Concrete life prediction method based on standard Wiener process

Abstract

The invention discloses a concrete life prediction method based on a standard Wiener process. The method comprises the steps of firstly, enabling Tb=inf{t:W(t)=b, t>0}, enabling W(t) to represent a durability degradation amount of concrete at a t moment; detecting an initial dynamic modulus of elasticity Ed of a concrete material, enabling a safety margin b=40%*Ed; inputting the safety margin b and a time length t, calculating a failure probability Pf of the concrete dynamic modulus of elasticity based on the standard Wiener process within the time of [0,t) according to a formula as shown in the specification, calculating and drawing a concrete life distribution prediction curve according to calculation formula programming through computer software MATLAB, thereby evaluating a service lifethereof. The concrete life prediction method with wide application range, high reliability, convenient calculation, efficiency and low prediction cost is established.

Description

technical field [0001] The invention relates to the technical field of civil engineering, in particular to a concrete life prediction method based on a standard Wiener process. Background technique [0002] In the field of civil engineering, accurate prediction of concrete life is very important, which can ensure the safe use of structures and reduce preventable economic losses. Due to China's vast territory and complex and changeable climate environment, it is impossible to use uniform parameters or standards to predict the life of concrete, so the conclusions drawn are not consistent, and because of the limitations of the research methods, there is no concrete life prediction method in the field. Deep research. [0003] At present, the existing concrete life prediction methods based on small areas or specific conditions include: concrete life prediction methods based on damage evolution equations, and concrete life prediction methods based on fly ash air-entraining agents...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a concrete life prediction method based on the standard Wiener process, to solve the problems of narrow application range, low accuracy, complex calculation and high prediction cost in the prior art, and to realize the establishment of a wide applicable and credible method. Concrete life prediction method with high degree, simple calculation, high efficiency and low prediction cost

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