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| 既有倾斜砌体结构地震响应分析 |
| Seismic Response Analysis of Existing Inclined Masonry Structures |
| 投稿时间：2026-03-18 修订日期：2026-05-28 |
| DOI： |
| 中文关键词: 既有砌体结构 整体倾斜 时程分析 振动台试验 抗震性能 |
| 英文关键词: existing masonry structures overall inclination time-history analysis shaking table test seismic performance |
| 基金项目:2024年度安徽省住房和城乡建设厅科学计划项目:地基大变形下房屋结构安全及抗震性能研究(2024-YF075) |
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| 中文摘要: |
| 既有砌体结构因长期服役易受材料劣化、地基不均匀沉降等因素影响产生整体倾斜，传统评估方法常导致过度加固或误判拆除，亟待建立科学的评估体系。以铜陵某6层倾斜砌体住宅楼为研究对象，通过结构实体检测、沉降观测及地质勘察，确定地基不均匀沉降为房屋倾斜的主要原因。利用SAP2000软件建立有限元模型，对倾斜结构的承载力及抗震性能进行验算；设计1:4缩尺振动台试验，验证纠偏后结构的抗震性能。结果表明:该住宅楼上部结构主要承载力满足规范要求；6度罕遇地震作用下的时程分析显示，结构最大层间位移角为1/2018，小于砌体结构“中等破坏”性能水准对应的限值1/900；振动台试验中，结构在6度多遇至罕遇地震作用下自振频率无变化，未出现可见裂缝及明显损伤。 |
| 英文摘要: |
| Existing masonry structures are prone to overall inclination under the influences of material deterioration, uneven foundation settlement and other factors after long-term service. Traditional evaluation methods often result in over-reinforcement or misjudged demolition, thus it is urgent to establish a scientific evaluation system. Taking a 6-story inclined masonry residential building in Tongling as the research object, the main cause of the building inclination was determined to be uneven foundation settlement through structural entity detection, settlement observation and geological investigation. A finite element model was built by using SAP2000 software to check the bearing capacity and seismic performance of the inclined structure; a 1:4 scale shaking table test was designed to verify the seismic performance of the structure after rectification. The results show that the main bearing capacity of the superstructure of this residential building meets the requirements specified in the codes. Time-history analysis under the action of rare earthquake of intensity 6 reveals that the maximum interstory drift angle of the structure is 1/2018, which is smaller than the limit value of 1/900 corresponding to the "moderate damage" performance level of masonry structures. In the shaking table test, the natural vibration frequency of the structure remains unchanged under the action of frequent to rare earthquakes of intensity 6, and no visible cracks or obvious damages are found on the structure. |
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