A decision-making method for maintenance of small and medium-span concrete bridges

Abstract

The invention provides a decision-making method for maintaining middle and small span concrete bridges. The decision-making method provided by the invention comprises the following steps of: (2) determining a decision-making object and a predicated age limit, wherein the decision-making object is a bridge network OD (Outside Dimension) model; (2) indentifying the bridge network OD model: converting an image-formed OD model into a numerical-value-formed OD model and identifying a minimum path set matrix P which can be used for a decision-making calculation; (3) establishing a cost model of a maintenance policy and an effect model which can be used for processing an event tree analysis on the OD model to obtain the maintenance policy; (4) carrying out an improved non-dominated sorted genetic algorithm: defining a coding method of the maintenance policy and taking a connecting probability Rnw and a maintenance cost Cnw of the bridge connection as two targets to be participated in a genetic evolution; carrying out a Pareto optimality and searching for the globally optimal solution. The method provided by the invention has the advantages of simple principle, convenience in using, wide application range, good reliability and the like.

Description

technical field [0001] The invention mainly relates to the maintenance field of bridges, in particular to a decision-making method for medium and small-span concrete maintenance in an area. Background technique [0002] With the continuous development of the national economy, the role and status of road traffic is increasing day by day. The bridge is the throat to ensure the smooth flow of the road, and its carrying capacity and traffic capacity are the key to the communication of the whole line, which directly affects the economic and social benefits. my country has built a large number of bridges in the past 30 years. In the process of use, due to the continuous increase of vehicle load and traffic volume, the load of bridges is increasing day by day, as well as the effects and influences of various external factors, the bridge structure has diseases and defects. Serious affect its normal use. While the scale of bridges is increasing rapidly, a large number of bridges wit...

AI Technical Summary

Problems solved by technology

For the maintenance decision of a single bridge, all the strategies can be exhausted within a certain period of time and compared to obtain the optimal strategy; when the object is added to the bridge network, the possible maintenance strategies will grow geometrically with each additional bridge, resulting in the so-called Combination explosion problem, relying on the exhaustive method to find the optimal global strategy is a very inefficient and painful thing

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