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)

Energy dissipation for a rigid region 311
c
Fig. 8.5-3
Example 8.5-2
An isotropically reinforced triangular slab is simply supported along two
edges and carries a uniformly distributed load q N!m2 (Fig. 8.5-4(a) ).
Assuming a collapse mode consisting of a single yield line extending from
the vertex to the free edge, determine the collapse load.
SOLUTION
Since the slab is isotropically reinforced, we are entitled (see eqn 8.3-11)
to assume for convenience that the reinforcement arrangements on the two
sides of the yield line are as shown in Fig. 8.5-4(b).
Consider unit deflection at d:
external work = (j)(q)(~ x 8 x 6 sin 70°) = 8q sin 70° Nm
lm /;c
m-j
a
J~~~
a
1--aooomm --j
fa)
b
(b)
Fig. 8.5-4