Safety Evaluation of Steel Temporary Beam Service Status Based on the Combination Weighting‐Fuzzy Model of Game Theory

Abstract

The safe service state of railway steel girders directly affects the safety of frame bridge jacking and the operation of existing lines. For this reason, this paper first adopts a dynamic and static method to analyze the deflection, acceleration, and stress value of temporary steel beams, personnel factors, management factors, and environmental factors. In terms of factors, a safety evaluation index system for the service status of the beams is established, and then, the subjective and objective weights of the indicators are determined by the analytic hierarchy process (AHP) and the coefficient of variation method. The combined weights of the indicators are calculated by introducing game theory. Finally, the fuzzy comprehensive evaluation model is used to obtain the security level of the beam service status. The weight of the indicators that affects the safety of the service state of the beam and the order of risks can be obtained through the calculation. For the indicators ranked first, measures such as increasing the amount of monitoring can be prioritized to reduce the possibility of safety accidents in frame bridge jacking construction and existing line operation.

Comprehensive Evaluation of Green Bridge Construction Based on a Game Theory–Radar Chart Combination

“…(4) According to Equation ( 15), we can calculate (α 1 , α 2 , ..., α s ), and then this is normalized to obtain the weighting coefficients [32].…”

“…The distance S i + , S i − between each object to be evaluated and the positive and negative ideal solutions could be calculated from Equations (30) and (31). Finally, the relative closeness G i of each construction solution to the positive ideal solution was obtained from Equation (32), and the evaluation results of the five green construction solutions are listed in Table 11. As can be seen from Table 11, the relative closeness of these five schemes was 0.3539, 0.7843, 0.4280, 0.6216, 0.2531.…”

Hydropower unit health assessment based on a combination weighting and improved fuzzy comprehensive evaluation method

“…Also, due to its lack of objectivity, this paper applies the CRITIC method (Krishnan et al, 2021;Wen et al, 2022) to calculate its objective weights through historical health samples. However, subjective weights or objective weights cannot fully represent the weights of the indicator, in order to allocate the rationality of the weights, the method of game theory (Li H. et al, 2022;Li et al, 2023) is introduced to calculate the optimal weights, so as to make its weight allocation more reasonable.…”