基于压电阻抗技术的混凝土剪力墙裂缝损伤监测
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摘要
简要阐述了基于压电阻抗法的结构损伤监测技术基本原理,指出了该项技术的优点。结合压电阻抗法及混凝土结构的特点,提出了针对混凝土裂缝损伤监测的传感器布置策略。最后,利用有限元软件对基于压电阻抗技术的混凝土裂缝损伤监测技术进行数值模拟研究。在研究中,建立了黏贴有压电陶瓷传感器列阵的混凝土剪力墙模型,模拟了墙体由健康状态逐渐向失效状态发展的4个阶段。研究结果显示,传感器列阵能够很好地对混凝土剪力墙损伤及其发展情况进行监测。对损伤的定量分析和定位分析结果也与实际情况相吻合。
The basic principle of structure health monitoring technology based on impedance method was stated simply and its characters were still pointed out.A strategy of transducers placement for the monitoring of concrete crack was proposed according to the characters of impedance method and concrete structure.At last,a numerical simulation research about the concrete shear wall crack monitoring based on impedance method was hold by finite element analysis software.In research,a model of concrete shear wall with piezoceramics transducers array was constructed and the four stages form health stage to failure stage was simulated.The results had shown that transducers array could monitor the development of crack damage well.The result of quantitative and location analysis for the damage was agree with the practical situation.
The basic principle of structure health monitoring technology based on impedance method was stated simply and its characters were still pointed out.A strategy of transducers placement for the monitoring of concrete crack was proposed according to the characters of impedance method and concrete structure.At last,a numerical simulation research about the concrete shear wall crack monitoring based on impedance method was hold by finite element analysis software.In research,a model of concrete shear wall with piezoceramics transducers array was constructed and the four stages form health stage to failure stage was simulated.The results had shown that transducers array could monitor the development of crack damage well.The result of quantitative and location analysis for the damage was agree with the practical situation.
引文
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[2]周智,欧进萍.用于土木工程的智能监测传感材料性能及比较研究[J].建筑技术,2002,33(4):270-272.
[3]陶宝祺.智能材料结构[M].北京:国防工业出版社,1997.
[4]曹照平,王社良.智能材料结构在土木工程中的应用[J].重庆建筑大学学报,2001,23(1):108-113.
[5]李宏男,赵晓燕.压电智能传感结构在土木工程中的研究和应用[J].地震工程与工程振动,2004,24(6):165-172.
[6]孙明清,李卓球,侯作富.压电材料在土木工程结构健康监测中的应用[J].混凝土,2003(3):22-24.
[7]焦莉,李宏男.PZT的EMI技术在土木工程健康监测中的研究进展[J].防灾减灾工程学报,2006,26(1):102-108.
[8]SUN F P,CHAUDHRY Z,LIANG Ce,t al.Truss structure integrity identi-fication using PZT sensor-actuator[J].Journal of Intelligent material sys-tems and structures,1995,16(2):134-139.
[9]SOH C K,TSENG K K,BHALLA S,et al.Performance of smart piezo-ceramic patches in health monitoring of a RC bridge[J].Smart Materialsand Structures,2000,9(4):533-542.
[10]孙威,阎石,张莺.基于压电陶瓷传感器的混凝土结构健康监测技术的数值模拟研究[J].混凝土,2008(2):34-38.
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