Modelling of 25 storey building with the specified properties using ETABS

Aim

To create the 25 storey building on ETABS with the structural properties

Introduction

To create the 25 storey building by using the ETABS and then assume the heigts as per the IS code

Structural elements details are given by

Beams-300*400 mm

Columns-800*800 mm

Slab-150 mm thickness

Material Properties

Grade of concrete-M30

Grade of steel reinforcement bars-Fe415

Loading

Dead load on beams from infill wall-10kN/m

Live load on floor-3kN/m^2

Procedure

To create the 25 storey building in the ETABS by using the structural properties

Open the ETABS software and then create the model by using

Use build-in-option

Display units - Metric si

Steel section database - Indin

Steel design code - IS 800-2007

Concrete design code - IS 456-2000 by selecting this options in the ETABS and then click ok

New modal quick templates property box is appears on the screen

Custom grid spacing -Edit grit Data and then enter the grid values

By using the table as the reference we have to enter the values in the X Ordinate and also to give the value in the Y Ordinate

After the creation of X and Y Ordinates we have to create the custom storey data

Specify Custo storey data

Story Data box is appears on the screen and then by clicking the add story option we have to create the 25 storey building with the structural property

After the cretion of the 25 storey building we have to assign the loads in the 25 storey building

Define - Material property - Create the new material

Select M30 grade and Fe415 property

After that to create the beam and Coloumn property in the material property

Define -Section property -Frame sections and then create the New frame sections

Add property - Select the Size and then enter the Depth and width value

After the creation of beams and coloumns in the structural building we have to create the slab thickness in the modal

Define - Section property - Slab sections and the enter the slab thickness

After the creation of beam coloumn and slab details we have to create the load details in the building

We have to create the Deal and live load detsils with the IS references

In the creation of the imposed loads in the modify option to create the EQX and then EQY with that we have to change the value Sesimic zone value as 0.16

After the creation of the grid view we have to create the coloumn and beams in the sectional view

For the creation of coloumn click the coloumn in the propery box and then select the coloumn sizes in the property box after that select as concrete coloumn and then assing the coloumn in the grids

If we create in ones side by using the replicate option we can draw the multiple number of coloumns in the structural drawing

I attached the creation of the coloumn view in the ETABS

After the creation of the coloumn we have to create the beams in the structural building for that click the beams in the property box and then create the beams

Select Beam - and then select the sizes of the beam - and then by using the replicate option we have create the beam in the building

After the creation of the beam we have to create the slabs in the structural building for that click the beams in the property box and then create the slabs

Select Slab - and then select the thickness of the slab - and then by using the replicate option we have create the beam in the building

For the slab it is easy to select the particular portion and then we can create the slabs immediately

Fter the creation of beam , coloum,slabs in the building we have to create the diaphragms in the structure

Cick load shell and then diaphragm - D in the property box and then the diaphragms is formrd in the structure

CRITERIA		DESIRABLE SOLUTION	EXERCISE RESULT
Fundamental Translational Natural Period	X - Direction	4.4 Sec	4.41
Torrisional irregularity	Y - Direction	4.2 Sec	4.211
Torrisional irregularity	IS 1893 -2016 (part -1) Table - 5	Torsional mode time period should be < X and Y direction time periods	Yes
Vertical irregularty	IS 1893 -2016 (part -1) Table - 6 Clause - 7	First three modes together should contribute at least 65% in mass participation factor in each principal direction	Yes
		Fundamental lateral natural periods plane direction are away from each other by atleast 10%	No
Inter -Storey Drift	IS 1893 -2016 (part -1) Table - 6 Clause - 7.11 1.1	Storey drift shall not exceed 0.004 times the storey height for base shear with no load factors (4 *10^-3)	Yes