| 建筑结构监测与抗震韧性评估 |
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| 引用本文： | 王飞,康现栋,刘影,陈宏宇.建筑结构监测与抗震韧性评估[J].震灾防御技术,2022,17(3):569-578. |
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| 作者姓名： | 王飞 康现栋 刘影 陈宏宇 |
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| 作者单位： | 北京市地震局, 北京 100080 |
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| 基金项目： | 地震科技星火计划项目（XH17001）；北京市地震局2022年面上项目（BJMS-2022002） |
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| 摘 要： | 建筑结构响应是有效反映结构动力特性的最直接参数，开展结构动力响应实时监测可为结构抗震韧性评估提供准确的地震动输入。本文基于非结构构件损失构建结构抗震韧性评估方法，研究确定位移敏感型和加速度敏感型非结构构件的易损性模型。选择某六层钢筋混凝土框架结构进行实时监测系统建设，基于监测数据开展结构抗震韧性评估。通过构建建筑信息模型（BIM），并在有限元分析软件OpenSees中建立结构弹塑性分析模型，利用实时监测数据实现结构模型更新，直至监测数据与模型分析结果一致。由于实时监测数据峰值较低，结构不会发生塑性变形，因此选择10条双向非脉冲地震动模拟实时监测地震记录。根据层间位移角和楼面加速度分布，开展结构功能损失评估，得到该建筑结构的抗震韧性得分。分析表明，该结构抗震性能较好，在遭受地震破坏后，会发生非结构构件脱落，需要采取有效措施进一步提升建筑抗震韧性水平。
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| 关 键 词： | 实时监测 模型更新 层间位移角 楼层加速度 抗震韧性 |
| 收稿时间： | 2020-09-29 |
Structural Monitoring and Seismic Resilience Evaluation of Buildings |
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| Wang Fei,Kang Xiandong,Liu Ying,Chen Hongyu.Structural Monitoring and Seismic Resilience Evaluation of Buildings[J].Technology for Earthquake Disaster Prevention,2022,17(3):569-578. |
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| Authors: | Wang Fei Kang Xiandong Liu Ying Chen Hongyu |
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| Institution: | Beijing Earthquake Agency, Beijing 100080, China |
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| Abstract: | Building response is the immediate parameter to reflect the structural dynamic characteristic. Real-time earthquake response monitoring is introduced to provide accurate input ground motions for seismic resilience evaluation. The method for building seismic resilience evaluation is put forward based on the loss of the non-structural elements. The fragility models are respectively determined for the displacement sensitive and acceleration sensitive non-structural elements. A six-story reinforced concrete frame structure is selected to construct the real-time monitoring system and evaluation of its seismic resilience is carried out based on the system recordings. According to the building design documents and the technical requirements, the monitoring scheme is accomplished and the system is instrumented. The building information model (BIM) is established according to the design documentation. The elastoplastic finite element model is simultaneously constructed based on the software OpenSees, an open source for finite element analysis. The data recorded in an earthquake are applied to update the numerical model. The updating terminates when the simulated frequencies is similarly consistent to the identified values from the recorded data. However, the amplitudes are unconspicuous and no plastic deformation appears. Ten bidirectional non-pulse ground motions are selected as the input data to simulate the real-time monitoring waves. The peak inter-story drift ratio and the acceleration are figured out to evaluate the loss of the structure function, then the score of seismic resilience is achieved. Analysis results show that the earthquake resistant performance is in good condition. However, the non-structural elements will be broken and fall down during major earthquakes. Effective measures are needed to improve the seismic resilience of the building. |
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| Keywords: | Real-time monitoring Model update Inter-story drift ratio Floor acceleration Seismic resilience |
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