Study On Highway Bridges Maintenance Management Oriented To Domain Engineering

The investment on national infrastructure construction has been enhanced constantly for years. As people lay high requirements on highway bridge maintenance management, many High Bridges Maintenance Management Systems (HBMMS) have been developed from the mid-80s of last century, which has played an important role in fields of bridges file management, technical condition monitoring, technical condition assessment as well as maintenance strategies. It effectively promotes intelligent, scientific and refinement highway bridges maintenance management. However, existing construction and usage of HBMMS still have problems as repeated construction, without uniform standards as well as difficult to connect and share information. The development of HBMMS does not form a unity. Independent development enables resource sharing into empty and causes losses on human, finance and time. It is also difficult to make scientific and rational maintenance decisions.The research introduces idea of software reuse in software engineering into development and construction of HBMMS. The domain engineering analyzing method was used to perform detail analysis and design on HBMMS, such as domain modeling, bridge maintenance domain models construction, and general components for bridge maintenance management development as well as reuse of main functions in the system. The implementation of HBMMS based on components and domain engineering methods can achieve higher development result, more stable performance.The paper mainly address following aspects:1. Research on related theory and methods of domain engineering in the software engineering. The research bound of domain engineering was determined by defining concepts related to domain engineering. The phases of domain engineering were analyzed to determine role of domain participants in different domain engineering phases. The relationship between domain engineering and application engineering as well as software reuse was emphasized to distinguish domain engineering aiming at all problems in the domain and application engineering aiming at specific application, as well as software reuse at different levels. Since there is not such a kind of domain engineering method and modeling toll suit for domain engineering currently. The selection of domain engineering method should combine software development process and measure adaption from to be obtained revenue. Combining with requirements of bridge maintain management domain system on domain engineering method, UML was selected as domain engineering method.2. Architecture design on highway bridge maintenance management system based on domain engineering. Firstly, by defining domain area, operators interact with application system as well as establishing domain dictionary, the context model of highway bridge maintain management system was determined. Using UML domain engineering method as tool, the use case of system management staff and business management staff implement on domain system were analyzed and designed. Based on established domain use case model and referring to typical need information source, the common and individual needs of the typical sample application systems were collated and analyzed to identify their character and individuality, thus determine requirement model of bridge maintenance management domain application system. The clustering method was used to perform classification and aggregation on requirement information so as to arrive at feature model of domain application system. Secondly, the mandatory features, optional features and alternative features can be determined by combining need feature tree constructed in the domain analysis phase. The refinement relations were established to get domain feature tree for preliminary domain variability design. Finally, the method to implement domain architecture and components were determined. As to sample system existed for practice some time, re-engineering technique was used to extract needed component. As to some specific domain architecture and components, different forms can be used for implementation as source code, DLL and etc.3. Implement bridge maintenance information system based on component technique and visual development platform. Firstly, the database design, function design and structure design were conducted using obtained bridge maintenance management domain architecture in accordance with requirement analysis of application system. Large full component GIS development platform SuperMap Objects 6R was used as geographic information component platform, thus the hardware configuration and software environment were determined. Secondly, the database is divided into spatial databases, non-spatial databases and user information database based on needs of overall system design and application of system. The SuperMap Objects dataset and ADO control were used to develop spatial database component and non-spatial database component respectively. Thirdly, the bridge structural abnormalities state was recognized based on BP neural network technology. Assess the situation by establishing a bridge defect hierarchical model, judgment matrix, single sort and total ordering, as well as consistency checking and other steps to establish evaluation model based on AHP established. The D-S evidence method is used to fuse determined abnormal structure with neural network, defect condition assessment using AHP, carrying capacity assessment according to multi-level fuzzy function we well as bridge condition assessment using gray theory to get comprehensive health assessment of the bridge. Since the impact of changes in the structure and the technical condition of the bridge for many reasons, more in line with the conditions of use Markov chain model to predict the service life prediction model based on Markov chain components of the bridge. Finally, according to the actual needs of the highway bridge maintenance, basic map operation, maintenance information management, technical condition assessment, conservation decision-making and reporting and charting features such as library components were designed and implemented to lay foundation for offering modular components to practical engineering application.The main innovations are mainly reflected in three aspects:(1) The research is carried out with multidisciplinary knowledge from bridge construction, maintenance engineering, systems science, management science, computer science and others. The idea of software reuse is introduced into construction of HBMMS to achieve incremental development.(2) The idea, theory and method of domain engineering is firstly applied for completed domain analysis, domain design and domain implementation of HBMMS. A set of solution for HBMMS domain engineering is achieved. With this schema, the domain engineering process can be executed on highway bridge maintenance to construct its domain structure.(3) A practical application system is designed in application engineering based on highway bridge maintenance domain architecture and component technology, using database component, model dataset component, function database component. A method for comprehensive bridge health status evaluation based on information fusion was proposed creatively, which is of some theoretical and practical significance to improve scientific level of bridge maintenance management.The research shows that it is feasible to introduce domain engineering method from software engineering into construction of HBMMS. It can also promote its construction to develop for standardization and scientific. The waste caused by repeated development can be effectively reduced and work efficiency of bridge maintenance management can also be improved. the Digital Bridge will provide development and construction of HBMMS with more extensive and retrieval information processing and supporting platform to promote information of bridge maintenance management.