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Monitoring historical masonry structures with operational modal analysis: Two case studies

机译:使用运营模式分析监测历史砌体结构:两个案例研究

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The paper addresses two complex case studies of modal and structural identification of monuments in Portugal: the Clock Tower of Mogadouro and the Church of Jeronimos Monastery, in Lisbon. These are being monitored by University of Minho with vibration, temperature and relative air humidity sensors. Operational modal analysis is being used to estimate the modal parameters, followed by statistical analysis to evaluate the environmental effects on the dynamic response. The aim is to explore damage assessment in masonry structures at an early stage by vibration signatures, as a part of a health monitoring process that helps in the preservation of historical constructions. The paper presents the necessary preliminary dynamic analysis steps before the monitoring task, which includes installation of the monitoring system, system identification and subsequent FE model updating analysis, automatic modal identification and investigation of the influence of the environment on the identified modal parameters.
机译:本文介绍了葡萄牙纪念碑的模态和结构识别的两个复杂案例研究:莫加多罗钟楼和里斯本热罗尼姆斯修道院教堂。这些由Minho大学通过振动,温度和相对空气湿度传感器进行监控。运行模态分析用于估计模态参数,然后进行统计分析以评估环境对动态响应的影响。目的是在早期阶段通过振动信号探索砌体结构的损坏评估,这是有助于保护历史建筑的健康监测过程的一部分。本文提出了监测任务之前必要的初步动态分析步骤,包括监测系统的安装,系统识别和后续有限元模型更新分析,自动模态识别以及环境对所识别模态参数的影响的调查。

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