*subject: civil engineering - Reinforced prestressed concrete*please refer attached picture formulaA square tied column to support an axial dead loadof 529 kN and axial live load of 663 kN. fc'=25.72MPa, fy = 332 MPa, gross P= 0.028. The no. of 23mmbars to be used is ___pieces.round off zero decimal places Please refer thisFormulaDesign of axially Loaded Tied ColumnsGiven :axial load, fc', fyRequired: Column size, size of main bars, size and spacingof lateral tiesGeneral Procedure1.Solve for design axial load Pu2.Assume pg0.01 to 0.083. Solve for required gross area to get column sizeAg=P₁₁(0.65 )0.8 0.85 fc' (1- pg) + Pgfy.4. Solve for AstAst = PAg5. Using adjusted values of column size and Astr checkcolumn capacity (optional)P₁ = 0.80{0.85fc'(Ag-Ast) + Astfy}6. Assume size ot ties and solve for the spacingUse the smallest value from the ff:a) 16 times longitudinal bar diameterb) 48 times tie diameterc) least dimension of the column

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Answered: *subject: civil engineering -…

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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*subject: civil engineering - Reinforced prestressed concrete

*please refer attached picture formula

A square tied column to support an axial dead load
of 529 kN and axial live load of 663 kN. fc'=25.72
MPa, fy = 332 MPa, gross P= 0.028. The no. of 23mm
bars to be used is ___pieces.

round off zero decimal places

Please refer this
Formula
Design of axially Loaded Tied Columns
Given :axial load, fc', fy
Required: Column size, size of main bars, size and spacing
of lateral ties
General Procedure
1.Solve for design axial load Pu
2.Assume pg
0.01 to 0.08
3. Solve for required gross area to get column size
Ag
=
P₁₁
(0.65 )0.8 0.85 fc' (1- pg) + Pgfy.
4. Solve for Ast
Ast = PAg
5. Using adjusted values of column size and Astr check
column capacity (optional)
P₁ = 0.80{0.85fc'(Ag-Ast) + Astfy}
6. Assume size ot ties and solve for the spacing
Use the smallest value from the ff:
a) 16 times longitudinal bar diameter
b) 48 times tie diameter
c) least dimension of the column

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