Formulas: column bracing

Formula 1

For one intermediate brace, $\beta_{i}=2 P_{r} / L_{b r}$, and for many braces, $\beta_{i}=4 P_{r} / L_{b r}$.

Formula 2

Equation C-A-6-5

For point column bracing, the critical stiffness is a function of the number of intermediate braces (Winter, 1958, 1960). For one intermediate brace, $\beta_{i}=2 P_{r} / L_{b r}$, and for many braces, $\beta_{i}=4 P_{r} / L_{b r}$. The relationship between the critical stiffness and the number of braces, $n$, can be approximated (Yura, 1995) as follows:

Formula 4

Formula 5

This practice constitutes a simple method of designing for partial bracing; that is, bracing that is sufficient to develop the member's required strength but is not sufficient to develop the member's strength based on $L_{c}=L_{b r}$.

Found in

• COLUMN BRACING