Concrete Behavior
You define the concrete elastic modulus in the materials window. You can choose to use code equation 6.1.2 or a specified value.
When you directly specify values, there must be two elastic modulus values:
- Eci = value for initial service (transfer) cross section analyses
- Ec = value for all other conditions
When the AS 3600-2001 code section is selected the following values are used:
where
| = | ||
| = |
For calculations based on the gross section, concrete is assumed to be a perfectly linear-elastic material with no stress or strain limits.
See Concrete Stress-Strain Curves for a description of the stress-strain curves used in a detailed cross section analysis.
The strength stress-strain curves are truncated at a strain of 0.003. The other stress-strain curves have no limit strain.