华南理工大学土木与交通学院,广州 510006
侯爽(1977—),男,教授,博导,博士。主要从事钢筋混凝土结构地震损伤及材料性能监测研究。E-mail: cthous@scut.edu.cn
收稿:2023-03-30,
修回:2023-05-12,
纸质出版:2024-10-15
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侯爽,谭文玮.剪应力压电智能骨料灵敏度便捷标定方法[J].防灾减灾工程学报,2024,44(05):1126-1132.
HOU Shuang,TAN Wenwei.A Convenient Sensitivity Calibration Method for Piezoelectric Smart Aggregates for Shear Stress[J].Journal of Disaster Prevention and Mitigation Engineering,2024,44(05):1126-1132.
侯爽,谭文玮.剪应力压电智能骨料灵敏度便捷标定方法[J].防灾减灾工程学报,2024,44(05):1126-1132. DOI: 10.13409/j.cnki.jdpme.20230330001.
HOU Shuang,TAN Wenwei.A Convenient Sensitivity Calibration Method for Piezoelectric Smart Aggregates for Shear Stress[J].Journal of Disaster Prevention and Mitigation Engineering,2024,44(05):1126-1132. DOI: 10.13409/j.cnki.jdpme.20230330001.
大量混凝土结构在地震中出现显著剪切破坏特征,有必要开展混凝土剪应力监测。以PZT压电陶瓷为敏感传感元件的剪应力压电智能骨料传感器已被学者们证实能够实现混凝土内部剪应力的监测。然而,目前剪应力压电智能骨料的灵敏度标定试验依赖于高精密加载设备或大型结构构件,存在试验复杂、成本高以及标定后传感器无法重复使用等问题。本研究首先提出了一种基于单摆装置循环加载的剪应力压电智能骨料灵敏度便捷标定方法;其次,通过有限元和试验方法研究了加载位置变化对及单摆面外运动对灵敏度标定的影响;最后,通过该方法标定了一批剪应力压电智能骨料的灵敏度,并与精密加载获得的灵敏度进行了对比。本研究对提高混凝土结构剪应力监测精度具有重要意义。
Significant shear damage has been observed in numerous concrete structures during earthquakes
highlighting the necessity of monitoring shear stress in concrete.Piezoelectric smart aggregate sensors for monitoring shear stress
utilizing PZT piezoelectric ceramics as sensitive sensing elements
have been proven by researchers to effectively monitor the internal shear stress of concrete. However
current sensitivity calibration tests for piezoelectric smart aggregates for shear stress rely on high-precision loading equipment or large structural components
resulting in complex testing procedures
high costs
and non-reusability of sensors after calibration. First
this study proposed a convenient calibration method for sensitivity of piezoelectric smart aggregates for shear stress based on cyclic loading using a pendulum device. Furthermore
the influence of loading position variation and out-of-plane movement of the pendulum on sensitivity calibration was investigated through finite element analysis and experimental methods. Finally
the sensitivity of a batch of piezoelectric smart aggregates for shear stress was calibrated using this method and compared with the sensitivity obtained through high-precision loading. This research is of great significance for improving the accuracy of shear stress monitoring in concrete structures.
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