고체역학 (Gere) — Shear Forces and Bending Moments: Problem R-4.4

R-4.4 An L-shaped beam is loaded as shown in the figure. The bending moment at the midpoint of span AB is approximately: (A) 6.8 kN·m (B) 10.1 kN·m (C) 12.3 kN·m (D) 15.5 kN·m Given Data from Figure: Horizontal span \( AB = 5.0 \, \text{m} \). Overhang span \( BC = 1.0 \, \text{m} \). Vertical arm at point A: height \( h = 1.0 \, \text{m} \). Horizontal force at the top of the arm at A: \( F_h = 4.5 \, \text{k N} \) (acting to the left). Vertical downward load at point C: \( P = 9 \, \text{kN} \). Support A: Pin support. Support B: Roller support.