Impact Response of Reinforced Concrete Columns with Different Axial Load under Low-Velocity Impact Loading

Tantrapongsaton, Warakorn; Hansapinyo, Chayanon

doi:10.4028/www.scientific.net/kem.803.322

Cited by 4 publications

(3 citation statements)

References 10 publications

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“…Table 3 summarizes the detail of the material model used in this study. The mentioned material models were evidently used in research and were verified against the experimental results [7,8,33,34], which proved that these material models were able to simulate the behavior of the RC members under impact load effectively.…”

Section: Materials Modelingmentioning

confidence: 77%

Nonlinear Response of RC Columns Subjected to Equal Energy-Double Impact Loads

et al. 2022

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Defining the damage and deflection from impact by using only the impact energy could be misleading due to the effect of impact momentum. In addition, reinforced concrete columns might be subjected to repeated impact loading. Hence, this study presents the numerical simulation of 16 RC columns with identical sizing and reinforcement details, subjected to equal energy-double impact loadings using a free-falling mass at midspan. The impact energy was kept constant for both impacts. For each analysis, the impact momentum was varied by varying the velocity and mass of the impactor. The axial load ratios of the columns are between 0.0 to 0.3 of the compressive strength of the concrete cross-section. The results clearly addressed the momentum effect on the impact responses. The momentum level affected the specimens’ damage behavior under the same input impact energy. A high momentum impact yielded more global flexural damage with large deflection, and a low momentum impact produced more local damage with a slight deflection. The axial load helps maintain the impact resistance capacity. However, the failure determined by the flexural damage pattern under the first impact was changed when subjected to the second impact to the shear mode with the presence of axial load. Further, the colliding index considering the momentum was used in the deflection prediction equation. The proposed equation improved the deflection calculation accuracy of reinforced concrete beams under equal energy but different momentum impact.

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Section: Materials Modelingmentioning

confidence: 77%

Nonlinear Response of RC Columns Subjected to Equal Energy-Double Impact Loads

et al. 2022

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“…Due to the cost and time, numerical simulation has been widely adopted as a tool to investigate the impact response of reinforced concrete members [12][13][14][15][16]. Tantrapongsaton et al [12] adopted LS-DYNA with material models accounting for high strain effect to analyze the impact responses of reinforced concrete beams.…”

Section: Introductionmentioning

confidence: 99%

“…The presence of axial load on the reinforced concrete member significantly influences the impact resistance [14]. Chen et al [15] numerically investigated the prestressed RC beam subjected to blast loading using LS-DYNA code.…”

Section: Introductionmentioning

confidence: 99%

Residual Strength of Reinforced Concrete Beams under Sequential Small Impact Loads

et al. 2021

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Sequential small impact loads may not collapse structures directly but could weaken the strength of structures. This study aimed to investigate the impact of these sequential small impact loads on the strength of the reinforced concrete beams. First, six sequential impact loads were applied to the test specimens. Then, the residual static capacity of the impacted specimens was determined by the ultimate static load test, compared with those of undamaged specimens. The experiment was composed of 12 specimens having identical dimensions. The variable parameters were the magnitude of the axial load and shear reinforcement. Under the sequential small impacts, the axial load improves the impact performance. It reduces the tensile strain of the longitudinal reinforcement. Hence, the flexural tensile crack propagation is limited. In addition, the local damage at the impact location is minimized and the shear plug induced diagonal shear crack is prevented. The axial force is also able to diminish the adverse effect of the large spacing stirrups. Large impact load could alter the failure of a designed flexural critical reinforced concrete beam without axial load to the shear failure. Although the axial load improves the impact response, the Residual Resistance Index (RRI) decreases with axial load. For the damaged specimens with axial load, the ultimate static load is lower than the calculated concrete shear capacity and more severe diagonal shear cracks were found. It can be obviously said that the prior impact damage decreases the concrete shear capacity.

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Numerical Investigation of Bundled RC Column under Impact Load

Abay

Aure

2021

Advances in Civil Engineering

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Dynamic impact load has an extensive application area in civil engineering, including highway, military, and marine structures. Many researchers have studied the performance of reinforced concrete (RC) columns under impact load. However, very limited work has been conducted on the effect of bundle reinforced concrete (BRC) columns subjected to lateral impact load. In this study, to examine the behavior of RC columns under impact load, numerical simulations of one with normal reinforcement distribution and three different bundles of reinforced concrete column specimens have been conducted using an explicit finite element (FE) analysis. In addition to the bundle reinforcement distribution, the parameters considered in the study are impact scenarios, impact velocity, pure axial load, and impact locations. From the numerical analysis, it has been found that bundling of longitudinal reinforcement does not only improve the impact capacity but also stabilizes the fluctuating response of impacted reinforced concrete columns. Both peak impact force and maximum lateral displacements of impacted BRC columns increase with increasing initial impact velocity. The numerical results also show that pure axial load slightly improved the impact capacity of the BRC columns. Finally, while the global failure of the RC column governs the response of repeatedly impacted BRC columns, failure characteristics of the single impacted columns are associated with local concrete damage at the impact zone.

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Impact Response of Reinforced Concrete Columns with Different Axial Load under Low-Velocity Impact Loading

Cited by 4 publications

References 10 publications

Nonlinear Response of RC Columns Subjected to Equal Energy-Double Impact Loads

Nonlinear Response of RC Columns Subjected to Equal Energy-Double Impact Loads

Residual Strength of Reinforced Concrete Beams under Sequential Small Impact Loads

Numerical Investigation of Bundled RC Column under Impact Load

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