Abstract
The present work proposes a fuzzy analytical hierarchy approach for decision making in the maintenance programming of masonry arch bridges. As a practical case, we propose to classify the degradation state of the Mohammadia masonry bridge. A large number of criteria and sub-criteria are combined to classify this type of bridges through visual inspections. The main criteria (level 1) considered in this work are the history of the bridge, the environmental conditions, the structural capacity and the professional involvement of the bridge. In addition, these criteria are subdivided into several sub-criteria (level 2) which are, in turn, subdivided into sub-criteria (level 3). Considering these criteria and sub-criteria, weights Wiare calculated by fuzzy geometric mean method of Buckley. Subsequently, expert scores were assigned to calculate the overall score CS reflecting the degradation of the considered infrastructure. Thereafter, the masonry arch bridges are classified respecting the French IQOA scoring system using the overall scores value CS. The proposed classification method gave similar results provided by an expert’s study realized previously as part of a national patrimony preservation policy. The obtained results are in good agreement, which makes this method an effective scientific tool for decision-making in view of prioritization of the maintenance after systematic inspection of masonry bridges such as the bridge studied in this work. Doi: 10.28991/cej-2021-03091770 Full Text: PDF
Highlights
Masonry bridges constitute a significant heritage within the road network
We propose to classify the degradation state of the Mohammadia masonry bridge
This study aims to develop a numerical model based on the Fuzzy Analytical Hierarchical Process (FAHP) method to assess the condition of masonry arch bridges
Summary
Masonry bridges constitute a significant heritage within the road network. The average life of these structures exceeds, on average, a century of service. The management of this heritage is essential through rigorous monitoring and regular maintenance This inspection task proved to be very complex, given the large number of factors and the complex nature of the decision-making problem [1]. In this context, early in 1980’s, Saaty [2] proposed an Analytical Hierarchy Method (AHP) to solve the problem of decision-making complexity. Early in 1980’s, Saaty [2] proposed an Analytical Hierarchy Method (AHP) to solve the problem of decision-making complexity This latter used the hierarchical structure that helps experts to make a simple classification. A scoring system is combined to help engineers establish a bridge reinforcement scheme using the AHP approach [11,12,13]
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