Design of Short Columns Subject to Axial Load and Bending - Design of Reinforced Concrete - page 304

Figure 10.23

e
h

Drawing line of constant 0.64 in Appendix Graph A.8

P n e

R n

c A g h 0.185 f

(4)(15 25)(25)(0.185)
16

P n 434 k

For Bending about y Axis

10

15 0.667

8.00
(15)(25) 0.0213

g

e

h 8 15 0.533

Drawing lines of constant e / h (0.533) in Appendix Graphs A.6 and A.7 and interpolating be-
tween them for 0.667.

P ny e

R n

c A g h

0.163

f

P ny (4)(15 25)(15)(0.163)
8

458 k

Determining Axial Load Capacity of Section

P o (0.85)(4.0)(15 25) (8.00)(60) 1755 k

Using the Bresler Expression to Determine P ni

1

1
P nx P ny 1

1

P ni P o

1

1
434

1
458

1
1755 P ni