Method for predicting and evaluating concrete strength deterioration under ocean environment

Abstract

The invention provides a method for predicting and evaluating concrete strength deterioration under an ocean environment. The method comprises the steps of detecting data of strength deterioration of concretes in different ratios under the ocean environment along with age through experiments; dividing the obtained operating data into a training group and a testing group, wherein factors which influence the concrete strength are used as a factor attribute set, and a strength deterioration state is used as a deterioration result attribute set; modeling a decision-making tree: selecting an output branch according to an attribute value of a corresponding attribute until a leaf node is reached, andoutputting an operating category for storing the leaf node as an analysis result; evaluating a model performance; and cutting branches of the established decision-making tree by use of a C4.5 algorithm. For complex concrete service environment deterioration conditions and final deterioration state responses, a final decision-making tree diagram is obtained by use of an ID3 algorithm, branches of the decision-making tree are reduced by use of the C4.5 optimization algorithm, the performance of the decision-making tree can be obviously improved, the concrete strength deterioration state under the ocean service condition is predicted and evaluated, an instant message of building strength deterioration can be obtained, and the risk caused by damage to building durability is assessed 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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