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By reference to Figure 3.1, it will be seen that the value of cote may be taken anywhere between the limits of 0.67 to 1.5.

To minimize link reinforcement, take cote = 1.5

Design shear resistance, VRd3, for shear reinforcement is given by

zf note ywd

Re-arranging gives s zf cot©

Putting VRd3 equal to

sw Sd s zf Hcote ywd

Using high yield reinforcement f ^ = ^wk = 460 = 400 N/mm2 7, 1-15

Therefore

355 x 103

-JtLntl = 0.46 x — = 0.74 < = 0.55 x— = 5.5 N/mm2. . OK Fan 427 b s 250 2 2 M

Before choosing the reinforcement, the effects of torsion will be considered and the results combined.

The force in the longitudinal reinforcement, T , ignoring flexure, is given by

Eqn 4.30

For vertical links, cota = 0 355

Additional area of longitudinal reinforcement T6 266.3 x 103

f h 400

This area of reinforcement must be combined with the tension reinforcement required for flexure together with the longitudinal reinforcement required for torsion.

0 0

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