机敏网传感器及其在桥梁裂缝监测中的应用
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摘要
机敏网裂缝监测传感技术模拟人类神经系统的感知机理,可对混凝土结构表面裂缝进行有效监测。针对斜拉桥索塔结构不同宽度裂缝的监测需要,基于机敏网传感器,提出了一种对初始裂缝发生发展及宽度监测的方法。大量实验证明改进后的机敏网传感器能够监测到混凝土结构表面不同开裂程度的裂缝及其扩展情况,根据不同型号漆包线的断裂对初始裂缝宽度进行判断。应用改进后的机敏网传感器,在桥梁索塔监测中及时发现了裂缝的发生发展情况和开裂程度,保障了桥梁安全。
Smart film crack monitoring technology,which simulates the perceptual mechanism of human nervous system,is able to detect cracks of concrete structures.Based on smart film sensor,a crack monitoring method is proposed for detecting the developing trend and width of initial cracks appearing on the towers of cable-stayed bridges.Experiments verify the ability of the improved smart film sensor for monitoring different width cracks in the surface of concrete structure and their developing trend. The width of initial cracks is judged according to the breakage of enameled copper wires with different diameters.The improved smart film sensors were applied to a real bridge,and the crack occurrence,developing trend and crack extent of some cracks in the concrete structure of the bridge were found in time.
Smart film crack monitoring technology,which simulates the perceptual mechanism of human nervous system,is able to detect cracks of concrete structures.Based on smart film sensor,a crack monitoring method is proposed for detecting the developing trend and width of initial cracks appearing on the towers of cable-stayed bridges.Experiments verify the ability of the improved smart film sensor for monitoring different width cracks in the surface of concrete structure and their developing trend. The width of initial cracks is judged according to the breakage of enameled copper wires with different diameters.The improved smart film sensors were applied to a real bridge,and the crack occurrence,developing trend and crack extent of some cracks in the concrete structure of the bridge were found in time.
引文
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[2]OU Jin-ping,LI Hui.Structural health monitoring in mainland China:review and future trends [J].Structural Health Monitoring,2010,9(3):219-231.
[3]FRASER M,ELGAMAL A,HE X F,et al.Sensor network for structural health monitoring of a highway bridge [J].Journal of Computing in Civil Engineering,2010,24(1):11-24.
[4]宗周红,孙建林,徐立群,等.大跨度连续刚构桥健康监测加速度传感器优化布置研究[J].地震工程与工程振动,2009,29(2):150-158.
[5]SOH C K,TSENG K K-H,BHALLA S,et al.Performance of smart piezoceramic patches in health monitoring of a RC bridge [J].Smart Materials and Structures,2000,9(4):533-542.
[6]ANSARI F.Structural health monitoring with fiber optic sensors [J].Frontiers of Mechanical Engineering in China,2009,4(2):103-110.
[7]唐天国,陈春华,刘浩吾.分布式光纤传感用于大坝基座裂缝监测[J].传感技术学报,2007,20(10):2357-2360.
[8]KOUDELKA P,PETRUJOVA B,LATAL J,et al.Optical fiber distributed sensing system applied in cement concrete commixture research [J].Radio Engineering,2010,19(1):172-177.
[9]BEATRIZ Martin-Perez,AMRE Deif,COUSIN Bruno.Strain monitoring in a reinforced concrete slab sustaining service loads by distributed Brillouin fibre optic sensors [J].Canadian Journal of Civil Engineering,2010,37(10):1341-1350.
[10]YANG C Q,WU Z S,ZHANG Y F.Structural health monitoring of an existing PC box girder bridge with distributed HCFRP sensors in a destructive test [J].Smart Materials & Structures,2008,17(3):1-10.
[11]周志祥,张奔牛.结构裂缝仿生监测系统及其监测方法:中国,ZL200810069808.X [P].2011-03-16.
[12]庞碧波,刘永智,欧中华,等.光纤大电流传感器研究[J].现代电子技术,2009,32(22):186-188.
[13]雷文礼,任新成,樊延虎,等.基于ZigBee的大坝监测系统接收终端研究[J].现代电子技术,2012,35(21):4-6.
[14]张启福,吴学杰,柴秀英,等.基于CAN总线的桥梁健康检测系统的研究[J].现代电子技术,2012,35(21):98-100.
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