(Solved): A beam is subjected to \( M=30 \mathrm{kN} \) m bending moments. The cross sectional dimensions of ...

A beam is subjected to \( M=30 \mathrm{kN} \) m bending moments. The cross sectional dimensions of the beam are shown in the figure. The moment of inertia about the horizontal axis is \( \mathrm{I}=46.41 \times 10^{6} \mathrm{~mm}^{4} \). and distance of centroid from the top of section is \( y_{\text {bar }}=102.2 \mathrm{~mm} .\left[\mathrm{d}=310 \mathrm{~mm}, \mathrm{t}_{\mathrm{t}}=10.4 \mathrm{~mm}, \mathrm{t}_{w}=9.4 \mathrm{~mm}, \mathrm{~b}_{1}=162 \mathrm{~mm}\right] \) Determine the bending stress at point \( \mathrm{H} \). State whether the normal stress at \( \mathrm{H} \) is tension or compression. \( 134.3 \mathrm{MPa} \) 183.2 MPa \( 122.1 \mathrm{MPa} \) 66.9 MPa 248.2 MPa A beam is subjected to \( M=30 \mathrm{kN} \) m bending moments. The cross sectional dimensions of the beam are shown in the figure. The moment of inertia about the horizontal axis is \( \mathrm{I}=46.41 \times 10^{6} \mathrm{~mm}^{4} \). and distance of centroid from the top of section is \( y_{\text {bar }}=102.2 \mathrm{~mm} .\left[\mathrm{d}=310 \mathrm{~mm}, \mathrm{t}_{1}=10.4 \mathrm{~mm}, \mathrm{t}_{w}=9.4 \mathrm{~mm}, \mathrm{~b}_{1}=162 \mathrm{~mm}\right] \) Determine the bending stress at point \( \mathrm{K} \). Use the correct sign for stress whether the normal stress at \( \mathrm{K} \) is tension or compression. Answer: MPa