Microplane Model for Steel and Application on Static and Dynamic Fracture

Ožbolt, Joško; Tonković, Zdenko; Lacković, Luka

doi:10.1061/(asce)em.1943-7889.0000993

Cited by 5 publications

(2 citation statements)

References 26 publications

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“…For concrete and similar quasi-brittle materials, microcrack growth and viscosity play significant roles at lower to medium loading rates, while inertia becomes predominant at higher rates, such as during impact events. At a certain threshold loading rate, inertia leads to a progressive increase in resistance and a shift in failure modes, such as from bending to shear failure [28,107,108].…”

Section: Evaluation Of the Initial And Residual Bearing Capacities Of...mentioning

confidence: 99%

State-of-the-art on Impact and Explosion behaviour of concrete structures –Rilem Committee TC 288 Impact and Explosion

Prisco,

Cadoni,

Caldentey

et al. 2024

Preprint

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Extreme loads can arise from accidents such as vehicle collisions or airplane crashes, as well as deliberate acts of terrorism or military attacks involving blasts and fragmentation. Blast overpressure can also occur accidentally, for example, from explosions of hazardous materials such as gas. Distinguishing between accidental and deliberate loads is crucial for designing appropriate protection measures. The repercussions of extreme loading events can be devastating, leading to injuries, loss of life, economic setbacks, and significant social disruption. These consequences result not only from the direct effects of impacts or explosions but also from secondary factors such as structural collapse, which is particularly concerning due to its potential for widespread devastation and substantial losses. Efforts to enhance the protection of concrete structures have focused on understanding the properties of construction materials and how structures respond to impact and blast loads. This document presents a comprehensive overview of RILEM TC 288 “Impact and Explosion,” aiming to provide essential guidance for designing concrete structures to withstand extreme dynamic loads. This emphasizes the importance of a thorough understanding and accurate modelling of loading scenarios and material behaviour. By implementing the strategies outlined in this document, engineers can enhance the safety and resilience of structures facing such challenges.

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Section: Evaluation Of the Initial And Residual Bearing Capacities Of...mentioning

confidence: 99%

State-of-the-art on Impact and Explosion behaviour of concrete structures –Rilem Committee TC 288 Impact and Explosion

Prisco,

Cadoni,

Caldentey

et al. 2024

Preprint

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“…Steel is almost rate insensitive, however, if it is loaded under high loading rates; after threshold strain rate the resistance (apparent strength) starts to increase progressively. The reason is that the non-linear response of steel (strain hardening) that generates strong inertia induced resistance [ 39 ]. This effect, as well as other inertia contributions, is automatically accounted for in dynamic finite element analysis.…”

Section: Constitutive Law and Finite Element Analysismentioning

confidence: 99%

Impact Analysis of Thermally Pre-Damaged Reinforced Concrete Frames

2020

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In the present study, the influence of thermally induced damage of reinforced concrete (RC) frames on their static and dynamic response is experimentally and numerically investigated. In the experimental test, the RC frame is first pre-damaged through fire exposure and then loaded from the side with the impact of a steel pendulum. To verify the recently developed coupled thermo-mechanical model for concrete, transient 3D FE simulation is carried out. The rate and temperature-dependent microplane model is used as a constitutive law for concrete. It is first shown that the simulation is able to realistically replicate the experimental test. Subsequently, the numerical parametric study is performed where the dynamic and static response of RC frame is simulated for both hot and cold states. It is shown that the pre-damage of RC frame through fire exposure significantly reduces the resistance and changes the response. Finally, it is demonstrated that for the impact load the rate sensitive constitutive law of concrete significantly contributes to the response of RC frame.

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