Intelligent Structure And The Detection And Inspection Of It

In recent years ,as the technologies of new materials ,IT and computer rapidly develop and combine with the traditional productive mode ,the Hi -tech has been rapidly penetrating almost all of industries including civil engineering .The civil engineering structures which has the intelligent functions like the human being are becoming realities .It will be advantageous to remove dangerous things and prevent potential catastrophic events through respecting condition, detecting damage, diagnosing health, and evaluating safety of the building structures in service. The thought of intelligent structure and health diagnosis of it was brought forward frequently by the research in the field of civil engineering, and the research of this field has become hit of invest and research.In this paper, the author has done some research works on the theory frame of the intelligent structure, the detection and health condition inspection of it.Firstly, aiming at the state of intelligent structure the art on the theoretic and applied research work ,clearly define the conception of the intelligent structure ;discuss the components of the intelligent structure; introduce the characteristic of artificial neural net (ANN) which is used on the civil engineering structure ;discuss the method that is suit to the intelligent structure-mode identification based on ANN ; discuss the research content of the intelligent structure; and both the characteristic of the intelligent structure design and its flow chart are discussed.Secondly ,the structural health (damage) detection method based dynamics is discussed ;from the point of view of inverse problems in mechanics ,two trains of thought for solving the intelligent structure commutative problems are proposed ,i.e. :by means of intelligence computation method with geometrical modeling and by the aid of finite element method with geometrical modeling . By comparing the two methods, a feasible and optimum seeking method is presented to the intelligent structure commutative problems, which combinethe finite element method and ANN method.Finally, a detailed and intelligent solution is proposed for diagnosing the health condition of the structure, which based on BP neural net-the method identified step by step, combine with a numerical example .The frame structure is a two bays and three stories .Through establishing ANN model, simulating verification has been processed, which is to predict the damage location and severity .It has been shown that a proper ANN model has a comparatively strong ability on damage identification .However, numerical results also show that further research should be done to improve the precision of the damage identification.