고체역학 (Gere) — Stresses in Beams (Advanced Topics): Problem 6.8-3

6.8-3 An IPN 240 steel beam has the cross section shown in the figure. The dimensions are \( b = 106 \text{ mm} \), \( h = 240 \text{ mm} \), \( t_w = 8.7 \text{ mm} \), and \( t_f = 13.1 \text{ mm} \). The loads on the beam produce a shear force \( V = 35 \text{ kN} \) at the cross section under consideration. (a) Use centerline dimensions to calculate the maximum shear stress \( \tau_{\text{max}} \) in the web of the beam. (b) Use the more exact analysis of Section 5.10 in Chapter 5 to calculate the maximum shear stress in the web of the beam and compare it with the stress obtained in part (a).