| PZT-混凝土结构裂缝监测敏感因子提取试验 |
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| 引用本文： | 刘智,阎石,孙威.PZT-混凝土结构裂缝监测敏感因子提取试验[J].水利与建筑工程学报,2010,8(1):15-18. |
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| 作者姓名： | 刘智 阎石 孙威 |
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| 作者单位： | 沈阳建筑大学,土木工程学院,辽宁,沈阳,110168 |
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| 基金项目： | 住房与城乡建设部科学技术项目(2008-k4-39);;辽宁省高校重点实验室支持计划(2008S189) |
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| 摘 要： | 结构损伤识别是混凝土结构健康监测的核心技术之一,其结构损伤识别特征参数的选取非常重要。文中以代表性较强的压电陶瓷材料(锆钛酸铅即PZT)为例,分5组工况,即1组健康工况,4组损伤工况对混凝土梁进行了裂缝损伤识别试验,并分析了各损伤工况下信号参数随损伤程度的变化情况。提取到信号的幅值、主频以及相位3个参数可作为判定结构损伤的情况,其中信号的幅值对混凝土结构裂缝损伤较为敏感且能预测损伤的发展趋势。结果表明,监测信号的幅值,可作为判断结构健康状态及损伤程度的敏感因子,结构损伤愈大,信号的衰减程度愈大。
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| 关 键 词： | 压电陶瓷 PZT传感器 混凝土结构 结构损伤 敏感因子 |
Experimental Research on Damage-sensitive Factor Extraction in Crack Detection for PZT Concrete Structure |
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| LIU Zhi,YAN Shi,SUN Wei.Experimental Research on Damage-sensitive Factor Extraction in Crack Detection for PZT Concrete Structure[J].Journal of Water Resources Architectural Engineering,2010,8(1):15-18. |
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| Authors: | LIU Zhi YAN Shi SUN Wei |
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| Affiliation: | College of Civil Engineering;Shenyang Architectural University;Shenyang;Liaoning 110168;China |
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| Abstract: | The structural damage detection is one of the main techniques in concrete inspection,and the selection for characteristic parameters is very important in the detection.An experimental method of crack detection for concrete structures embedded with PZT sensors is presented here.The detecting signals are respectively analyzed in the time and frequency domain,and the parameters such as the amplitude,frequency and phase of the signals are extracted as factors to evaluate the structural damage.The damage-sensiti... |
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| Keywords: | piezoelectric ceramics piezoelectric sensor concrete structure structural damage damage-sensitive factor |
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