利用自传感FRP筋实现结构性能全面监测和自诊断研究
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吴智深1，唐永圣1，黄璜2（1 东南大学城市工程科学研究院， 南京 210096； 2 日本茨城大学， 日立 316-8511）［摘要］基于对现有结构健康监测（SHM）的分析，提出了利用应变传感方式开发自传感FRP筋实现结构全面监测和评估的SHM体系。为此，首先针对结构应变传感的需求开发一系列封装技术，将分布式传感光纤埋设进纤维复合材料（FRP），制备自传感FRP筋，大幅提升了光纤的传感性能、施工性和传感耐久性，扩大了其应用范围。随后，针对土木建筑结构具有体量大、杆件多、损伤局部发生等特点，提出了在这些损伤发生概率大的区域分布式布设传感器，进行全面监测，也即区域传感的理念。同时，通过纤维模型理论和动力参数分析理论建立结构健康诊断体系。最后，通过梁、柱的模型验证了所提出的结构监测和健康自诊断体系。研究结果表明，基于应变监测可以建立有效的SHM体系。［关键词］结构健康监测； 分布式光纤传感； 自传感FRP筋中图分类号：TU317 文献标识码：A 文章编号：1002-848X(2013)19-0005-05Structural monitoring and health self-diagnosing based on self-sensing FRP barsWu Zhishen1, Tang Yongsheng1, Huang Huang2(1 International Institute for Urban Systems Engineering, Southeast University, Nanjing 210096, China; 2 Department of Urban & Civil Engineering, Ibaraki University, Hitachi 316-8511, Japan)Abstract: A self-sensing FRP bar based SHM system for achieving comprehensive structural monitoring and self-evaluating was presented. At first, the distributed optical fiber sensors were embedded into fiber reinforced polymer (FRP) to manufacture the self-sensing FRP bar with some special packages, making the optical fiber more effective and robust, which expanded the scope of its application the harsh environment of civil engineering. Then, considering the features of civil engineering structures, such as large-scale, a lot of members and damage developing locally, the concept of area sensing was proposed to optimize the sensor installation, namely distributed installation of sensors covering the zones where damages will happen with large possibility. Subsequently, the structural health self-diagnosing system was proposed based on the theories of fiber model and dynamic analysis methods. At last, the proposed structural monitoring and health self-diagnosing was verified with the experiments of beam and column models in the lab. The results have confirmed that the efficient SHM system can be constructed with only strain monitoring.Keywords: structural health monitoring; distributed optical fiber sensing; self-sensing FRP bar作者简介：吴智深，博士，教授，Email：zswu@mx.ibaraki.ac.jp。参考文献［1］WU ZHISHEN. Structural health monitoring and intelligent infrastructures in Japan［C］. Japan: A.A.BALKEMA Publishers, 2003.［2］LI SUZHEN, WU ZHISHEN. Development of distributed long-gage fiber optic sensing system for structural health monitoring［J］. Structural Health Monitoring, 2007, 6(7):133-143.［3］LI SUZHEN, WU ZHISHEN. Sensitivity enhancement of long-gage FBG sensors for macrostrain measurements［J］.Structural Health Monitoring,2009,8(11):415-423.［4］ZHANG HAO, WU ZHISHEN. Performance evaluation of BOTDR-based distributed fiber optic sensors for crack monitoring［J］. Structural Health Monitoring, 2008, 7(2): 143-156.［5］TANG YONGSHENG,WU ZHISHEN,YANG CAIQIAN,et al.A new type of smart BFRP bars as both reinforcements and sensors for civil engineering application［J］. Smart Materials and Structures, 2010, 19:1-14.［6］TANG YONGSHENG, WU ZHISHEN, YANG CAIQIAN, et al. Development of selfsensing BFRP bars with distributed optic fiber sensors［C］//USA: SPIE, 2009, 7293：1701-1710.［7］WU ZHISHEN, LI SUZHEN. Structural damage detection based on smart and distributed sensing technologies［C］//Shenzhen: ICSHMII, 2005: 107-120.［8］LI SUZHEN, WU ZHISHEN. A non-baseline algorithm for damage locating in flexural structures using dynamic distributed macro-strain responses［J］. Earthquake Engineering & Structural Dynamics, 2007, 36(9): 1109-1125.［9］LI SUZHEN, WU ZHISHEN. Modal analysis on macro-strain measurements from distributed long-gage fiber optic sensors［J］. Journal of Intelligent Material Systems and Structures, 2008, 19(8): 937-946.［10］ADEWUYI AP, WU ZHISHEN, SERKER NHMK. Assessment of vibration-based damage identification methods using displacement and distributed strain measurements［J］. Structural Health Monitoring, 2009, 8(6): 443-461.［11］WU ZHISHEN, LI SUSHEN. Two-level damage detection strategy based on modal parameters from distributed dynamic macro-strain measurements［J］. Journal of Intelligent Material Systems and Structures, 2007, 18(7): 667-676.［12］LI SUZHEN, WU ZHISHEN. A model-free method for damage locating and quantifying in a beam-like structure based on dynamic distributed strain measurements［J］. Computer-Aided Civil and Infrastructure Engineering, 2008, 23: 404-413.
