Effect of Temperature Variation on Vibration Monitoring of Prestressed Concrete Girders

Huynh, Thanh‐Canh; Park, Young-Hwan; Park, Jae-Hyung; Hong, Dong-Soo; Kim, Jeong-Tae

doi:10.1155/2015/741618

Cited by 6 publications

(3 citation statements)

References 16 publications

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“…Simultaneously, actual structures are often affected by environmental factors, such as temperature variations and weather changes, which have an impact on the performance of damage identification. Studies shown that the temperature variations will cause the vibration features of structures, which make inaccurate damage identification (Huynh et al, 2015 and Huang et al, 2020a). Considering the temperature variation, the relationship between the ambient temperature and Young’s modulus is shown in Figure 2 (Huang et al, 2018b).…”

Section: Methodsmentioning

confidence: 99%

Two-stage damage identification method based on fractal theory and whale optimization algorithm

Huang

Wan

Cheng

et al. 2022

Advances in Structural Engineering

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Structural damage identification based on time domain method of vibration response has been widely developed in the recent decades, however, it still confronts some difficulties, such as measurement noise and model error. This paper proposes a novel two-stage damage identification method based on fractal dimension and whale optimization algorithm (WOA). In this study, based on vibration data, the difference in curvature of fractal dimension (DCFD) is used as the damage index to identify the location of suspicious damage elements in the first stage. A new objective function is proposed based on the curvature of fractal dimension (CFD) of acceleration signal, and the WOA is used to estimate the severity of the suspicious damaged element in the second stage. Firstly, the validity of the proposed method is verified by a numerical simply supported beam, and the results exhibit good damage identification ability. Then different noise levels (5% ~ 20%) are introduced into the dynamic responses to verify its robustness, the result shows that the method is of good anti-noise ability in the first stage. Although the second stage is slightly sensitive to noise, it can still effectively identify the severity of damage. Secondly, the vibration testing of a steel I-beam is designed to verify the rationality of the method in the application of actual structure. Finally, based on the simulated vibration test data of the I-40 Bridge, the applicability of the method to complex civil structure is verified, which shows that the method still has good ability to identify the location and severity of damage in complex structure and is of great significance in practical application.

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Section: Methodsmentioning

confidence: 99%

Two-stage damage identification method based on fractal theory and whale optimization algorithm

Huang

Wan

Cheng

et al. 2022

Advances in Structural Engineering

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“…This is further complicated by the global nature of vibration monitoring because other types of damage and change of boundary conditions can result in changes in natural frequencies. Moreover, natural frequencies can vary significantly due to environmental changes and lack of ideal supports; one study reports a 6% change, whereas another reports up to 18% change . In comparison, changes in frequency due to prestress losses are insignificant and may not be detected …”

Section: Vibration Methodsmentioning

confidence: 99%

Monitoring of prestressing forces in prestressed concrete structures—An overview

Abdel-Jaber

Glišić

2019

Struct Control Health Monit

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This paper presents an overview of currently available methods for monitoring prestressing forces in prestressed concrete structure. Structural health monitoring has become an increasingly important tool for assessment of structural performance. Additionally, the value of the prestressing force represents an important parameter in prestressed concrete structures. Thus, several methods for monitoring prestress forces have emerged. This paper aims to consolidate the work performed in the area of prestressing force monitoring by presenting the most important advances and the directions for future research. The methods presented in this paper are based on indirect monitoring of the prestressing force through monitoring of another relevant parameter. They are divided into five general classes based on the relevant parameter they monitor:(a) vibration-based methods (based on acceleration), (b) impedance-based methods (based on electrical impedance), (c) acoustoelastic methods (based on wave velocity), (d) elasto-magnetic methods (based on magnetic permeability), and (e) strain-based methods (based on strain). The paper presents a table summarizing the comparison between the methods based on defined criteria.

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“…For vibration-based techniques, the methods have been successfully applied to determine prestressing force cable using measured frequencies [5,6]. It is found that measured natural frequencies were significantly changed under environmental temperature variations [7,8].…”

Section: Introductionmentioning

confidence: 99%

Impedance-based Identification of Strand Looseness in Multi-strand Anchorage under Temperature Effects

Dang,

Phan,

Ngo

et al. 2023

IOP Conf. Ser.: Mater. Sci. Eng.

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In this study, strand looseness in a multi-strand anchorage is identified using measured impedance features of the PZT (Lead zirconate titanate) interface array under temperature effects. Firstly, a PZT-interface method for impedance monitoring in prestressed structures is briefly described. Secondly, a finite element model of multi-strand anchorage equipped with a PZT array is established to analyze the effects of prestress loss and temperature changes in impedance features. Thirdly, variations in simulated impedance signals are quantified using statistical damage metrics for damage detection in the analyzed structure. Last, a test on real-scale multi-strand anchorage is conducted to measure impedance signatures of the PZT interface under temperature fluctuation and prestress loss. The measured signals are then quantified using damage metrics for prestress looseness monitoring. The result reveals that environmental changes cause significant changes in PZT interfaces’ impedance features and affect strand looseness monitoring results.

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Effect of Temperature Variation on Vibration Monitoring of Prestressed Concrete Girders

Cited by 6 publications

References 16 publications

Two-stage damage identification method based on fractal theory and whale optimization algorithm

Two-stage damage identification method based on fractal theory and whale optimization algorithm

Monitoring of prestressing forces in prestressed concrete structures—An overview

Impedance-based Identification of Strand Looseness in Multi-strand Anchorage under Temperature Effects

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