Multi-Stage Health Diagnosis for Concrete Cable-Stayed Bridge Based on EWMA Control Chart

Zong Bao Liang; Ming Lan Sheng; Yi Ran Hu

doi:10.4028/www.scientific.net/AMM.246-247.903

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 246-247Multi-Stage Health Diagnosis for Concrete...

Multi-Stage Health Diagnosis for Concrete Cable-Stayed Bridge Based on EWMA Control Chart

Abstract:

To overcome the huge difficulties in constructing an accurately finite element model in health diagnosis of bridge, this paper presented an improved diagnosis method via exponential weighted moving average (EWMA) control chart. Firstly the characteristic of the live-load effect of main girder strain in a bridge was analyzed as a theoretical basis of the proposed strategy. Then wavelet analysis was employed to extract the live-load effect of strain from the total measurement as sensitive feature for structural health diagnosis. Finally the EWMA control chart was designed to complete the structural health diagnosis of bridge, in which the multi-stage control limits are estimated by reliability analysis. The results from application in a concrete cable-stayed bridge show significant effectiveness of the proposed method in health diagnosis of bridge.

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Periodical:

Applied Mechanics and Materials (Volumes 246-247)

Pages:

903-907

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.246-247.903

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Online since:

December 2012

Authors:

Zong Bao Liang, Ming Lan Sheng, Yi Ran Hu

Keywords:

Bridge, EWMA Control Chart, Health Diagnosis, Reliability Analysis

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References

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