Numerical simulation of reinforced concrete structures under impact loading

Živaljić, Nikolina; Nikolić, Željana; Smoljanović, Hrvoje; Munjiza, Ante

doi:10.1002/mawe.201800181

Cited by 5 publications

(3 citation statements)

References 44 publications

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“…Conventional continuum-based methods are not suitable for simulating the damaging process of concrete members. To solve this problem, different numerical approaches can be used like extended finite element method (XFEM) [16][17][18], combined finite-discrete element method [19][20][21], cracking element method [22][23][24][25][26], lattice spring models [27][28][29], and cracking particle methods [30][31][32][33]. With all the analysis of concrete members, there still exist some unignorable numerical problems such as numerical stability, mash bias and high computing efforts when dealing with concrete members reinforced by rebars and fibers when multiple macro and micro-crack will appear during damaging.…”

Section: Introductionmentioning

confidence: 99%

Effect of the Current and Pressure on Weld Strength for IBS Rebar Machine

Zainudin

Jamaludin²,

Yasin³

2022

JMMST

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The increase of population results to the increase of housing in Malaysia. One of the technologies of building houses is using the technique of prefabrication by manufacturing the walls, roof and pillars in factory and assembling the part at the construction site. This research is to study the effect of pressure and time on weld strength of IBS Rebar. In conducting the study, the data for the parameter was collected from the IBS fabrication site in Mahligai Idaman in Kota Bharu, Kelantan. The machine used spot weld to joint the concrete rebar together to make the structure of prefab. The parameter that were taken for this study are current and pressure. The result showed the effect of current and pressure to Ultimate Tensile Stress and Young Modulus. These result suggest that the effect of current and pressure significantly affect the strength of the weldment of the spot weld. On this basis, the parameter of current and pressure need to be account when run the IBS rebar machine.

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Section: Introductionmentioning

confidence: 99%

Effect of the Current and Pressure on Weld Strength for IBS Rebar Machine

Zainudin

Jamaludin²,

Yasin³

2022

JMMST

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“…It was determined that the impact contact surface of the hemispherical unit created a more circular cracking area on the bottom face of the plate compared to the flat unit. Zivaljic, Nikolic and Munjiza [4] conducted a study that compared numerical modeling and experimental data. In the study, plates with 2000x2000x180 mm dimensions were used.…”

Section: Introductionmentioning

confidence: 99%

Determination of energy damping upon impact load in reinforced concrete sandwich plates with different core geometries

et al. 2021

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Under impact loads, it may be challenging to analyze reinforced concrete (RC) sandwich plates with hollow structures in terms of crushing, punching, cracking, and crack trajectories via static and dynamic equations. In the literature, the finite element solutions were conducted after determining the behaviors of the materials according to test results. Therefore, it is required to test the behaviors of RC plates. In this study, the behaviors of sandwich plates under impact loads were analyzed experimentally. The sandwich plates were manufactured by cutting polyester foams (PF) into hexagonal prisms, square prisms, I-type, and S-type, and installing them inside the reinforced concrete plates. The manufactured sandwich plates are 27% lighter than full plates. A weight of 320 kg was dropped freely from 2.5m, and the load was implemented on the center of the plate at a velocity of 7.5 m/s. Similar implementations were also conducted for filled plates, and the maximum displacements were measured in both types of plate tests. By comparing the measurements obtained from each test, the sandwich plate with core geometry that provided the highest absorption, namely, the lowest displacement, was determined. In the analyses, the S-type core geometry demonstrated more absorption compared to other core geometries.

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“…Conventional continuum‐based methods are not suitable for simulating the damaging process of concrete members. For solving this problem, different numerical approaches have been proposed in last decades such as the smeared crack approach, 13,14 gradient damage model, 15,16 higher order gradient theory, 17–22 phase field method, 23–25 extended finite element method (XFEM), 26–28 combined finite‐discrete element method, 29–31 cracking elements method, 32–36 lattice spring models, 37–39 and cracking particle methods 40–43 . Despite their successful applications in analysis of concrete members, there still exist some unignorable numerical problems such as mesh bias, numerical stability, and high computing efforts when dealing with concrete members reinforced by rebars and fibers where multiple macro and micro‐cracks will appear during damaging.…”

Section: Introductionmentioning

confidence: 99%

Peridynamic modeling of prefabricated beams post‐cast with steelfiber reinforced high‐strength concrete

Yuan

Zhang

et al. 2020

Structural Concrete

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For connecting precast concrete members in prefabricated structures, steel fiber reinforced high‐strength concrete (HSFRC) shows greater bearing capacity and better durability than normal reinforced concrete. When these structures are continuously loaded, multiply micro and macro cracks will appear. The modeling of this process is challenging because the conventional finite element modeling commonly encounters numerical problems such as stress locking and overestimations of the damaging zones. On the other hand, the novel peridynamics‐based theory models the continuous and discontinuous processes in the same framework, showing robustness. In this work, based on the recently presented micropolar peridynamics with shear deformability, a numerical tool with implicit iteration scheme for quasi‐static loading condition is built. With the proposed numerical tool, the damage processes of prefabricated beam post‐cast with HSFRC are simulated. The interaction between precast, post‐cast concrete, and rebars are taken into consideration. For validations, the numerically obtained results are compared with the experimental results, indicating that this tool can provide agreeable crack patterns, initial cracking loads, and yield loads of the beams.

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Numerical simulation of reinforced concrete structures under impact loading

Cited by 5 publications

References 44 publications

Effect of the Current and Pressure on Weld Strength for IBS Rebar Machine

Effect of the Current and Pressure on Weld Strength for IBS Rebar Machine

Determination of energy damping upon impact load in reinforced concrete sandwich plates with different core geometries

Peridynamic modeling of prefabricated beams post‐cast with steelfiber reinforced high‐strength concrete

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