Flexural Reinforced Concrete Members With Minimum Reinforcement Under Low-Velocity Impact Load

Tantrapongsaton, Warakorn

doi:10.21660/2018.46.str107

Cited by 10 publications

(4 citation statements)

References 12 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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“…21 Failure behavior of an RC column under mid-span impact load [124] areas may also be subjected to impact loads arising from the falling objects and rocks. Hence, many researchers have attempted in the literature investigating the impact forces, structural responses, and failure behaviors of RC beams analytically [2,[159][160][161][162][163][164], numerically [1,[165][166][167][168][169][170][171][172][173][174][175][176], and experimentally [18,20,166,[177][178][179][180][181][182][183][184][185][186][187] under low-rate [1,2,171,175,185,187] and relatively high rate [188][189][190][191] impact loads by focusing on the influence of the structural...…”

Section: Beams and Slabs Subjected To Impact Loadsmentioning

confidence: 99%

State-of-the-Art Review on Responses of RC Structures Subjected to Lateral Impact Loads

Zhang

Gholipour

Mousavi

2020

Arch Computat Methods Eng

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Reinforced concrete structures and structural members used in strategic infrastructures such as highway bridges, high-rise buildings, etc. are inherently subjected to lateral impact loads arising from the collision of vehicles, vessels, falling rocks, and rigid objects having different impact geometries, weights, and velocities. Due to the brittle nature of concrete materials, both localized and overall failure modes are very likely to occur in concrete structures under dynamic and impulsive loads. Hence, many attempts have been carried out in the literature to recognize the failure behaviors and to assess the vulnerability of concrete structure under lateral impact loads. This paper presents a comprehensive state-of-the-art review on the responses and failure behaviors of various types of concrete structures and structural members subjected to lateral impact loads based on analytical, numerical, and experimental studies carried out by the previous research works. In addition, the influences of various structural- and load-related parameters on the impact resistance and failure behaviors of different concrete structures under lateral impact loads are reviewed.

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“…*MAT_ADD_EROSION -Note: Applying erosion criteria makes the failed concrete element to be eliminated when the principal strain reached 0.15 [11]. These material models were used to construct the model of RC-beam under impact force in several studies [12,13], which the numerical results were compared and validated with the experimental results of Fujikake's works [3]. The numerical model gave a good agreement on the impact force, mid-span deflection and crack pattern with the experimental results.…”

Section: Finite Element Modelingmentioning

confidence: 99%

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

Tantrapongsaton

Hansapinyo

2019

KEM

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Building collapses from the seismic pounding of two adjacent buildings have been found in many past earthquakes. For the two buildings with different story height, the pounding induces impact load and local stress at column mid-height where the provided column reinforcement is normally lesser than the column’s edge. This paper aims to investigate the impact responses of reinforced concrete columns with different axial load and shear capacity by using numerical simulation method. Sixteen reinforced concretes columns were subjected to an impact load created by dropping 300 kg hammer at the height of 1,200 mm above the mid-span of the column. Every specimen has an identical cross section of 220 mm by 220 mm, with 3,000 mm of clear span length. Both ends of the column were fully restrained. The magnitude of the axial load varies from 0% to 40% of the ultimate axial capacity of the concrete section. Shear reinforcement spacing varies from @200 mm to @60 mm. It is found that the axial loads have a great effect on the impact responses of the RC columns. The specimens with high axial load yield higher peak impact force value and less mid-span deflection. Shear cracks were observed on the specimens with low axial force, but the cracks were relatively decreased when increasing the axial load.

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Flexural Reinforced Concrete Members With Minimum Reinforcement Under Low-Velocity Impact Load

Cited by 10 publications

References 12 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

State-of-the-Art Review on Responses of RC Structures Subjected to Lateral Impact Loads

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

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