By Taylor, Rayner Walter
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Extra info for Composite Reinforced Concrete
This is similar to the calculation given in CP 110 for reinforced concrete when the compression zone is deeper than half the effective depth. For practical beams it will sometimes be necessary to incorporate reinforcing bars within the steel channel in order to enhance the com pressive strength. Such beams will, of course, be balanced or overreinforced and the calculation of the ultimate resistance moment will therefore be based on the forces in compression. Thus Mh. = F h c Z h + c F cc Z e e + ^ r c Zrc where F is the yield force of the compression reinforcement and z is the distance from the centroid of the reinforcement in compression to the centroid of the tension reinforcement.
1. g. the type of column in Fig. 10) would seem to offer a cheaper means of effecting continuity in multi-storey structures. (c) For reinforced concrete plastic design can only be used in con junction with checks on the rotational capacities of sections, by reference to the depth of the compression zones, making for tedious trial and error procedures; in composite reinforced con crete the rotational capacities are likely to be such that no checks are necessary. (This point is discussed in more detail on p .
2 2 Designs A The first set of designs aims at a simple comparison of material quan tities. For this the same slab and the same depth of beam have been I I 6 m slob ^ ^. | . J |f • I beams I j Fig. 13. Floor plan used for comparative designs of beams E e in CM 6 Z _ e * _ E E o o •D E E O o E E O S: 2 E CM 'ft s a | •8 CO •I O I SIMPLY SUPPORTED BEAMS a III o t 3 E o u 8 E O u 26 u u Quantity: kg Total cost: £ . i 1 VO Ol i !
Composite Reinforced Concrete by Taylor, Rayner Walter