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Deep beam - Non-linear calculation with equivalent reinforcement of a linear calculation

November , 5th 2023 | Via: Prontubeam | Seen: 797 times
The following image shows a comparison of the calculation of a deep beam between a linear calculation and a non-linear calculation, where the reinforcement considered has been calculated taking into account the linear calculation.

As you can see, the non-linear calculation, when considering the reinforcement obtained from the linear calculation, closely approximates the linear result. Some differences can be observed due to:
- The Youngs modulus in the linear calculation is that of concrete, whereas in the non-linear calculation, it is that of steel, and the section considered is the total in the linear case and the steel section in the non-linear calculation. This leads to a slight reduction in stiffness in the cracked part.
- This change in stiffness results in a variation of the tensioned block, which forces a significant increase in compression forces in a smaller block.
Deep beam - Non-linear calculation with equivalent reinforcement of a linear calculation
This analysis completes the one presented in the article Deep beam – Linear VS Non-linear calculation.

It is also strongly recommended this additonal interesting article: Deep beams – Strut and tie VS Non linear models.
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