| 2021年青海玛多7.4级地震典型建筑震害对比及讨论 |
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| 引用本文： | 刘炜,,张昊宇,黄勇,汪云龙,管仲国.2021年青海玛多7.4级地震典型建筑震害对比及讨论[J].世界地震工程,2021,0(3):057-64. |
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| 作者姓名： | 刘炜 张昊宇 黄勇 汪云龙 管仲国 |
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| 作者单位： | 1. 青海省地震局, 青海 西宁 810001;2. 青海格尔木青藏高原内部地球动力学野外科学观测研究站, 格尔木 816000;3. 中国地震局工程力学研究所 地震工程与工程振动重点实验室, 黑龙江 哈尔滨 150080;4. 同济大学, 上海 200082 |
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| 摘 要： | 青海玛多7.4级地震发生后，本文作者随科考队开展了典型工程的震害调查。本文报道了黄河乡江旁村和昌马河工区这2个典型调查点的建筑震害情况。调查表明:邻近微观震中的黄河乡建筑震害程度相对较轻，主要表现为部分房屋落瓦，砖混结构少数承重墙及框架结构部分隔墙开裂，土木结构房屋部分严重破坏，部分围墙倒塌；而距微观震中以东85 km的昌马河工区建筑震害则相对较重:无抗震措施的砖木结构房屋全部严重破坏或倒塌，具备合理抗震措施的砖混结构基本完好或轻微破坏，在建轻钢厂房均钢柱倾斜、维护墙明显开裂并且围墙多数倒塌。调查分析表明:造成两地震害差异的主要原因为抗震措施差异以及地表破裂和砂土液化影响:黄河乡多数房屋具备合理抗震措施，昌马河工区多数民居缺少抗震措施；昌马河工区附近发现疑似地表破裂痕迹，而紧邻黄河乡的河岸发现砂土液化迹象。这表明昌马河工区的地震作用中类似近场的高频能量可能较多，而黄河乡地区则因砂土液化使得高频地震动作用有所降低，由此造成两地震害程度与震中距呈现反差关系。
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| 关 键 词： | 玛多地震 建筑震害 抗震措施 砂土液化 |
Investigation and discussion of the building seismic damageafter Qinghai Maduo Ms 7.4 earthquake in 2021 |
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| LIU Wei,' target="_blank" rel="external">,ZHANG Haoyu,HUANG Yong,WANG Yonglong,GUAN Zhongguo.Investigation and discussion of the building seismic damageafter Qinghai Maduo Ms 7.4 earthquake in 2021[J].World Information On Earthquake Engineering,2021,0(3):057-64. |
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| Authors: | LIU Wei " target="_blank">' target="_blank" rel="external"> ZHANG Haoyu HUANG Yong WANG Yonglong GUAN Zhongguo |
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| Institution: | 1. Qinghai Earthquake Agency, Xining 810001, China;2. Field Scientific Observation Station for Geodynamics of the Interior of the Qinghai-Tibet Plateau, Golmud 816000, China;3. Key Laboratory of Earthquake Engineering and Engineering Vibration, Institute of Engineering Mechanics, CEA, Harbin 150080, China;4. Tongji University, Shanghai 200082, China |
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| Abstract: | A seismic reconnaissance survey has been conducted after Maduo Ms7.4 earthquake in Qinghai China. This paper reports the seismic damage of Jiangpang Village of Huanghe Township and Changmahe area. Investigation shows that the seismic damage of buildings in Jiangpang Village, which is close to the microscopic epicenter, is relatively light: some masonry-timber houses fallen tiles, a few brick walls of brick-concrete structure and some partition walls of frame structures cracked, some raw-soil structures severely damaged and some courtyard walls collapsed. While the residential buildings in Changmahe Industrial Area, 85 kilometers east of the microscopic epicenter, was relatively severely damaged by the earthquake: the masonry-timber structures without aseismic measures were severely damaged or collapsed, the masonry-concrete structures with aseismic measures were basically intact or slightly damaged. Some steel columns of the light steel workshops under construction are inclined, most courtyard walls collapsed. According to the investigation, the aseismic measures of the buildings and the sand liquefaction are the two main factors for the damage difference of these two settlements: most buildings in Huanghe Township are constructed with aseismic resistance measures, while most residential houses in Changmahe Area do not have aseismic resistance measures. Earthquake surface ruptures were found near the Changmahe Area, while sand liquefaction were found on the banks of the Huanghe Township, indicating that the Changmahe Area may have suffered near-field high frequency earthquake action, while the high-frequency ground motion area reduced by the sand liquefaction in the Yellow River Township. |
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| Keywords: | Maduo earthquake building damage aseismic measures sand liquefaction |
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