引入信息熵理论的砼结构损伤动力识别新思路  

New thought on dynamic identification technology for damage detection of RC structures by introducing information entropy theory

作　　者：刘国华[1] 吴志根[1] 

机构地区：[1]浙江大学水工结构与水环境研究所,杭州310058

出　　处：《振动与冲击》2011年第6期162-171,共10页Journal of Vibration and Shock

基　　金：国家自然基金项目(50579081);浙江省研究生创新项目(YK2008025)

摘　　要：对基于振动特性的混凝土结构损伤识别方法进行综述,提炼出损伤识别指标的敏感性不足、非线性分析困难、适用范围有限、实验验证方法单一和数值模拟不合理等不足。进而在理论和技术的可行性分析基础上,将耗散结构和信息熵理论系统引入到混凝土结构损伤识别领域中,通过构造信息熵指标来反映系统损伤的无序程度,在传感器的布点优化、损伤位置的确定、损伤程度的量化和处理结构损伤上显示出较大的潜力,有望利用信息熵理论来部分解决目前存在的混凝土结构损伤领域的难点,为混凝土结构健康监测系统的建设和运行提供科学依据和技术支撑。A general summary and review of state-of-the-art of vibration-based methods for RC structural damage detection were presented.Various disadvantages of the existing methods were Abstracted,such as low sensitivity,inability for non-linear analysis,limitation of application scope,incomplete validation methods and unreasonable numerical-simulation.Then,the thoughts of dissipative structure and information entropy were introduced into the study of concrete damage detection.The feasibility of the theory and technology was analysed and through establishing the information entropy index,the disorder extent of system＇s damage was presented.Furthermore,there appears a great potential of applying the method in following areas： optimal arrangement of sensor locations,identification of damage location and extent,as well as treatment of damages.Therefore,information entropy theory is expected to be a promising method for partly improving damage identification technology,and providing scientific evidence and technical support in construction and operation of structural health monitoring system.

关 键 词：混凝土结构 损伤识别 传感器布置 振动特性 耗散结构 信息熵 

分 类 号：TU528.01[建筑科学—建筑技术科学] TU317