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Calculations
Yield stress
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Yield stress
public
Yield stress
$$ f_y = 350 \: {MPa} $$
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f_y = 350
Dependant calculations
5
Section slenderness
public
Section slenderness of rectangular hollow section (RHS) as per AS4100:2020 Section 5.2.2.
Section slenderness
$$ \lambda_{e_{AS4100}} = {\left({ {b_{RHS} \over t_{RHS}} }\right) \cdot \sqrt{ {f_y \over 250} }} $$
Design bending moment in RHS
public
Design bending moment in RHS about the major principal axis analyzed by the elastic method as per AS4100:2020 Section 4.4.2.2
$$ M_{x_{AS4100}} = {\phi_{ls_{AS4100}} \cdot M_{b_{AS4100}}} \:, Nm $$
Nominal member moment capacity
public
The nominal member moment capacity as per AS4100:2020 Section 5.6.1.1(1)
Nominal member moment capacity
$$ M_{b_{AS4100}} = {\alpha_{m_{AS4100}} \cdot \alpha_{s_{AS4100}} \cdot M_{s_{AS4100}}} \:, Nm $$
Slenderness reduction factor
public
Slenderness reduction factor as per AS 4100:2020 Section 5.6.1.1
Slenderness reduction factor
$$ \alpha_{s_{AS4100}} = {0.6 \cdot \left({ \sqrt{ \left({ {M_{s_{AS4100}} \over M_{o_{AS4100}}} }\right) ^ 2 + 3 } - \left({ {M_{s_{AS4100}} \over M_{o_{AS4100}}} }\right) }\right)} $$
Section moment capacity
public
Section moment capacity for bending about a principal axis as per AS 4100:2020 Section 5.2.1
Section moment capacity
$$ M_{s_{AS4100}} = {f_y \cdot {Z_{e_{AS4100}} \over 10 ^ 3}} \:, Nm $$