Experimental Verification of Theoretical Stress-Strain Model for Compressed Concrete Considering Post-Peak Stage

Area of Science:

• Civil Engineering
• Materials Science
• Structural Mechanics

Background:

• A theoretical stress-strain model for composite cement materials was proposed in 2018.
• The model describes concrete behavior using key stress and strain parameters, including elastic and non-elastic stages.
• Analysis of concrete elastic and plastic potentials is crucial for dynamic response and creep analysis.

Purpose of the Study:

• To experimentally verify Iskhakov's 2018 theoretical stress-strain model for compressed composite cement materials.
• To validate the model's accuracy in predicting concrete behavior under compression.
• To assess the model's potential for reducing empirical coefficients in structural design.

Main Methods:

• Experimental testing of compressed composite cement materials.
• Comparison of experimental stress-strain data with the theoretical model predictions.
• Analysis of the descending branch of the stress-strain diagram and elastic/plastic potentials.

Main Results:

• Experimental results show good agreement with the theoretical model's predictions.
• The model's accuracy is confirmed through experimental verification.
• The study demonstrates the model's capability to reduce the number of empirical coefficients.

Conclusions:

• The verified theoretical model accurately describes the stress-strain behavior of compressed composite cement materials.
• Reduced reliance on empirical coefficients simplifies and improves the design of compressed reinforced concrete elements.
• This research contributes to more precise structural analysis and material characterization.