Structural Modelling using Etabs 2018

Open new model , custom story data then edit story .

edit also grid data as in x, y direction from custom grid spacing.

Go to define, material properties assign material M30 grade.

Go to define, material properties assign steel grade fe415, fe 500

Go to define , section properties , frame properties assign column sizes 450x600 and beam sizes 400x500

Go to define , section properties, slab section assign to it

Go to define , section properties, wall section assign W300. ( brick wall consideration)

Go to define , pier lables as per framing planes there are 14 number of shear walls assigned.

Go to define , load patterns

Assign live loads as per IS875 part-2 , EQx, EQy seismic loads as per IS 1893-2016

Go to define, mass source assign values for live load as 0.25 as per Is 1893-2016

Go to define , modal case for seismic modal case maximum number of modes are taken as 20.

Go to define , functions, response spectrum , add new function

Go to define , load combinations, add default design combos use concrete frame design and concrete shear wall design.

Using draw column/beam panel command assign columns and beams to plan , wall command assign shear wall as required

Live loads are taken as IS 875 part-2 for terrace level is assumed to be 0.5 sq.m

Floor finishes are 75mm is given , so density of cement motar is 20kN/cu.m x0.075m =1.5 KN/m2 is assigned to all floors

AAC bricks material is provided , density of AAC block is 6.5KN/cu.m x 0.2 m thickness x 2.55m height = 3.3KN/m live load is assigned to all rc beams

Above terrace level there is mumty level where water tank loads , lift core area loads are assigned

All joints are taken as pined supports

Go to design ,live load reduction factor , live loads are assigned as per IS 875 part -2

Go to run analysis , and run it

Go to display , tables , analysis results , structural output , modal information , modal mass participation ratios

Fundamental mode is viewed and first 2 fundamental modes are greater than torsional mode

Go to display , tables , analysis results , structural output, base reaction

Based on the scale factor by dividing EQx/RSx , EQY/RSy for response spectrum analysis for modal analysis and EQx,EQy are removed from load patterns after analysis

Go to display , storey response plot, inter storey drifts (RSx, Rsy)

Go to display , force / stress diagram , frame/pier/ spandrel forces