混凝土桥梁裂缝仿生监测及工程应用研究  

Study on Bionic Crack Monitoring in Concrete Bridge and Its Application

作　　者：徐勇[1,2] 周志祥[2] 张奔牛[2] 

机构地区：[1]西南交通大学,四川成都610031 [2]重庆交通大学,重庆400074

出　　处：《公路交通科技》2011年第4期73-78,共6页Journal of Highway and Transportation Research and Development

基　　金：国家自然科学基金资助项目(50808188);交通部西部交通建设科技项目(2009318814065);重庆市科委攻关项目(CSTC2009AC6080)

摘　　要：针对现常用的健康监测系统中不能解决诊断混凝土桥梁结构初始裂纹的产生和发展状况,在混凝土桥梁裂纹仿生监测原理基础上,模拟生物体的神经元及神经脉络分布对生物体内部或外部各个局部变化(如开裂)的感知机制,实现对混凝土桥梁结构关键区域的裂缝监测。分别从试验和断裂力学理论两方面证明了裂缝仿生监测机敏膜能够监测混凝土桥梁的裂缝。试验结果表明,裂缝仿生监测系统最小能监测到0.02 mm宽度裂缝,并可有效的分析和重构裂缝位置、形状和扩展状况;在力学特性方面,机敏膜具有良好的通、断性能来显示裂缝。相关研究成果已用于混凝土桥梁的裂缝的监测。In the concrete bridge structural health monitoring,one of the most important problems is the crack identification.For commonly used health monitoring systems cannot solve the diagnosis of the emerge and development of initial cracks in concrete bridge structure,the basic idea of smart film for bionic crack monitoring was introduced to simulate the distribution of neurons and neural context of organism for perceiving all local changes（e.g.,cracking） of internal or external organism for the realization of monitoring cracks of concrete bridge structure in critical areas based on the principle of bionic crack monitoring in concrete bridge.It is proved that smart film can monitor the concrete cracks using the experiment and the theories of fracture mechanics.The experiment results show that（1） the bionic crack monitoring system could monitor cracks when the width is more than 0.02 mm,and analyze and reconstruct the location,shape and extension conditions of the cracks;（2） since smart film has good on-off character for crack indication in mechanical aspect.The related research results have been used for the monitoring of cracks in concrete bridges.

关 键 词：桥梁工程 裂缝监测 断裂力学 混凝土桥梁 机敏膜 

分 类 号：U448.33[建筑科学—桥梁与隧道工程]