In this paper, it is on the basis of gaining the main influence factors of durability for in-service bridge, using recursive hierarchical structure of analytic hierarchy process, constructing the assessment models about durability for in-service bridge in bottom, middle and top levels, combining with weight modify technology and fuzzy mathematics theory, the assessment results durability state is gained finally. It can discriminate using actuality of bridge effectively, and it has been a good guide for maintenance of bridge by practical test.
For reinforced concrete skein method to arch bridges, corresponding quality assessment system is established based on analytic hierarchy process (AHP). At the same time, the actual application process of the system was found. Structure of judging matrix, synthetic weight and for each layer of element and fuzzy comprehensive evaluation was figured out. Finally, the system is verified by practical engineering. Something is obvious as the result shows. Firstly, the comprehensive assessment system for reinforcement quality of bridges is reasonable and practical. Secondly, this system takes some advantages to the systematization, standardization and theorization for the assessment to reinforcement quality of bridges.
Based on the discussion of the quality control and management requirements for the concrete raw materials, the raw materials preservation heat in the mixing concrete process and the note in the process of transportation with the requirements both in concrete casting process and the casting vibrating process, the paper proposes the construction key technology of improving the durability of the concrete in alpine region.
In this paper, it is on the basis of gaining the main influence factors of strengthening economy for in-service bridge, using recursive hierarchical structure of analytic hierarchy process, constructing the assessment models about strengthening economy for in-service bridge in bottom, middle and top levels, combining with weight modify technology and fuzzy mathematics theory, the assessment results strengthening economic state is gained finally. By practical test, it can discriminant bridge using actuality effectively, and it has been a good guide to maintain in-service bridges safely, effectively and reasonably for maintenance administrative departments, and save a great deal fund for bridge construction cause.
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