基于低成本振动监测的砌体塔异常检测与定位

IF 2.1 3区 工程技术 Q2 ENGINEERING, CIVIL
C. Gentile, P. Borlenghi, A. Saisi
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引用次数: 3

摘要

砌体塔的结构健康状况可以通过在建筑物顶部安装几个加速度计(或地震仪)来监测。这种具有成本效益的装置提供了有关结构固有频率的连续可靠信息,并允许检测结构异常的发生;然而,要用这种简化的传感器分布从异常检测到定位,需要一个校准的数值模型。本文综述了基于频率数据的砌体塔损伤评估模型的结构健康监测(SHM)方法的发展。拟议的方法包括以下步骤:(i)初步分析,包括几何调查和环境振动测试;(ii)基于已识别模态参数的有限元建模和更新;(iii)根据数值模拟的损伤情景创建损伤位置参考矩阵(DLRM);(iv)通过对连续收集的振动数据的分析来检测损伤的发生,(v)通过实验识别的固有频率变化与上述定义的DLRM矩阵的比较来定位异常。提出的SHM方法在意大利曼图亚的古Zuccaro塔上得到了体现。生成伪实验监测数据,并利用伪实验监测数据对该算法进行损伤定位的可靠性评估。研究结果表明,该方法在古塔损伤早期识别中的实际应用前景广阔。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Detecting and localizing anomalies on masonry towers from low-cost vibration monitoring
The structural health of masonry towers can be monitored by installing few accelerometers (or seismometers) at the top of the building. This cost-effective setup provides continuous and reliable information on the natural frequencies of the structure and allows to detect the occurrence of structural anomalies; however, to move from anomaly detection to localization with such a simplified distribution of sensors, a calibrated numerical model is needed. The paper summarizes the development of a Structural Health Monitoring (SHM) procedure for the model-based damage assessment in masonry towers using frequency data. The proposed methodology involves the subsequent steps: (i) preliminary analysis including geometric survey and ambient vibration tests; (ii) FE modeling and updating based on the identified modal parameters; (iii) creation of a Damage Location Reference Matrix (DLRM) from numerically simulated damage scenarios; (iv) detection of the onset of damage from the analysis of the continuously collected vibration data, and (v) localization of the anomalies through the comparison between the experimentally identified variations of natural frequencies and the above-defined DLRM matrix. The proposed SHM methodology is exemplified on the ancient Zuccaro tower in Mantua, Italy. Pseudo-experimental monitoring data were generated and employed to assess the reliability of the developed algorithm in identifying the damage location. The results show a promise toward the practical applications of the proposed strategy for the early identification of damage in ancient towers.
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来源期刊
Smart Structures and Systems
Smart Structures and Systems 工程技术-工程:机械
CiteScore
6.50
自引率
8.60%
发文量
0
审稿时长
9 months
期刊介绍: An International Journal of Mechatronics, Sensors, Monitoring, Control, Diagnosis, and Management airns at providing a major publication channel for researchers in the general area of smart structures and systems. Typical subjects considered by the journal include: Sensors/Actuators(Materials/devices/ informatics/networking) Structural Health Monitoring and Control Diagnosis/Prognosis Life Cycle Engineering(planning/design/ maintenance/renewal) and related areas.
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