Identifying the Factors Affecting the Ranking of Reinforced Concrete Beams Using Multi-Criteria Decision-Making Approaches under Conditions of Uncertainty

This research was carried out with the aim of identifying the effective factors in the construction of Reinforced Concrete (RC) beams. The current research was applied from the point of view of the objective and descriptive survey from the point of view. The statistical population of the research included all experts in the construction industry, from which 10 experts were selected for weighting and choosing the best strategy. In this research, data analysis was done using the Swaraphazi method to determine the weight of criteria, and the Electra method was used to choose the best strategy for reinforcing RC beams. The findings of the research showed that the order of importance of the criteria in the selection of reinforcement strategies for RC beams is as follows: time (C1) with a weight of 0.33 ranks first, cost with a weight of 0.22 (C4), high volume of operations (C5) with a weight of 0.15 ranks third, compatibility with climate (C2) with a weight of 0.1 in the fourth rank is the information of the employer, consultants and contractors (C3) with a weight of 0.062 in the fifth rank, the effectiveness of quality (C10) with a weight of 0.043 in the sixth rank, separation of the reinforcing page (C6) with a weight of 0.028 in the rank seventh, expert people (C7) with a weight of 0.019 in the eighth place, access to material C12 with a weight of 0.012 in the ninth place, the possibility of creating the required coverage C11 with a weight of 0.008 in the tenth place, the complexity of calculations C9 in the eleventh place and C8 transport were ranked 12th. Also, the results of Electra analysis showed that the best strategy for strengthening concrete beams was to use Glass Fiber Reinforced Polymer (GFRP) composites and to use Sisal Fiber Reinforced Polymer (SFRP)composite.