軸力 \(N = \) \(\text{N}\)
風力による等分布荷重 \(w\) および曲げモーメント \(M\) の算定:
\(w = q \times \frac{B}{1000} \times C_f\)
\(w = \) \(\times \frac{\text{}}{1000} \times\) \(= \) \(\text{N/m}\)
\(M = \frac{w \cdot l_k^2}{8} \)
\(M = \) \(\text{N}\cdot\text{mm}\)
\(\lambda = \frac{l_k}{i} = \frac{l_k}{h / \sqrt{12}}\)
\(\lambda = \)
$$ F_k = \begin{cases} \lambda \leqq 30 \text{ の場合} & : F_c \\ 30 < \lambda \leqq 100 \text{ の場合} & : (1.3 - 0.01\lambda) F_c \\ \lambda > 100 \text{ の場合} & : \frac{3000}{\lambda^2} F_c \end{cases} \dots (2.5.3.3) $$
\(\lambda\) の条件より、
\(F_k = \) \(\text{N/mm}^2\)
$$ f_k = \left\{ \dots, \text{短期}: \frac{2}{3} F_k \right\} \dots (2.5.3.2) $$
\({}_s f_k = \frac{2}{3} \times F_k = \) \(\text{N/mm}^2\)
\({}_s f_b = \frac{2}{3} F_b = \) \(\text{N/mm}^2\)
$$ \frac{N}{A \cdot {}_s f_k} + \frac{M}{Z \cdot {}_s f_b} \leqq 1.0 \dots\dots\dots (2.5.3.4) $$
圧縮応力比: \(\frac{N}{A \cdot {}_s f_k} = \)
曲げ応力比: \(\frac{M}{Z \cdot {}_s f_b} = \)
検定比: \(\leqq 1.0\)