Deflection of reinforced concrete beam under low-velocity impact loads

Yu, Yongjae; Lee, Sang-Ho; Cho, Jae-Yeol

doi:10.1016/j.ijimpeng.2021.103878

Cited by 43 publications

(15 citation statements)

References 25 publications

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“…A total of 21 RC beams were utilized for the drop weight impact tests. Fifteen of those (Specimen groups 1-5) were tested by Yu et al (2021) to investigate the impact behavior and propose a predictive formula for the maximum deflection of RC beams subjected to impact loads. The other nine beams (Specimen groups 6-8) were tested by Ahn (2021) to examine the effect of flexural stiffness on the impact behavior and improve the predictive formula proposed in Yu et al (2021).…”

Section: Test Specimensmentioning

confidence: 99%

“…Fifteen of those (Specimen groups 1-5) were tested by Yu et al (2021) to investigate the impact behavior and propose a predictive formula for the maximum deflection of RC beams subjected to impact loads. The other nine beams (Specimen groups 6-8) were tested by Ahn (2021) to examine the effect of flexural stiffness on the impact behavior and improve the predictive formula proposed in Yu et al (2021). Previous studies (Chen and May 2009;Tachibana et al 2010) revealed that the variability in the results of drop weight impact tests was not significant.…”

Section: Test Specimensmentioning

confidence: 99%

“…Moreover, the displacement ductility also decreased with an increase in the impact energy. Despite the efforts of these previous studies, except for one test case conducted by Dok et al (2020), the impact energy level used in the previous studies was less than 10 kJ, which is low compared with that of actual accidents, such as rockfalls, which can have impact energies above 50 kJ (Yu et al 2021). Furthermore, there have been insufficient experiments on the residual performance of RC members subjected to impact loads.…”

Section: Introductionmentioning

confidence: 99%

“…Some methods have been suggested to explain the impact mechanism based on a mass-springdamper model and effective length (Cotsovos 2010;Fujikake et al 2009). Several studies have suggested deflection predictions to evaluate impact resistance (Ahn 2021;Kishi and Mikami 2012;Tachibana et al 2010;Zhan et al 2015;Yu et al 2021). However, structures damaged by impact loads do not always collapse; therefore, rescue or rehabilitation work for impact-damaged structures is required.…”

Section: Introductionmentioning

confidence: 99%

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Residual Performance of Reinforced Concrete Beams Damaged by Low-Velocity Impact Loading

Lee

Ahn

et al. 2023

J. Struct. Eng.

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With the advancement of material science and infrastructure design technology, there is an increased need to reflect various loading scenarios in the design of civil infrastructures, including extreme loads such as impact and blast. However, structural behavior under extreme loads has been observed to be very different from that under static loads due to the high-rate loading condition. Therefore, extensive experimental and analytical studies have been conducted to explain the structural behavior under impact loading. From these efforts, various discussions have been presented on the impact behavior and the evaluation of the impact resistance of structures. However, despite the fact that the repair or reinforcement of structures damaged by impact loads is a critical issue, studies of the residual performance of impactdamaged structures are insufficient. This paper presents an experimental study to improve the understanding of the residual performance of impact-damaged structures. A total of 29 RC beams were tested under static loads to examine the effect of impact-damage on the residual behavior of RC beams. Of these, 8 RC beams were intact, and the other 21 RC beams suffered impact loading through drop weight impact tests and were damaged prior to the static flexural tests. The residual performance was evaluated by comparing the maximum load capacity, flexural stiffness, and displacement ductility of impact-damaged beams and intact beams. The comparison indicated that the flexural stiffness and displacement ductility of the impact-damaged RC beams decreased significantly, whereas their flexural strengths did not exhibit a significant difference. Predictive models for flexural stiffness and displacement ductility of the impact-damaged beams were suggested from the test results, and through these, the residual performance of the impact-damaged structure could be evaluated.

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Section: Test Specimensmentioning

confidence: 99%

Section: Test Specimensmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Residual Performance of Reinforced Concrete Beams Damaged by Low-Velocity Impact Loading

Lee

Ahn

et al. 2023

J. Struct. Eng.

Self Cite

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“…Instrumental measurements allow to observe the vertical and horizontal deformations of superstructures and supports. Those measurements allow to timely the detect hidden defects that cannot be discovered during the inspection, help explain the appearance of defects found during the inspection, as well as choose the most correct ways to repair and strengthen the structure [9][10].…”

Section: Resultsmentioning

confidence: 99%

Ensuring Operational Reliability of Overpass On "Almaty-Kapshagai" Highway Section in Kazakhstan

Jalairov¹,

Kumar²,

Kassymkanova³

et al. 2022

Komunikácie

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The article presents results of the overpass condition survey, technical survey, static tests and assessment of the structure operational reliability, a doubledecker overpass on Almaty-Kapshagai highway section in Kazakhstan. Technical survey determined the dimensions of the overpass, the camber of reinforced concrete superstructures main beams and checked the values of the overpass roadway actual transverse and longitudinal slopes. The calculation and analytical assessment of the overpass load-bearing structures, for the strength of the bending moment, are performed. Static tests of the overpass split beam superstructure of a length of 33.0m were conducted. Trucks loaded with ballast were accepted as a test load.

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Experimentelle Untersuchung von Stahlbetonbalken ohne Bügelbewehrung unter Stoßbelastung

Máca,

Leicht,

Schubert

et al. 2024

Beton und Stahlbetonbau

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Versuche an Stahlbetonbalken ohne Bügel dienen häufig als vereinfachte Grundlage zur darauf aufbauenden numerischen Simulation von Stahlbetonplatten. In diesem Beitrag wird eine experimentelle Studie des Verhaltens von Stahlbetonbalken unter Stoßbelastung vorgestellt. Die Versuche wurden im 11 m hohen Fallturm des Otto‐Mohr‐Laboratoriums der TU Dresden mit zylindrischen Impaktoren von 100 mm Durchmesser durchgeführt, welche mit Druckluft auf Geschwindigkeiten zwischen 2,7 m/s und 25,8 m/s beschleunigt wurden. Die verwendeten Impaktoren wogen 14,22 kg und 21,66 kg. Die Impaktor‐ und Auflagerkräfte, die Balkenverschiebungen und ‐beschleunigungen wurden an ausgewählten Stellen erfasst. Die Sensordaten wurden durch digitale Bildkorrelation (DIC) ergänzt. Die Balken wiesen je nach Aufprallgeschwindigkeit und ‐masse unterschiedliche Versagensarten auf. Scherrisse bildeten sich ab Aufprallgeschwindigkeiten von etwa 11 m/s, was beim leichteren Impaktor einer kinetischen Impaktorenergie von 860 J entspricht. Unter Aufprallgeschwindigkeiten von etwa 22 m/s wurde die Bildung eines Durchstanzkegels in der Nähe des Belastungspunkts beobachtet. Diese Ergebnisse liefern wichtige Erkenntnisse zur Bewertung von Stahlbetonbalken ohne Querkraftbewehrung unter Impaktbelastung. Weiterhin dienen die Ergebnisse der Verbesserung von numerischen Modellen, sodass diese präziser und verlässlicher komplexe Großstrukturen abbilden können.

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Deflection of reinforced concrete beam under low-velocity impact loads

Cited by 43 publications

References 25 publications

Residual Performance of Reinforced Concrete Beams Damaged by Low-Velocity Impact Loading

Residual Performance of Reinforced Concrete Beams Damaged by Low-Velocity Impact Loading

Ensuring Operational Reliability of Overpass On "Almaty-Kapshagai" Highway Section in Kazakhstan

Experimentelle Untersuchung von Stahlbetonbalken ohne Bügelbewehrung unter Stoßbelastung

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