CIVIL Created November 20, 2023 01:21 Edited November 23, 2023 09:09

[CIVIL] Why are the Allowable Stress values different for elements with the same construction stage and compressive strength-time history in the hydration heat analysis?

Question

Why are the Allowable Stress values different for elements with the same construction stage and compressive strength-time history in the hydration heat analysis?

If elements created in the same construction stage are applied with the same compressive strength-time history, the results for Allowable Stress should show identical values.

However, the analysis results I have conducted do not seem to follow this trend.

Answer

Hydration heat analysis uses an equivalent age based on temperature and time.

The effectiveness of the modulus of elasticity and allowable stress can be different based on the equivalent age.

Even with the same inputs for time and properties, a temperature difference can lead to variations in equivalent age, affecting the modulus of elasticity and allowable stress.

Higher temperatures increase the equivalent age, accelerating the strength development.

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