Hinge parameters:
- The slope between points B and C is 3% strain hardening.
- Initial compression slope is the same as the initial tension slope.
- Points C, D, and E based on FEMA 273 (table 5.8, Braces in tension).
- Points C', D', and E' based on FEMA 273 (table 5.8, Braces in compression, Item c).