projek perisiaperisiann

8/12/2019 projek perisiaperisiann

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Design Calculation (Column)

Step 1 : Classify whether the column is short or slender

1) Column

1- b x h

2- Lz = column heightbeam depth

3- Lx = columnbeam depth

2) Beam

Main beam = b x d

Secondary beam = b x d

Moment of Inertia, I

I = bd / 12

Stiffness, K

K = Moment of Inertia, I / L

Relative Column Stiffness, k

k = Stiffness, K (column) / 2 (Stiffness, K (beam))

Effective Length Of Column, Lo

For braced column, Lo = 0.5l For unbraced column, Lo = max ( ( ), )

Radius Of Gyration, i

i =

Slenderness Ratio,

=


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Slenderness Limit, limit

limit =

A = 0.7B = 1.1

C = 1.7rm

*rm =, *Mo1, Mo2 = first moment order at the end of the column with Mo1 > Mo2

n =

*NED = design ultimate load, *Ac = Area of Column, * fcd =

If zz, yy < limit , the column is short for both axes

If zz, yy > limit , the column is long for both axes

Step 2 : Design The Column

Short Braced Column

Procedure :

1) Determine N, Mz & My

2) Check [ez/h] / [ey/b] > 0.2 or [ez/b] / [ey/h] > 0.2

3) Check whether Mz/h > My/b or otherwise

If Mx/h > My/b , use equation Mx = Mx + My

If Mx/h < My/b , use equation My = My + Mx

Width of column, b = width at right angle to the axis moment considered


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Design Data (Column)

Size = 300mm x 300mm

Characteristic strength of concrete, fcu = 30 MPa

Characteristic strength of reinforcement, fyk = 460 MPa

Concrete density = 25

Steel unit weight = 78.6

Column number :

1) Stump = 17

2) Floor ground beam to first beam = 17

3) Floor first beam to roof beam = 15


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Conclusion

In this project, we get much knowledge by using Esteem and AutoCAD software. As a

future civil engineer, we must know about how to use both software because when are

work especially at a consulting firm, both software are always be used. Based on this

project, we are able to analyze the architecture plan such as how to sketch a grid, beam,

column, and other structural element by using Esteem software.

Then by using esteem software, we can get the size of each element and their

strength of material automatically. Furthermore, by learn how to use AutoCAD software, we

can transfer the structural plan from Esteem to AutoCAD. In addition, we can do the design

calculation to find the reinforcement area of each structural element by comparing the

result that we get from Esteem software with manual calculation.

By using Esteem software, we also have learnt and identify about how to overcome

the problems when doing the analysis until we get the final result of the analysis without

errors occur. We also have learn about the flow of load distribution in structure elements

starting from slab to beam, then to column and lastly to foundation. So the right flow of

load distribution influence the lifespan of a building.

Lastly with doing this project, we can create a high cooperation between each other

in the group. Then, the segregation of works are important to make sure that our project

can running smoothly and we can submit our project work before the due date.

projek perisiaperisiann

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