Civil engineering structure reliability evolution and residual life prediction method

A civil engineering structure and life prediction technology, applied in design optimization/simulation, special data processing applications, instruments, etc., can solve problems such as failure to comprehensively consider structural performance degradation reliability, many influencing factors, long time span, etc.

Active Publication Date: 2017-02-15
FUZHOU UNIV
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Problems solved by technology

[0010] 1) The influence of uncertainty is not considered in the structural life prediction
There are many factors affecting the safety performance of the structure, and the time span is long. During the period, it is affected by many uncertain factors, so that the evaluation of structural reliability will

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  • Civil engineering structure reliability evolution and residual life prediction method
  • Civil engineering structure reliability evolution and residual life prediction method
  • Civil engineering structure reliability evolution and residual life prediction method

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[0053] The technical solution of the present invention will be specifically described below in conjunction with the accompanying drawings.

[0054] Such as figure 1 As shown, a method for reliability evolution and remaining life prediction of a civil engineering structure of the present invention, firstly, judge the possible control section of the structure according to numerical analysis or mechanical knowledge; secondly, assume that each parameter obeys the distribution according to the statistical results of the initial design information , and thus calculate the probability distribution of structural resistance and load; thirdly, calculate the stiffness attenuation coefficient D(i) under the influence of load, shrinkage and creep; further, update the structural resistance distribution function, and thus obtain the resistance at this time probability distribution, and obtain the reliability-load curve relationship; then, establish the reliability-time curve to predict the r...

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Abstract

The invention relates to a civil engineering structure reliability evolution and residual life prediction method. The method comprises the following steps of: firstly, judging possible control sections of a structure according to numerical value analysis or mechanical knowledges; secondly, assuming distribution obeyed by each parameter through a statistical result of initial design information, and then calculating probability distribution obeyed by resistance and load of the structure; calculating a rigidity attenuation coefficient D (i) under the influences of the load, shrinkage and creep; furthermore, updating a resistance distribution function of the structure to obtain resistance probability distribution at the moment and obtain a reliability-load curvilinear relationship; establishing a reliability-time curve and predicting residual service life of the structure after undergoing load steps; and finally, combining actually measured information to continuously updating the residual life prediction result, and taking a shortest life value of each control section as the residual service life of the whole structure.

Description

technical field [0001] The invention relates to a reliability evolution and remaining life prediction method of a civil engineering structure. Background technique [0002] In order to evaluate the service performance of engineering structures in the whole life cycle (including design, construction, operation, etc.), a large number of researches have been carried out on the whole life analysis methods of structures at home and abroad. The service life of a structure is related to many factors such as material performance, detailed structure, exposure state, deterioration mechanism and their combined effects, so it is difficult to quantitatively analyze. At the same time, because the influence mechanism of the combined effect is quite complex, the current prediction of the service life of structures usually only considers a certain main factor, and the prediction methods used involve many disciplines. Existing structural life prediction methods are mainly based on experience...

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/13G06F30/20G06F2119/04
Inventor 方圣恩谭佳丽
Owner FUZHOU UNIV
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