Concrete life prediction method based on standard Wiener process

A life prediction, concrete technology, applied in special data processing applications, instruments, electrical digital data processing and other directions, can solve the problems of low accuracy, narrow application range, high prediction cost, reduce economic losses, universal applicability, Reliable effect

Inactive Publication Date: 2018-08-17
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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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 hi

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  • Concrete life prediction method based on standard Wiener process
  • Concrete life prediction method based on standard Wiener process
  • Concrete life prediction method based on standard Wiener process

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Embodiment 1

[0088] The present invention is based on the concrete life prediction method of standard Wiener process, such as figure 2 As shown, the specific steps of the method are as follows:

[0089] 1) Take T b =inf{t:W(t)=b,t>0}, T b Indicates the time when the dynamic elastic modulus of concrete based on the standard Wiener process reaches the safety limit b for the first time, that is, the time when the initial dynamic elastic modulus decays by 40%.

[0090] 2) Use the Pundit Plus concrete ultrasonic detector produced in the UK to detect the initial dynamic elastic modulus E of the concrete material d , take the safety limit b=40%×E d .

[0091] 3) Enter the safety limit b and the time length t.

[0092] 4) According to the formula Calculate the failure probability of the dynamic elastic modulus of concrete based on the standard Wiener process within [0,t), and use the computer software MATLAB to calculate and draw the concrete life distribution prediction curve according to...

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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...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/20G06F2119/04
Inventor 张振浩曹峰王笑胡超雄
Owner CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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