17% (740) to Class B, which are the classes of higher vulnerability. If the area is affected by a seismic event with intensity IX it is estimated, that 57% (2480) to 77% (3350) of the dwellings will partially or totally collapse and 15% (652) to 25% (1088) will need to be rehabilitated. In this scenario, considering the average of inhabitants per house for each parish, 82% (9372) to 92% (10515) of the population will be affected. The number of deaths, injured and dislodged people will pose severe problems to the civil protection authorities and will cause social and economic disruption in the entire archipelago.