通过对2022年6月10日马尔康MS 6.0地震震群灾区实地调查,确定了此次地震的烈度分布,灾区最高烈度为Ⅷ度,灾区面积5 719 km2。灾区内调查的77个房屋建筑点主要为藏式石木结构、砖混结构、钢筋混凝土框架结构。对各烈度区内不同结构类型房屋的震害现象进行了整理,分析了不同结构类型房屋的抗震能力与震害原因。结果显示:①藏式石木结构房屋占比最大且破坏最严重,该结构房屋建造材料、工艺较差,在高烈度区房屋震害主要表现为倒塌或局部垮塌现象;②砖混结构房屋抗震性能较好,在高烈度区房屋震害主要表现为“X”型剪切或贯穿性裂缝,破坏严重的房屋多是无圈梁和构造柱的未设防砖混结构;③钢筋混凝土框架结构房屋抗震性能较好,在此次地震中主体结构完好,但在高烈度区房屋震害主要表现为填充墙明显裂缝和装饰层脱落。
Based on the field survey of the Maerkang MS 6.0 earthquake area on June 10, 2022, the seismic intensity distribution was determined. The disaster area covered 5 719 km2, with the highest intensity of Ⅷ degrees (8 degrees). A total of 77 housing constructions were identified in the disaster area, includingTibetan stone and wood structures, brick and concrete structures, and reinforced concrete frame structures. The earthquake damage of each structural types of housing in various intensity areas was analyzed, and the aseismic ability of different structural types of houses and the causes of earthquake damage were examined.①The Tibetan stone and wood structure houses, which make up the largest proportion of the housing constructions, suffered the most serious damage. The construction materials and techniques used in these structures are poor, resulting in collapse or partial collapse in the high-intensity area. ②Brick and concrete buildings demonstrated good seismic performance, but the serious damage was mostly found in unfortified brick and concrete buildings without ring beams and structural columns, which were characterized by X-type shear or penetrating crack.③The reinforced concrete frame structure showed good seismic performance, and the main structure remained intact in this earthquake. However, in the high-intensity area, the main damage of the building was manifested in obvious cracks in the filling wall and the falloff of the decorative layer.
2023,44(1): 28-35 收稿日期:2022-09-20
DOI:10.3969/j.issn.1003-3246.2023.01.004
基金项目:四川省地震局地震科技专项(项目编号:LY2211);国家重点研发计划课题“基于物联网的准实时地震灾情感知与决策支持系统研发”(项目编号:2019YFC1509402);四川地震科技创新团队专项(项目编号:201902);国家重点研发计划课题“示范区数据资源整合及数据库建设”(项目编号:2019YFC1509405-02)
作者简介:梁远玲(1994-),女,助理工程师,主要从事地震应急、GIS工程与遥感技术应用研究工作。E-mail:554164119@qq.com
*通讯作者:肖本夫(1986-),男,工程师,主要从事地震应急、地震地质与数字地震学研究工作。E-mail:xiaobf_1986@163.com
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