Question

An 8m span propped cantilever beam ABC with an internal hinge at 'B' is shown in figure. A series of concentrated loads as shown crosses the beam from 'A' to 'C', the magnitude of maximum bending moment developed at fixed end 'A' (in kN-m. upto two decimals) is______

• A. 700

Answer 1

The correct option is A 700

Let us first of all release end 'A' and give unit displacement (rotation) so as to draw ILD for BM at 'A:
Now maximum BM at 'A' will occur only if the 80 kN load is placed at hinge location 'B'.

$(B{M}_A{)}_{max}=70\times 2.5+80\times 4+60\times 2.5+55\times 1=700kN-m$