利用压电智能骨料的钢管混凝土柱密实性检测试验
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摘要
目的利用压电智能骨料对钢管混凝土柱的混凝土浇筑密实性进行检测,实现混凝土密实性的定量评判.方法将智能骨料作为基本的检测元件埋置在构件内部,每相邻两块智能骨料之间构成一个检测对.采用一发一收互动法,在试件中发射并接收信号,以欧式距离作为密实性的评价指标,比较同一检测对中的两个智能骨料所接收到的对方发射信号的差异程度,判断这位于两个骨料间的混凝土是否存在不密实.结合实际工程,对试验结果进行了验证.结果根据欧式距离D3和D6数值偏大,推断出隔板位置密实性较差,这一结果得到了传统超声检测方法的验证.结论笔者提出的方法具有良好的有效性和可靠性,能有效地检测出钢管混凝土的不密实性,应用于实际工程切实可行.
A new method was proposed in the paper to detect the density of concrete filled steel tube columns.The smart aggregate was the basic unit to be buried into concrete.The two adjacent units were used as a detecting pair.Launch-receive interactive method was employed to launch and receive signals.Euclidean distance was applied as the measurement of density to decide the signals difference in a detecting pair to evaluate whether the specimen was defective.At last,a proving test in situ was conducted.The experimental data can be concluded that the density in the location of specimen clapboard is worse.The result is agreed with traditional ultrasonic detection method.The results showed that the proposed method was effective to detect the density of concrete filled steel tube,and it is possible to be used in civil engineering.
A new method was proposed in the paper to detect the density of concrete filled steel tube columns.The smart aggregate was the basic unit to be buried into concrete.The two adjacent units were used as a detecting pair.Launch-receive interactive method was employed to launch and receive signals.Euclidean distance was applied as the measurement of density to decide the signals difference in a detecting pair to evaluate whether the specimen was defective.At last,a proving test in situ was conducted.The experimental data can be concluded that the density in the location of specimen clapboard is worse.The result is agreed with traditional ultrasonic detection method.The results showed that the proposed method was effective to detect the density of concrete filled steel tube,and it is possible to be used in civil engineering.
引文
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[10]阎石,孙威.一种用于土木工程结构健康监测的压电智能骨料[P].中国专利:ZL200810010010.8,2008-01-02.(Yan Shi,Sun Wei.Piezoelectric intelligent aggre-gate for civil engineering w orks structure health mo-nitoring[P].China Invention&Patent:ZL2008 10010010.8,2008-01-02.)
[11]Giurgiutiu V,Zagrai A N.Embedded self-sensing pi-ezoelectric active sensors for online structural identi-fication[J].Journal of VbritionandAeoustie,2002,124(1):116-125.
[12]Tseng K K,Wang L S.Smart piezoelectric transduc-ers for in situ health monitoring of concrete[J].Smart Materials and Structures,2004,13(5):1017-1024.
[13]Bhalla S,Soh C K.Structural health monitoring bypie-impedance transducers I:modeling[J].Journal ofAerospace Engineering,2004,17(4):154-165.
[14]Shi Yan,Wei Sun.Numerical simulation for concretestructure health monitoring based on smart piezoelec-tric transducer array[J].Advance in Science andTechnology,2008,56:469-476.
[15]Song G,Gu H,Mo Y L,et al.Concrete structuralhealth monitoring using embedded piezoceramictransducers[J].Smart Materials and Structures,2007,16(4):959-968.
[16]Gu H,Song G,Dhonde H,et al.Concrete early-agestrength monitoring using embedded piezoelectrictransducers[J].Smart Materials and Structures,2006,15(2):1837-1845.
[2]千力.基于声发射技术的混凝土损伤评估[D].武汉:华中科技大学,2005.(Qian Li.Damage evaluation of concrete based on a-coustic emission technique[D].Wuhan:HuazhongUniversity of Science and Technology,2005.)
[3]王金枝.基于超声方法的混凝土早期损伤识别的试验研究[D].武汉:武汉理工大学,2007.(Wang Jinzhi.Experimental research on the identifi-cation of initial damage of concrete based on ultra-sonic w ave[D].Wuhan:Wuhan University of Tech-nology,2007.)
[4]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.(Li Hongnan,Zhao Xiaoyan.Research and applica-tion of piezo-intelligent sensors in civil engineering[J].Earthquake Engineering and Engineering Vibra-tion,2004,24(6):165-172.)
[5]陶宝祺.智能材料结构[M].北京:国防工业出版社,1997.(Tao Baoqi.Smart materials and structures[M].Beijing:National Defence Industry Press,1997.)
[6]Li H N,Nin X L.Optimization of non-uniformly dis-tributed multiple tuned mass damper[J].Journal ofSound and Vibration,2007,308(1):80-97.
[7]Hyun Woo Parka,Hoon Sohnb,Kincho H L,et al.Time reversal active sensing for health monitoring ofa composite plate[J].Journal of Sound and Vibra-tion,2007,302:50-66.
[8]Seung Dae Kim,Chi Won In,Kelly E C,et al.Refer-ence-free NDT technique for debonding detection inCFRP-Strengthened RC Structures[J].Journal ofStructural Engineering,2007,8(133):1080-1091.
[9]孙威,阎石,蒙彦宇,等.压电陶瓷混凝土结构应力波衰减特性试验[J].沈阳建筑大学学报:自然科学版,2010,26(5):833-837.(Sun Wei,Yan Shi,Meng Yanyu,et al.Experimentalresearch on stress w ave attenuation behavior of con-crete structure w ith piezoelectric ceramic sensors[J].Journal of Shenyang Jianzhu University:NaturalScience,2010,26(5):833-837.)
[10]阎石,孙威.一种用于土木工程结构健康监测的压电智能骨料[P].中国专利:ZL200810010010.8,2008-01-02.(Yan Shi,Sun Wei.Piezoelectric intelligent aggre-gate for civil engineering w orks structure health mo-nitoring[P].China Invention&Patent:ZL2008 10010010.8,2008-01-02.)
[11]Giurgiutiu V,Zagrai A N.Embedded self-sensing pi-ezoelectric active sensors for online structural identi-fication[J].Journal of VbritionandAeoustie,2002,124(1):116-125.
[12]Tseng K K,Wang L S.Smart piezoelectric transduc-ers for in situ health monitoring of concrete[J].Smart Materials and Structures,2004,13(5):1017-1024.
[13]Bhalla S,Soh C K.Structural health monitoring bypie-impedance transducers I:modeling[J].Journal ofAerospace Engineering,2004,17(4):154-165.
[14]Shi Yan,Wei Sun.Numerical simulation for concretestructure health monitoring based on smart piezoelec-tric transducer array[J].Advance in Science andTechnology,2008,56:469-476.
[15]Song G,Gu H,Mo Y L,et al.Concrete structuralhealth monitoring using embedded piezoceramictransducers[J].Smart Materials and Structures,2007,16(4):959-968.
[16]Gu H,Song G,Dhonde H,et al.Concrete early-agestrength monitoring using embedded piezoelectrictransducers[J].Smart Materials and Structures,2006,15(2):1837-1845.
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