Ordinary Concentrically Braced Frames (OCBF) per AISC 341-16 §F1

Symbols

E = modulus of elasticity of steel, ksi (MPa)
L_c = effective length of brace = KL, in. (mm)
K = effective length factor
r = governing radius of gyration, in. (mm)

Basis of Design

In accordance with AISC 341-16, Ordinary Concentrically Braced Frames are expected to provide limited inelastic deformation capacity in their members and connections.

Members

Basic Requirements

Braces should provide the requirements of Section D1.1 for moderately ductile members.

Slenderness

Braces in V or inverted-V configurations should provide Eq. F1-1.

Beams

The required strength of beams and their connections are determined with load combinations, including the overstrength seismic load.

Connections

Brace Connections

The required strength of diagonal brace connections is determined with load combinations, including the overstrength seismic load.