Slenderness verification
The engineering practice it is known that very thin elements may cause problems. Limit values aren't specified in the standard, but it is convenient to keep the slenderness ratio within certain limits very often. Therefore, the program always calculates and reports the value of the slenderness ratio for any member. This value can be also compared with the specified limit.
The slenderness ratios in the directions of y and z axis are calculated using following formulas:
where is: | lcr,y, lcr,z |
|
iy, iz |
|
Buckling lengths lcr,y and lcr,z are determined using these rules:
- members in compression - buckling length for corresponding direction is used.
- members in tension - "Sector length for buckling" is used. If not specified, basic member length will be used.
The greater value of λy and λz will be used for slenderness verification.