Vibration-Based Damage Detection for a Prestressed Concrete Box Girder by Means of Subspace Analysis

Zhao, Lei; Kim, Chulwoo; Goi, Yoshinao; Takemura, Kohei

doi:10.1061/ajrua6.0001185

Cited by 2 publications

(1 citation statement)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Results showed that variations of the first and second modal frequencies with the tension in the prestressing cables were hardly detectable until the formation of cracks in the beam. The scarce sensibility of traditional modal parameters (e.g., modal frequencies) to damage in prestressed beams is also discussed in more recent publications [16,17].…”

Section: Introductionmentioning

confidence: 99%

On the Effectiveness of Vibration-Based Monitoring for Integrity Management of Prestressed Structures

et al. 2021

View full text Add to dashboard Cite

In this paper, the effectiveness of vibration-based tests for the detection of damages for prestressed concrete beams is investigated. Despite large research efforts, discrepant and sometimes contradicting conclusions have been drawn regarding the efficacy and reliability of vibration-based monitoring for prestressed structures. Herein, a contribution to this discussion is provided by tackling the problem from a different perspective. Specifically, the question that this paper intends to answer is: “Do vibration-based tests support decision-makers in integrity management operations for prestressed elements?” The discussion is carried out by comparing the performance of prestressed and ordinary reinforced concrete beams with similar capacities. Both analytical and numerical case studies are considered. Results show that, for prestressed beams, in contrast to reinforced concrete beams, modal parameters can provide information regarding damage only when the structure is close to its ultimate conditions. This makes this information hardly useful for integrity management purposes and the effectiveness of vibration-based tests questionable for this type of structural element.

show abstract

Section: Introductionmentioning

confidence: 99%