Design of the Secondary Beams - Primary Beams - Engineering Assignment Help

Assignment Task:

Task:

I. Design of the secondary beams (15 marks)

Determine a suitable size for the secondary beams, using UB or Welded Beam (WB) sections and Grade 300 steel. Note the following:

•  Apart from their self weight, each secondary beam carries two concentrated loads from the hopper at a distance of ‘E’ from each end. This load is due to the hopper self weight plus its contents. Data necessary for determination of this loading is provided in the tabulation at the end of this document.
•  The secondary beams may be regarded as fully restrained (F) at their ends where they sit on the primary beams. However, since it is conceivable that these beams might buckle simultaneously, with their top flanges moving laterally in the same direction and the hopper moving with them, the load points should not be regarded as restraint points. Hence, these beams each comprise just one segment. In addition, a kl value of 1.4 would be appropriate in this case, in accordance with AS4100 Table 5.6.3(2).

II. Design of the Primary beams (20 marks)

Determine a suitable size for the primary beams, using UB or WB sections and Grade 300 steel. Note the following:

•  A 120mm-thick reinforced concrete slab will be cast on top of the primary beams as depicted. This slab will be ‘locked’ down onto the tops of the beams by the provision of shear connectors which will be welded onto the tops of the beams and cast into the slabs. The shear connectors will restrain any possible lateral buckling of the beam top flange wherever the slabs are located. Allow for a live loading on the slabs of 2 kN/m2

. The slabs will be supported by additional steelwork not shown on the diagram and not relevant to this exercise.

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