Study of Building Safety Monitoring by Using Cost-Effective MEMS Accelerometers for Rapid After-Earthquake Assessment with Missing Data.
Study of Building Safety Monitoring by Using Cost-Effective MEMS Accelerometers for Rapid After-Earthquake Assessment with Missing Data.
复制标题
通过使用具有成本效益的MEMS加速度计对建筑物安全监测的研究，以快速的递减后评估数据，而数据丢失了。
DOI：
10.3390/s21217327
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发表时间：
2021-11-03
期刊：
影响因子：
--
通讯作者：
Liu JX
中科院分区：
文献类型：
--
作者：
Lin JF;Li XY;Wang J;Wang LX;Hu XX;Liu JX
由于结构劣化和自然灾害，土木结构在极端荷载作用下的恢复力必然下降，可能导致结构的灾难性破坏，对公共安全构成极大威胁。地震诱发的极端荷载是导致建筑物结构破坏的主要原因之一。然而，中国地震易发地区的许多建筑物缺乏安全监测，普遍的结构健康监测系统通常非常昂贵和复杂，无法广泛应用。为了促进具有成本效益的建筑物安全监测，本研究探讨了一种使用具有成本效益的MEMS加速度计进行建筑物震后快速评估的方法。首先，对具有成本效益的MEMS传感器进行了参数分析，以确定其在建筑安全监测中的适用性。其次，不同于现有的研究倾向于在实验室中使用简化的建筑模型或受强运动激励的小型框架结构，本研究在分析了中国地震风险后，选择了位于典型地震易发地区的在役公共建筑。该建筑采用了成本效益高的MEMS加速度计，其特点是噪声水平低，能够捕捉低频小幅度动态响应。在此基础上，系统地提出了一种快速缺失数据重建、基于加速度响应积分的位移响应估计和基于最大位移和最大层间位移比的安全评估方案。最后，将所提出的方法成功地应用于一个基于缺失数据的建筑物地震反应的建筑物安全评估中。本文的研究有助于基于mems的高性价比建筑监测和快速震后评估的广泛工程应用。
Suffering from structural deterioration and natural disasters, the resilience of civil structures in the face of extreme loadings inevitably drops, which may lead to catastrophic structural failure and presents great threats to public safety. Earthquake-induced extreme loading is one of the major reasons behind the structural failure of buildings. However, many buildings in earthquake-prone areas of China lack safety monitoring, and prevalent structural health monitoring systems are generally very expensive and complicated for extensive applications. To facilitate cost-effective building-safety monitoring, this study investigates a method using cost-effective MEMS accelerometers for buildings’ rapid after-earthquake assessment. First, a parameter analysis of a cost-effective MEMS sensor is conducted to confirm its suitability for building-safety monitoring. Second, different from the existing investigations that tend to use a simplified building model or small-scaled frame structure excited by strong motions in laboratories, this study selects an in-service public building located in a typical earthquake-prone area after an analysis of earthquake risk in China. The building is instrumented with the selected cost-effective MEMS accelerometers, characterized by a low noise level and the capability to capture low-frequency small-amplitude dynamic responses. Furthermore, a rapid after-earthquake assessment scheme is proposed, which systematically includes fast missing data reconstruction, displacement response estimation based on an acceleration response integral, and safety assessment based on the maximum displacement and maximum inter-story drift ratio. Finally, the proposed method is successfully applied to a building-safety assessment by using earthquake-induced building responses suffering from missing data. This study is conducive to the extensive engineering application of MEMS-based cost-effective building monitoring and rapid after-earthquake assessment.
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