Numerical Analysis on Fatigue Behavior of Plain Concrete and Alkali-activated Concrete

Alkali-activated concrete (AAC) has recently gained a lot of potential to become one of the most recommended sustainable replacements for Ordinary Portland cement concrete (OPCC). In the present investigation, an attempt has been made to study the static and fatigue flexural behavior of AAC compared...

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Bibliographic Details
Published in:IOP conference series. Earth and environmental science 2024-08, Vol.1387 (1), p.12016
Main Authors: Sushanthkumar, K V, Channappa, T M, Prashanth, M H, Chaitra, A R
Format: Article
Language:English
Subjects:
ABAQUS
Alkali resistance tests
Alkali-activated concrete
Bending fatigue
Cement
Concrete
Concrete damage plasticity (CDP) model
Cyclic loads
Fatigue failure
Fatigue tests
Load resistance
Load-CMOD curve
Load-deflection curve
Materials fatigue
Numerical analysis
Numerical models
Plane stress
Portland cement
Portland cements
Stress-strain curves
Two dimensional analysis
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Summary:Alkali-activated concrete (AAC) has recently gained a lot of potential to become one of the most recommended sustainable replacements for Ordinary Portland cement concrete (OPCC). In the present investigation, an attempt has been made to study the static and fatigue flexural behavior of AAC compared to that of OPCC by using numerical modeling FEA software, ABAQUS. The nonlinear behavior of the stress-strain curve of the concrete has been studied using the concrete damage plasticity (CDP) model. A 2D notched beam was modelled using plane stress condition and three-point bending tests were performed under monotonic loading to obtain the static behavior of concrete. The result obtained has been utilized to fix the loading range for cyclic loads in fatigue analysis and at different loading frequencies. The load-CMOD curves and load-deflection curves were obtained for both static and fatigue loading, and the number of cycles to failure during fatigue. From the results, it has been observed that the Ordinary Portland cement concrete specimens sustain more load than that of Alkali-activated concrete under monotonic loading. However, AAC has shown more resistance to fatigue than that of the OPCC and the frequency of loading significantly influences the fatigue performance.
ISSN:1755-1307
1755-1315
DOI:10.1088/1755-1315/1387/1/012016