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)

244 Shear, bond and torsion
A sv 060 -= . mm
Sv
Sv(max) = 0.75d = (0.75) (320) = 240 mm
Provide RlO at 200 (see Fig. 4.11-2)
From Table 6.4-2,
A sv
- (provided) = 0.79 > 0.60 OK
Sv
6.13 Computer programs
(In collaboration with Dr H. H. A. Wong, University of Newcastle upon
Tyne)
The FORTRAN programs for this chapter are listed in Section 12.6. See
also Section 12.1 for 'Notes on the computer programs'.
Problems
6.1 An acceptable rational theory for shear is not yet available, and the
design methods used in practice are based on experience, laboratory tests
and engineering judgement.
Practising engineers in the UK generally adopt the design procedure
explained in Clause 3.4.5 of BS 8110. Comment critically on every major
step of the Code's procedure; support your arguments with research results
wherever possible.
Ans.
See Sections 6.2 and 6.3. Study again the comments in Section 6.4 if
necessary.
6.2 Clause 2.4 of BS 8110: Part 2 explains the procedure for designing
structural members for torsion. Comment critically on every major step of
the Code's procedure; support your arguments with research results
wherever possible.
Ans. See Sections 6.7 to 6.10. Study again the comments in Section 6.11
if necessary.
6.3 In current design practice, the following equation is used to calculate
the amount of shear reinforcement:
A sv
Sv
bv(v - ve)
0.87fyv
= --'-::'--::-:=-::-""':':"
Using the truss analogy, derive the equation from first principles; relate
your assumptions to research results.
6.4 In current design practice, the following equation is used for
calculating the torsional shear stress VI: