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| body | --uriencoded--$$ \normalsize M_n = F_%7Bcr%7DS_%7Bx%7D \leq M_p & \qquad \qquad \qquad \qquad \qquad \qquad \qquad \qquad (F2-3) \\ F_%7Bcr%7D = \frac%7BC_b \pi%5e2E%7D%7B\left ( \frac %7BL_b%7D%7Br_%7Bts%7D%7D \right )%5e2%7D \sqrt %7B1+0.078 \frac%7BJ_c%7D%7BS_xh_o%7D \left ( \frac %7BL_b%7D%7Br_%7Bts%7D%7D \right )%5e2%7D & \qquad \qquad \qquad \qquad \qquad \qquad \qquad \qquad (F2-4) \\ L_p= 1.76 r_y \sqrt%7B\frac%7BE%7D%7BF_y%7D%7D & \qquad \qquad \qquad \qquad \qquad \qquad \qquad \qquad (F2-5) \\ L_r= 1.95 r_%7Bts%7D \frac %7BE%7D%7B0.7F_y%7D \sqrt%7B\frac%7BJ_c%7D%7BS_xh_o%7D + \sqrt%7B%7B \left( \frac%7BJ_c%7D%7BS_xho%7D \right)%5e2%7D + 6.76 \left (\frac %7B0.7 F_y%7D%7BE%7D \right )%5e2 %7D%7D & \qquad \qquad \qquad \qquad \qquad \qquad \qquad \qquad (F2-6) $$ |
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Eksenel Basınç
Petek kirişin dolu gövdeli bölümü için eksenel basınç kapasitesi aşağıdaki gibi hesaplanmaktadır.
The nominal compressive strength, Pn, shall be determined based on the limit state of flexural buckling.
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| body | --uriencoded--$$ \normalsize P_n = F_%7Bcr%7DA_%7Bg%7D & \qquad \qquad \qquad \qquad \qquad \qquad \qquad \qquad \qquad \qquad \qquad \qquad \qquad \quad \; \; (E3-1) $$ |
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The critical stress, Fcr, is determined as follows:
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| body | --uriencoded--$$ \normalsize \text %7B(a) When %7D \frac%7BKL%7D%7Br%7D \leq 4.71 \sqrt%7B \frac %7BE%7D%7BF_y%7D%7D \qquad ( \text%7Bor%7D \; \frac%7BF_y%7D%7BF_e%7D \leq 2.25) \\ \qquad \qquad \qquad \qquad F_%7Bcr%7D = \left [ 0.658%5e%7B\frac%7BF_y%7D%7BF_e%7D%7D\right ] F_y & \qquad \qquad \qquad \qquad \qquad \quad \qquad \qquad \qquad \qquad (E3-2) \\ \text %7B(b) When %7D \frac%7BKL%7D%7Br%7D > 4.71 \sqrt%7B \frac %7BE%7D%7BF_y%7D%7D \qquad ( \text%7Bor%7D \; \frac%7BF_y%7D%7BF_e%7D > 2.25) \\ \qquad \qquad \qquad \qquad F_%7Bcr%7D = 0.877F_e & \qquad \qquad \qquad \qquad \qquad \quad \qquad \qquad \qquad \qquad (E3-3) $$ |
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where
Fe = elastic buckling stress determined according to Equation E3-4, as specified in Appendix 7, Section 7.2.3(b), or through an elastic buckling analysis, as applicable, ksi (MPa)
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| body | --uriencoded--$$ \normalsize \qquad \qquad \qquad \qquad F_%7Be%7D = \frac %7B\pi%5e2E%7D%7B \left( \frac%7BKL%7D%7Br%7D \right)%5e2%7D & \qquad \qquad \qquad \qquad \qquad \quad \qquad \qquad \qquad \qquad \qquad \qquad \qquad (E3-4) $$ |
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| body | --uriencoded--$$ \normalsize P_n = F_%7Bcr%7DA_%7Bg%7D & \qquad \qquad \qquad \qquad \qquad \qquad \qquad \qquad \qquad \qquad \qquad \qquad \qquad \quad \; \; (8.1) $$ |
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Burada, kritik burkulma gerilmesi, Fcr, Denk.(8.2) veya Denk.(8.3) ile elde edilecektir.
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| body | --uriencoded--$$ \normalsize \frac%7BL_c%7D%7Bi%7D \leq 4.71 \sqrt%7B \frac %7BE%7D%7BF_y%7D%7D \qquad ( \text%7Bveya%7D \; \frac%7BF_y%7D%7BF_e%7D \leq 2.25) \text%7B için%7D \\ \qquad \qquad \qquad \qquad F_%7Bcr%7D = \left [ 0.658%5e%7B\frac%7BF_y%7D%7BF_e%7D%7D\right ] F_y & \qquad \qquad \qquad \qquad \qquad \quad \qquad \qquad \qquad \qquad \qquad \qquad (8.2) \\ \frac%7BL_c%7D%7Bi%7D > 4.71 \sqrt%7B \frac %7BE%7D%7BF_y%7D%7D \qquad ( \text%7Bveya%7D \; \frac%7BF_y%7D%7BF_e%7D > 2.25) \text%7B için%7D \\ \qquad \qquad \qquad \qquad F_%7Bcr%7D = 0.877F_e & \qquad \qquad \qquad \qquad \qquad \quad \qquad \qquad \qquad \qquad \qquad \qquad (8.3) $$ |
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