Steel Buildings in Europe

Title A.4 Worked Example – Simply supported, primary composite beam 4 of 13 4 – 84 0,5h p h p h sc h b 0 b 1 b 2 e Figure A.8 Geometry of the composite beam Concrete class: C 25/30 Value of the compressive strength at 28 days f ck = 25 N/mm 2 Secant modulus of elasticity of concrete E cm = 31 000 N/mm 2 EN 1992-1-1, § 3.1.3 Table 3.1 4.3.2. Actions on the beam at ULS Permanent load: To take into account the troughs of the profiled steel sheeting , the weight of the slab for the secondary beams is taken as:            0,207 0,058 2 25 3,0 0,14 0,106 0,145 = 7,86 kN/m Concentrated loads during the construction stage: F G = (0,354 + 7,86) × 6,0 = 49,28 kN Permanent loads in the final stage: F G = (0,354 + 7,86 + 0,75 × 3,0) × 6,0 = 62,78 kN Self weight of the primary beam: q G = 9,81 × 66,3 × 10 -3 = 0,65 kN/m Variable load (Imposed load): Concentrated loads during the construction stage: F Q = 0,75 × 3,0 × 6,0 = 13,5 kN Concentrated loads in the final stage: F Q = 2,5 × 3,0 × 6,0 = 45,0 kN