Validation of bridge health monitoring system using temperature as a proxy for damage

O’Brien, Eugene J.; Heitner, Barbara; Žnidarič, Aleš; Schoefs, Franck; Causse, Guillaume; Yalamas, Thierry

doi:10.1002/stc.2588

Cited by 19 publications

(6 citation statements)

References 30 publications

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“…In addition, the inconsistent temperature deformation between adjacent piers has an adverse effect on the comfortability and safety of high-speed train operations. Consequently, many bridges failed to complete their service life (Murphy and Yarnold, 2018; Obrien et al, 2020; Dai et al, 2017). Therefore, it is essential to correctly predict the Tu and its effects on the life of bridge piers.…”

Section: Introductionmentioning

confidence: 99%

Modelling of extreme uniform temperature for high-speed railway bridge piers using maximum entropy and field monitoring

Dai

Wang

Chen

et al. 2022

Advances in Structural Engineering

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Due to the atmospheric temperature and solar radiation, the effects of temperature variation in bridge structures should be considered. Such variation induces notable deformations and movements, jeopardizing the safety of bridges and high-speed trains operations. However, the temperature action is a random process and its distribution is difficult to determine. The existing methods for analyzing structural temperatures are insufficient to meet the precision requirement. Therefore, the accurate prediction of extreme structural temperatures relates to the accurate evaluation on the bridge safety. This paper proposes a robust and accurate model for predicting the extreme structural temperature of a bridge. A field experiment, spanning over 2 years, was carried out on a high-speed railway bridge; and the long-term (56-years) atmospheric temperature data was adopted. Probabilistic models for the structural temperature were established using the Maximum Entropy (MaxEnt) model and the Generalized Pareto distribution (GPD) model; and the predictions on the uniform structural temperature ( T u) with 50 and 100 years return periods are presented. Additionally, the performance between the MaxEnt model and the GPD model is compared, based on the estimates with different return levels. The results show that the MaxEnt model is more stable and is significantly robust to the variation of sample sizes; and indicates that the MaxEnt model reduces the uncertainty of outcomes and avoids the high risk of bias. The MaxEnt model has a great potential to the applications of the extreme value analysis with small sample size. It offers a wider applicability and helps solve practical problems.

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Section: Introductionmentioning

confidence: 99%

Modelling of extreme uniform temperature for high-speed railway bridge piers using maximum entropy and field monitoring

Dai

Wang

Chen

et al. 2022

Advances in Structural Engineering

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“…Hios et al [115] proposed a new stochastic global model method based on statistical hypothesis testing, and determined a functional hybrid model that can describe temperature-dependent dynamics. OBrien et al [116] used temperature data to validate damage indicators based on measured data collected under uncontrolled traffic conditions, and showed that temperature can be used as a proxy for damage since stiffness of concrete structure is dependent on temperature.…”

Section: Accelerationsmentioning

confidence: 99%

Review on Vibration-Based Structural Health Monitoring Techniques and Technical Codes

2021

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Structural damages occur in modern structures during operations due to environmental and human factors. The damages accumulating with time may lead to a significant decrease in structure performance or even destruction; natural symmetry is broken, resulting in an unexpected life and economic loss. Therefore, it is necessary to monitor the structural response to detect the damage in an early stage, evaluate the health condition of structures, and ensure the operation safety of structures. In fact, the structure and the evaluation can be considered as a special symmetry. Among several SHM methods, vibration-based SHM techniques have been widely adopted recently. Hence, this paper reviews the vibration-based SHM methods in terms of the vibrational parameters used. In addition, the technical codes on vibration based SHM system have also been reviewed, since they are more important in engineering applications. Several related ISO standards and national codes have been developed and implemented, while more specific technical codes are still required to provide more detailed guidelines in practice to maintain structure safety and natural symmetry.

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“…In the last decades, the structural safety of the existing infrastructure has become an important issue in Europe [10]. The reliability of the bridges is of special concern due to their indispensable role in transport connections, increase of the expected traffic load and degradation of a material due to environmental actions [10,11]. Slovenian bridges built in the second half of the twentieth century are of particular concern due to their structural system, substandard shear reinforcement, negligible concrete cover and insufficient maintenance.…”

Section: Introductionmentioning

confidence: 99%

In situ consideration of resistance of bridge girder according to EC2 with AEM

Brunčič¹,

Štrukelj²,

Kreslin³

et al. 2023

eJNDT

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The paper presents a case study of a considerably cracked and degraded bridge in Slovenia: with the implementation of in-situ measurements under bending and shear and the use of a nondestructive acoustic emission technique. Despite the existing crack system, the latter was able to detect microstructural changes. These were characterised by low values of average frequency (AF), as well as lower values of the rise time-amplitude ratio (RA), and energy. A correlation between shear capacity and acoustic activity was observed. This promises to expand the use of AE in the process of assessing of the load-bearing capacity of existing concrete structures.

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Validation of bridge health monitoring system using temperature as a proxy for damage

Cited by 19 publications

References 30 publications

Modelling of extreme uniform temperature for high-speed railway bridge piers using maximum entropy and field monitoring

Modelling of extreme uniform temperature for high-speed railway bridge piers using maximum entropy and field monitoring

Review on Vibration-Based Structural Health Monitoring Techniques and Technical Codes

In situ consideration of resistance of bridge girder according to EC2 with AEM

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