Steel Brace ductility check failure

This message is created by specifying the element name and floor on which it is located at the beginning of the report.

For example,

SBR001 BASE STORY Steel Brace ductility check failure.

Cross-section conditions of steel structural system braces with high ductility level and normal ductility level are checked in accordance with TBDY Table 9.3. The head width/thickness and body height/thickness ratios of steel elements should not exceed the λ _hd or λ _md limit value given in Table 9.3 .

Ductility control in steel brace design with highly ductile braces is checked in accordance with TBDY 2018, CYTHYE 2016 (GKT & YDKT), AISC 360-16 (ASD & LRFD) or EN 1993-1-1 codes.

• According to AISC 341-16 and AISC 360-16, the effective slenderness ratio KL/r ≤ 200 for highly ductile compression members should be satisfied.

Solutions:

• Brace length can be reduced. If the element length is reduced, the axial compressive strength increases.

• Steel element cross-section can be enlarged.

Symbols

K: effective length factor
L: laterally unbraced length of the member
r: radius of gyration