Keywords: concrete highway bridges, maintenance, modelling, information model, to-be model, information management.

Concrete highway bridges undertake important roles in infrastructure and should be safe and kept in good condition [1,2]. Maintenance management should be carried out effectively for maintaining, repairing, and rehabilitating concrete highway bridges. It is important that the business process is effective and the quality of inspection is secured in the maintenance process of concrete highway bridges. The cost-effective and quality maintenance is dependent on reliable inspection and condition assessment information. The reliable maintenance information influences the bridge management system (BMS) [3,4]. The existing BMS uses the non-standardized information, and cannot exchange, share, and re-utilize the information. The maintenance information should be standardized, and the information models are constructed.

The primary objective of this paper is to develop the framework for exchanging, sharing, utilizing the maintenance information required for the bridge maintenance. Information models for maintenance are constructed for standardizing the various maintenance data.

For constructing the information models, the present maintenance processes and the information are analyzed. The analyzed results are used for modeling the as-is process and information models. The as-is process and information models clarified the matters of the existing maintenance that (1) operations are overlapped; (2) bridge damage is treated as a symptom as each damage appears; and (3) deterioration information is not utilized. The matters are solved by (1) redefining the roles of parties concerned; (2) adopting the idea of preventive maintenance; and (3) accumulating and utilizing the inspection and condition assessment data.

The required functions are analyzed and described for to-be model as a use-case diagram in the Unified Modeling Language (UML). The to-be model is composed of the business process models and the information models. In the present paper, the information models are constructed.

The information models are composed of the member information models and the business information models, and described by using the class diagram. The member information models describe the members of the concrete highway bridges. The business information models describe the input and output (I/O) information of inspection and condition assessment. The maintenance information of information models is standardized and defined as information schema in the Extensible Markup Language (XML). The information models are useful for exchanging, accumulating, and utilizing standardized maintenance information in any BMS in the future. By using the information models, agencies and bridge engineers utilize the standardized maintenance information for their business.

1

Seki, H., "Research Activities on Maintenance of Concrete Structures", Journal of Materials, Concrete Structures and Pavements, Japan Society of Civil Engineers, 557(5-34), 1-14, 1997(in Japanese).

2

Ministry of Land, Infrastructure and Transport, "Proposal of Concept in Maintenance and Renewal of Road Structures", 2003(in Japanese).

3

Thompson, P.D., Sobanjo, J.O., Kerr, R., "Florida DOT Project-Level Bridge Management Models", Journal of Bridge Engineering, ASCE, 8(6), 345-352, 2003. doi:10.1061/(ASCE)1084-0702(2003)8:6(345)

4

Osama, A., Hussien, T.A., "As-Built Information Model for Bridge Maintenance", Journal of Computing in Civil Engineering, ASCE, 17(2), 105-112, 2003. doi:10.1061/(ASCE)0887-3801(2003)17:2(105)

5

Stein, A., "OKSTRA The Key to Road and Transport Data Foundations for a Road Information System", AsiaGIS2001, 2001.

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