Challenge

Modelling of 25 storey building with the specified properties using ETABS

Answer-

Aim- Modelling of 25 storey structure frame as per given data as per question-

Procedure-

First go to ETABS Software open and choose new model then use built in setting with display unit and design code.

Go to custom grid setting and edit grid and set X,Y Grid and go to grid storey with edit storey and add storey, set storey height and choose master storey and set similar storey.
Go to define option and select material option and add new property of material of concrete and rebar.
Go to define then selection properties then frame section and add beam & coiumn size and properties.
Go to define then selection properties then slab section and add slab properties.
Define - Load pattern -Add Load
Define-mass source data- select specified load patern
check load case then Load combination
choose column and select column properties and draw column again same process for beam and slab .

Carry out the following exercise as per question-

Criteria	Properties	Given solution	Result	Remarks
Translational fundamantal natural period of vibration	X-Direction	4.4 s	4.55 s
	Y-Direction	4.2 s	4.35 s
Torsional irregularity	IS1893-2016 Table 5	Torsional mode time period must be lesser than X & Y Direction Natural time period	3.36 so it is less
Vertical Irregularity	IS1893-2016 Table 6	In seismic zones 2nd & 3rd it shall be ensured that the first three modes together contribute at least 65% mass participation	Yes it is 80%
Storey Drift	Clause 7.11.1.1	Storey Drift in any storey shall not exceed 0.004 times the storey height , under the action of design base of shear Vb with no load factors .	Yes

Ship work like this
in your own course.