Bridge fatigue damage state and residual life evaluating method

Abstract

The invention discloses a bridge fatigue damage state and residual life evaluating method which is used for evaluating fatigue damage states of a bridge on the basis of acquired strain data of a large-span bridge health testing system and estimating the residual life of the bridge through prognostic estimation. The bridge fatigue damage state and residual life evaluating method includes mutually linked steps of P1) analysis of bridge structure; P2) evaluation of the current damage state of the bridge; P3) prognostic estimation of the bridge damages; P4) evaluation of the residual life of the bridge, wherein the fatigue damage state obtained in the P2) and the residual fatigue life obtained in the P4) are evaluation results. The bridge fatigue damage state and residual life evaluating method can regularly evaluate and update the fatigue damage states of the bridge and simultaneously estimates the residual life of the bridge in the bridge operating environment, and provide reference for decision making of bridge operators. Furthermore, the evaluation results are beneficial for verification and correction design requirements.

Description

Technical field [0001] The invention belongs to the field of bridge health monitoring systems, and specifically relates to a method for evaluating bridge fatigue damage state and remaining life. Background technique [0002] The current fatigue life estimation of bridges is mainly in the design stage. In fact, it is impossible to accurately consider the actual conditions such as construction and actual load in the design stage. Therefore, how to verify the design requirements and further modify the fatigue life of the design according to the changing conditions has become a problem. [0003] On the other hand, with the development of health monitoring technology in recent years, most of the long-span bridges have installed health monitoring systems. The core functions that can be achieved in practice include system health monitoring and evaluation, design assumptions and parameters. Verification, provide information for inspection and maintenance work plans, etc. Systematic fatig...

AI Technical Summary

Problems solved by technology

[0005] Purpose of the invention: The present invention provides a method for assessing the fatigue damage state and remaining life of bridges, aiming at the defects that the systematic fatigue damage state assessment and remaining life estimation in the prior art cannot be achieved

Images