F. K. Kong MA, MSc, PhD, CEng, FICE, FIStructE, R. H. Evans CBE, DSc, D ès Sc, DTech, PhD, CEng, FICE, FIMechE, FIStructE (auth.)-Reinforced and Prestressed Concrete-Springer US (1987)

Hillerborg's strip method 323
respectively. Within each strip the reinforcement would be uniformly
arranged.
Wood and Armer have pointed out that the discontinuity pattern in
Fig. 8.6-3(a) need not have been chosen, and have suggested the alternative
pattern in Fig. 8.6-3(b) in which the points d, e, d' and e' lie on the
45° diagonals. The alternative pattern avoids the troubles arising from
oddly shaped loaded portions on the strips and the consequent averaging of
moments.
Example 8.6-1
Figure 8.6-4(a) shows a simply supported rectangular slab abed. If the
design load for the ultimate limit state is 20 kN/m 2 determine:
Strong bands
round opening
~~~~~~~~~~~~~~~~~
Opening
(a)
!
L
0
a.
g.
Ill
>o
a.
-~
II)
Fig. 8.6-S
Free edge
(b)