Analysis

Analysis by computer, includes 15% redistribution at support and <BS EN 1990 A1.2.2

90.7 kNm/rn

90.7 kNm/rn

65.3 kNril/m a) Elastic moments

65.3 kNril/m a) Elastic moments

so so

77.1k

V

1 kWm/m

61,7 fcNrtVm

55.9 kMm/tn

61.7 feNm/m

b) Redistributed envelope

Figure 3.11

Bending moment diagrams

4Z5 kN/m \

. 63.2 kN/m

, 63.5 kN/m \

-t

L J

v.

1 \\ '

\

\

\

42.5 kM/rn

65.5 kN/m

63.2 kN/m \

Redistributed shears, kN / m

At solid/rib interface

Note 1: A ribbed slab need not be treated as discrete elements provided rib spacing < 1500 mm, depth of the rib < 4 x its width, the flange is > 0.1 x distance between ribs and transverse ribs are provided at a clear spacing not exceeding 10 x overall depth of the slab.

Note 2: As 7.5 m < 85% of 9.0 m, coefficients presented in Concise Eurocode 2[10] are not applicable.

BA @1000 mm from B MEd (hogging)

= 47.1 kNm / m = 42.4 kNm / rib = 45.4 kN / m = 40.9 kN / rib

= 43.0 kNm / m = 38.7 kNm / rib = 45.1 kN / m = 40.6 kN / rib

Symmetrical about centreline of BC.

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