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Steps of Analyzing a model in ETABS

Creating the model1. Assign number of grid in X &Y diretion. !efine grid & story data.

". !efine frame setion #Beam$ Column$ %B.... Create olumn$ beam$ %B.

'. !efine slab setion as (plate) & ma*e bending stiffness zero. #+or (+lat ,late)

 bending stiffness -ill remain as it is. Create slab area.

. /a*e all the support fi0ed.

. 2epliate the model #edits story data34nsert & edit story.

5. Create -ater tan*.

6. !efine -all setion as (shell). Create shear -all. Assign shear -all at pier le7el.

8. Create stair beam by di7iding lines.

9. /a*e the (!iaphragms) of the model.

Assign: !efine ;oad1. !efine stati load ase. #;.;$ S.!;$ ,.<$ <.;$ E.=>

". /odify lateral load #E.= & <.;

'. Assign ;.; & S.!;. 4n slab$ beam$ stair beam$ lift ore$ -ater tan*.

• ;.; & S.!; #+.+ ? ,.< in slab.

• <.; in beams.#-ithout roof & only in peripheral beam in %.B

• !.; & ;.; in both stair beam. #;oad oming from stair.

• !.; in lift ore beams. #;oad oming from lift.

• !.; in -ater tan* beams$ !.; & ;.; in -ater tan* bottom slab. #;oad oming

from -ater tan*.. Assign mass soure for E=.# All dead loads

. /a*e a ombination -ith all loads.

5. /esh the -hole model by>

• +rame element meshing.

• Slab element meshing.

• A@A;YE TE /!E;

Che* 1. Che* -ith Base shear. #Should be 5D of the total dead load.

". Che* -ith story drift -ith unfatored load ombination.# ombos#1:31:

'. Che* -ith olumn reation. #<ith ombo

. Che* -ith moment diagram of shear -all$ E=$ <.;.

. Earth Fua*e fore in both diretions should be eFual.

5. Summation of -ind reation should be eFual to -ind fore gi7en.

!esign1. Selet design ombo. #9 seleted ombos.

". Start design>'. !esign he*.

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!ata gi7enSlab thi*ness G 5HShear -all thi*ness G 1H

;i7e load G 5 psf #for slab

,artition -all G 8 psf. #for slab

+loor finish G ' psf. #for slab

,artition -all G . *:ft for 1) & ." *:ft for 8.)

Stair load$ !.; G 88 plf$ ;.; G 55 plf. #for one beam

;ift !.; G . *:ft. #;ift load G 1 *ips

<ater tan* !.; G . *:ft for beam$ !.; G ''" psf & ;.; G psf for bottim

slab

Earth =ua*eI

G .1$ S G 1.$ 4 G 1$ 2- G 5

• ;oad ombination for story drift he*I

1. !.; ? ;.; ? S.!; ? ,.< ? E0

". !.; ? ;.; ? S.!; ? ,.< ? Ey

'. !.; ? ;.; ? S.!; ? ,.< ? <0

. !.; ? ;.; ? S.!; ? ,.< ? <y

• Base shear$ J:< G D35D then o*. #< G total dead load

•;oad ombination for !esignI1. !C@ "

". !C@ '

'. !C@

. !C@

. !C@ 5

5. !C@ 11

6. !C@ 1"

8. !C@ 1'

9. !C@ 1

A -all or slab setion an ha7e shell membrane or plate3type beha7ior.

o Shell type beha7ior means that both in3plane membrane stiffness

and out3of3plane plate bending stiffness are pro7ided for the

setion.

o /embrane3type beha7ior means that only in3plane membrane

stiffness is pro7ided for the setion.

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o ,late3type beha7ior means that only out3of3plane plate bending

stiffness is pro7ided for the setion.

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