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2. Bending Reinforcement

Singly reinforced section:

Doubly reinforced section with d/x 0.37:

For moment redistribution 10% and fy = 460 N/mm2

Min. As = 0.0018bh for bw / b < 0.4

Min. As = 0.0013 bh for bw / b 0.4

Max. As = 0.04bh

KM

bd fcu

2

AM

f zs

y

0 95.

Af bd

f zAs

cu

ys0 156

0 95

2.

.'A

K f bd

f d ds

cu

y

'( . )

. ( ' )

0 156

0 95

2

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3. Shear Reinforcement

Shear Link

Nominal Link

As

b v v

f

sv

v

c

yv

0 95.

A

s

b

f

sv

v yv

0 40 95

.

.

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5. Column Design

- for axially loaded short bracedcolumn supporting a symmetrical

arrangement of floor beams

- for axially loaded short bracedcolumn supporting an approximate

symmetrical arrangement of floor

beams

6.0 (for casting vertically)

N f A f Acu c y sc 0 4 0 8. .

100 0 4Abh

sc .

N f A f Acu c y sc 0 35 0 7. .

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Table 3 Area of Steel Reinforcement per Meter

Steel Reinforcement - Area er one meter mm2/m

Bar Spacing

in mm

Bar

Size

100 125 150 175 200 225 250 275 300 350

8 503 402 335 287 251 223 201 183 168 144

10 785 628 524 449 393 349 314 286 262 224

12 1131 905 754 646 565 503 452 411 377 323

16 2011 1608 1340 1149 1005 894 804 731 670 574

20 3142 2513 2094 1795 1571 1396 1257 1142 1047 898

25 4909 3927 3273 2805 2454 2182 1964 1785 1636 1403

32 8042 6434 5362 4596 4021 3574 3217 2925 2681 2298

40 12566 10053 8378 7181 6283 5585 5027 4570 4189 3590

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Table 4 - Asv/sv Ratio for Shear Link

Asv/sv Ratio for Shear Link (2 legs)

Spacing of Links in (mm)

Link Size (mm) 80 100 125 150 175 200 225 250 275 300 325 350

8 1.257 1.005 0.804 0.670 0.574 0.503 0.447 0.402 0.366 0.335 0.309 0.287

10 1.964 1.571 1.257 1.047 0.898 0.785 0.698 0.628 0.571 0.524 0.483 0.449

12 2.827 2.262 1.810 1.508 1.293 1.131 1.005 0.905 0.823 0.754 0.696 0.646

16 5.027 4.021 3.217 2.681 2.298 2.011 1.787 1.608 1.462 1.340 1.237 1.149