Failure behavior monitoring and evaluation of steel-confined reinforced concrete columns by acoustic emission under quasi-static loading

Du, Fangzhu; Li, Dongsheng; Shan, Baoqing; Wang, Yanlei

doi:10.1590/1679-78255170

Cited by 6 publications

(3 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Thus, for each design of great complexity is necessary to evaluate the typology of the composite that will be used. In contrast, structural members and components need their evaluation during their serviceable life, because of critical conditions of use environmental, seismic, or fatigue, which could cause injuries in humans [1][2][3][4][5] The previous articles [6,7] showed the behavior of the acoustic signals over filament wound composite pipes, and how the position of the signal source or, in this case, the damage occurrence could be interfered with by the interlacing of opposites filaments of roving, regarding the lamination path. Three types of This paper presents the continuation of prior studies, which comprised the verification of the variation that occurred in the dynamic elastic modulus (E 11 ) regarding the three angular winding laminations described, in comparison with an isotropic material.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Elastic Modulus Variability in Anisotropic and Isotropic Materials: Comparison by Acoustic Emission

Cardim

Minillo

Nakao

et al. 2023

J. Res. Updates Polym. Sci.

View full text Add to dashboard Cite

This study compared the variation of the dynamic elastic modulus (E) of three types of composite pipes made by the filament winding process and a steel alloy specimen, according to signal source changes. The specimens were produced with three different winding angles, i.e., ±50°, ±52.5°, and ±55°. The moduli were obtained through a known signal source and the angular variation, according to two sensors positioned over the specimen's surface. In a previous article, the variation in the velocity of acoustic emission (AE) signals, performed in the same type of pipes, was discussed based on the standards for glass fiber-reinforced epoxy (GFRE) filament wound specimens. This work took these preliminary findings to compare with the results found for steel alloy pipes (SAE 1020). This data was used with appropriate equations to determine the dynamic elastic moduli of each material. It was found that, even for small angular differences, the modulus changes position concerning the lamination angle. Thus, the lower the quality control, the lower the final product with composite materials. As expected, for isotropic materials such as steel alloys, the modulus remains constant along the angles, while for anisotropic ones, it is dependent on the principal directions of stress and strain, or on the other hand, dependent on the correlation between the angular wave velocity of the AE signals.

show abstract

Section: Introductionmentioning

confidence: 99%

Dynamic Elastic Modulus Variability in Anisotropic and Isotropic Materials: Comparison by Acoustic Emission

Cardim

Minillo

Nakao

et al. 2023

J. Res. Updates Polym. Sci.

View full text Add to dashboard Cite

show abstract

“…These studies proposed formulas based on the recorded AE to predict the damage level for the examined RC elements. Moreover, AE signals were used to analyze the damage of confined circular concrete-filled steel tubular (CCFT) columns [ 20 ] and FRP-CCFT columns and showed the possibility of AE to predict initial steel yielding and to provide failure warning [ 21 ]. The AE technique was also implemented for RC beams and revealed that AE parameters increased with increasing beam thickness [ 22 ].…”

Section: Introductionmentioning

confidence: 99%

Acoustic Emission Monitoring of High-Strength Concrete Columns Subjected to Compressive Axial Loading

Eid

Muravin²,

Kovler

2020

Materials

View full text Add to dashboard Cite

Acoustic Emission (AE) nondestructive tests have attracted great interest for their use in the determination of structural properties and behavior of reinforced concrete (RC) elements. One of the applications this method can contribute to is in high-strength concrete (HSC) columns. These elements have a great advantage in the lower stories of high-rise buildings. However, the premature failure of the concrete cover and the brittleness nature of the failure is of a concern for engineers. This paper presents a study on the AE monitoring of HSC columns subjected to compressive axial loading. The study consists of four large-scale reinforced HSC columns with different confinement reinforcement and height. It is shown that the AE distributions in the columns are categorized by three stages. Moreover, the levels of loads reached at the first AE macro event are similar to the lower range levels of the nominal axial compressive strengths of the tested specimens, while the majority of macro AE events are located at the concrete cover. Based on the results of this study, AE monitoring can provide indications for the damage and load levels attained by reinforced high-strength concrete columns subjected to compressive axial loading.

show abstract

“…To the author's best knowledge, previous studies mostly focused on the mechanical behaviour, seismic behaviour, and constitutive model for steel tube confined RC structure, but the cognition of its health monitoring and damage mechanism has not been comprehensively illustrated. Du et al (2018) reported the AE monitoring and evaluating for the steel confined RC columns under seismic loading, however, the interior failure mechanisms and fracture modes was not touched. This study concentrate on the continuous AE monitoring and evaluation for STCRC columns during axial compression test.…”

Section: Introductionmentioning

confidence: 99%

Damage evaluation and failure mechanism analysis of steel tube confined reinforced-concrete columns by acoustic emission technology

Pan

2018

Lat. Am. j. solids struct.

Self Cite

View full text Add to dashboard Cite

As a new kind of composite structures and its advantages, the using of steel tube confined reinforced concrete (STCRC) columns have received increasing attention in civil engineering. Acoustic emission (AE) technique is applied to monitor the damage process of STCRC columns during an uniaxial compression test. The aim of this study is to investigate the damage evaluation and failure mechanisms of the STCRC columns from the perspective of microscopic damage. Typical AE parameters are extracted to quantify different damage condition and identify the critical point. Peak-frequency analysis classify the damage signal into groups, representing different AE generation mechanisms. Extended AE features, such as the RA value and the average frequency are calculated to discriminate the cracking modes of core concrete. The probability based Gaussian mixture model (GMM) are proposed for unsupervised damage pattern recognition. All presented AE results are good in accordance with the observed experimental outcomes. The AE technology enabled evaluating the damage condition, identifying critical point, disclosing the failure mechanism, and classifying damage modes for steel confined RC columns effectively.

show abstract

Failure behavior monitoring and evaluation of steel-confined reinforced concrete columns by acoustic emission under quasi-static loading

Cited by 6 publications

References 27 publications

Dynamic Elastic Modulus Variability in Anisotropic and Isotropic Materials: Comparison by Acoustic Emission

Dynamic Elastic Modulus Variability in Anisotropic and Isotropic Materials: Comparison by Acoustic Emission

Acoustic Emission Monitoring of High-Strength Concrete Columns Subjected to Compressive Axial Loading

Damage evaluation and failure mechanism analysis of steel tube confined reinforced-concrete columns by acoustic emission technology

Contact Info

Product

Resources

About