B3B035S Pages: 3

PART ந
Answer any 2 complete questions each having 15 marks

4. (a) Draw the shear force and bending moment diagram for the beam given.

20 N/m 6kN

4 [|] B D
| | |.
2m _ _ 2m 20 ‏جه‎

(0) Derive the relation between intensity of loading, shear force and bending moment. (5)

(10)

5: (a) A simply supported beam AB of 4 m span carries a uniform load of 30 KN/m over the
right hand half of the span. Draw SFD and BMD. (10)
(b) Distinguish between bending moment and moment of resistance (5)

6. (a) A cast iron beam has an I-section with top flange 80 mm x 40 mm, web 120 mm x 20 mm
and bottom flange 160 mm x 40 mm. If tensile stress is not to exceed 30 N/mm? and
compressive stress 90 N/mm”, what is the maximum UDL the beam can carry over ೩ simply
supported span of 6 m if the larger flange is in tension? (10)

(b) Sketch the bending stress as well as shear stress distribution diagram for a beam of

rectangular cross section. (5)
PART C
Answer any 2 complete questions each having 20 marks

7. (a) At a point in a material stress components are px = 500 MPa (tensile), py = 10 MPa

(tensile) and q = 20 MPa. Determine (i) the planes on which shear stress is maximum, (ii)

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