How to model concrete in concrete filled steel pipe as a confined concrete in sap2000?

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Please explain how the plastic input value should be considered from the true stress-strain curve for the bilinear elastoplastic material model ?

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What are the limitations and challenges of using machine learning for predicting concrete compressive strength in practical applications?

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In SEM, if a latent variable consists of three observed variables, and each observed variable has four items, what should I do?

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What should be the sample container for the hydrothermal reaction in a microwave reactor at 180 °C for 10 min at the heating rate of 5 °C per minute?

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Raed Ahmad

Please read this link:

https://wiki.csiamerica.com/display/tutorials/Concrete+confinement+for+Caltrans+sections

Grigor Angjeliu

I think that the proposal of Raed should work. make sure you make the changes properly.

Saeid Tabatabaei

Raed Ahmad How we should specify the thickness of steel pipe by Caltrans sections ?