A prediction and evaluation method for concrete strength deterioration in marine environment

Abstract

The invention provides a method for predicting and evaluating the strength degradation of concrete in a marine environment. Through experiments, the data of the strength degradation of concrete with age in a marine environment under different proportions is detected, and the obtained operating data are divided into a training group and a test group. The factors that affect the concrete strength are taken as the factor attribute set, and the state of strength degradation is taken as the deterioration result attribute set, and the decision tree modeling is carried out, and the output branch is selected according to the attribute value of the corresponding attribute until it reaches the leaf node, and the operation category stored in the leaf node is As the output of the analysis results, the performance of the model is evaluated and the established decision tree is pruned using the C4.5 algorithm. Aiming at the degradation conditions of complex concrete service environment and the final degradation state response, the present invention uses the ID3 algorithm to obtain the final decision tree diagram, and uses the C4.5 optimization algorithm to reduce the branches of the decision tree, which can significantly improve the performance of the decision tree and is better Prediction and evaluation of the concrete strength degradation state under marine service conditions can be made, so that real-time information on the degradation of building strength can be obtained, and the danger caused by the durability damage of buildings can be evaluated in advance.

Description

technical field [0001] The invention relates to a concrete strength prediction method, in particular to a concrete strength prediction method in a marine environment. Background technique [0002] With the development of the economy, a large number of construction projects are carried out in the marine environment. In the marine environment, Mg 2+ Concentration, SO 4 2- Concentration, Cl - The coupling effect of concentration, temperature and other factors leads to the degradation of concrete performance, especially the degradation of strength, so that the durability of concrete buildings in marine environment has become a concern of researchers. The prediction and evaluation of the service state of concrete strength in the marine environment is of great significance for the safety judgment of concrete structures and the prediction and design of the service life of buildings. Due to the complexity of various factors, mutual coupling and inevitable accidental factors, it...

AI Technical Summary

Problems solved by technology

However, in the actual service environment of concrete, it is very difficult to fully consider the impact of changes in the service environment and material components on the performance of concrete, and to explore its potential explicit logical relationship.

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