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)

Design load F = 1.4gk + 1.6qk
Step 3 Ultimate moments
Design and detailing-illustrative examples 433
= 48.7 + 26.4 = 75.1 kN/m
gk = 34.8 kN/m; qk = 16.5 kN/m; F = 75.1 kN/m
BS 8110: Clause 3.2.1.2.4 allows continuous beams in a framed structure
to be analysed by assuming that the columns provide vertical restraint but
no rotational restraint. (See Comments on Step 3 at the end of the
solution.) Figure 11.5-5 shows the free bending moments and the
bending moments at support B for the three loading cases. (See Step 5
for the design bending moments at the end supports A and C.)
Figure 11.5-6 shows the bending moment envelope; for a length of the
CASE I
D.F.
A c
F.E.M. -507 +507 -142 +142
Distr. +507---- -142
c.o. +254 -71/
Distr. -241 -306
Support 8. M. 0 +520 -519 0
Free 8-M. 760 213
CASE 2
o.F.
A c
F.E.M. -23'S +235 -307 +307
Distr. +~35--.... -307
c.o. +117 -154 ...............
Distr. +48 +61
Support 8.M. 0 +400 -400 0
Free 8-M. 352 460
CASE 3 B
A c
D. F.
Fig.ll.S-5
F.E.M. -507 +507 -307 +307
Distr. +507 -307
c.o. +254 -154
Distr. -132 -168
Support 81\A. 0 +629 -629 0
Free S.M. 760 460