| As just stepping into the 21th century,Hi-tech has been rapidly penetrating almost all of the traditional industries. Especially,the technologies of the new materials,IT and the computer,are further combined with the traditional productive mode,so as to make the tatter's productive level an unprecedented improvement.The strength,serviceability,safety and durability of the structure have been concerned by human being for a long time. Particularly after the event '9.11' taken place in USA,the safety of the structure has become the problem,to which the modern and future societies pay even more dose attention. The thought of intelligent structure was brought forward by the researcher in the field of civil engineering,because it can expendbasically the function of the building structure and meet extremely human need for thesafty-trut of the living space. Therefore,undoubtedly intelligent structure has become anew development direction for the future civil engineering structures.The research on intelligent civil/bridge structure (ICS/IBS) theory and test is still inthe initial stage;a lot of theoretical problem such as conception and definition need to beclarified. Heretofore,there is still no comprehensive theory frame to be published. Thiscondition will hinder the research from making progress greatly. It is well known that,agood theory will be beneficial to rise of a cross-subject,so the author has done someresearch works on the theory of ICS/IBS and its kernel arithmetic. Shortly,the research works in this paper are as follow.1. Using the style for defining smart material structure brought forth in the field of aerospace industry for reference,the author gives the definition to ICS/IBS explicitly,that is:"because of partially embedded intelligent substructure or intelligent material,the civil/bridge structures are endued with animal-imitated function such as self-monitoring,self-diagnosis,self-adaptation and self-restoration,and as a result,the demand of structure safety and service convenience are met in maximum degree. These structures are called after the intelligent civil/bridge structure,in short,ICS/IBS" . Meanwhile,a classification for ICS/IBS is made,and the main development direction for research-Embeded ICS/IBS is pointed out as well.2. The theory system composition of ICS/IBS is comprehensively discussed,and from the point of view of bionics,the components of ICS/IBS are also anatomised. Aimming at the state of the art on the theoretical and applied research work,the three-level conception of structure intellectualization (or intelligentizing) is put forward,and both the characteristic of ICS/IBS design and its flow chart are discussed in thispaper. In the meantime,an overall design scheme of ICS/IBS is given,which is composed of three subsystems,namely:health self-sensed monitoring subsystem,health self-diagnosis subsyetem and disaster response control subsystem.3. A feasible hardware system solution scheme for measuring and controlling ICS/IBS is discussed. Firstly,the integration technics between basic structure material and intelligent material is lucubrated,which is the key of the whole course for carrying ICS/IBS in practice. Meanwhile,the mathematic modeling on optimal placement of sensor for static test is founded,and the strain gauge network optimal design method for girder bridge static test is also given,which has been verified by an instance. Moreover,a hardware environment based on traditional data acquisition technic is builded,and the communication driver between the strain gauge and computer DIO card is also realized in two ways,one is coded in Win 32 API,and the orther is in MATLAB language.4. From the point of view of inverse problems in mechanics,two trains of thought for solving ICS/IBS computative problems,i.e:by means of intelligence computation method without geometrical modeling and by the aid of finite element inverse analysis method with geometrical modelingare expounded. By comparing these two methods,a feasible,integrated and mod... |
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