Iwant to design rcc isolated colunm 5M long .6 x .5 wide. load cap 22tons can some calc the h&v bars&thickness

Question

i want design for me if possible by fig also i need formula to calculate these ttype of things

Answer 1

Short Axially Loaded Members in Compression

When the minimum eccentricity as per does not exceed 0.05 times the lateral dimension, the members may be designed by the

following equation:

P =0.4 fck .Ac + 0.674 fy Asc

where

P   - axial load on the member, (in ur case 22*1000*9.81*1.5)

fck - characteristic compressive strength of the concrete,

Ac  - Area of concrete,

fy -    characteristic strength of the compression reinforcement, and

Asc - area of longitudinal reinforcement for columns.

You can assume upto 4% of total area as Asc.

ie for example Ac = 0.98 Ag, Asc=0.02 Ag

Substitute Ac  and Asc interms of Ag and find out Ag first.

sustitute backward to find Ac, Asc to suit ur configuration(circular / square/ rect etc).