ETABS

ETABS 2013/2015 Steps:

Step-01: Define Design Code and units

Step-02: Define Grid & Story Data. Edit all stories data

Step-03: Define Material Properties for Concrete, Rebar, and Masonry etc.

Step-04: Define Section Properties of Beams, Columns, Slab, Stair, Walls, Mat etc.

Step-05: Define Static Loads pattern, Load cases & Load Combination

Step-06: Draw Model

Step-07: Assign Gravity Loads to Floors, Beams, Stairs, Water Tanks Slab, Mat, Ramp

Step-08: Define Diaphragm

Step-09: Assign Support

Step-10: Define Mass Source

Step-11: Messing of Shells and Frames

Step-12: Define and assign Pier & Spandrel level for all walls

Step-13: Define Property Modifiers of Frames (beams and columns) and Stiffness Modifiers of Shells (slab & walls)

A.    Slab:

·       Bending m1 1 Modifier           = 0.25  

·       Bending m2 2 Modifier           = 0.25

·       Bending m1 2 Modifier           = 0.25

·       Others value                            = 1.00

B.    Column:

·       Torsional Constant                  = 1.00

·       Moment of inertia about2       = 0.70

·       Moment of inertia about3        = 0.70

·       Others value                            = 1.00

C.    Beam:

·       Torsional Constant                  = 0.01

·       Moment of inertia about 2       = 0.35

·       Moment of inertia about 3       = 0.35

·       Others value                            = 1.00

D.    Wall:

·       Bending m1 1 Modifier         = 0.35  

·       Bending m2 2 Modifier         = 0.35

·       Bending m3 3 Modifier         = 0.35

·       Others value                          = 1.00

Step-14: Assign Auto Edge Constraints

Step-15: Define Frame-Shell sway properties

Step-16: Check for model

Step-17: Run Analysis of the model

Step-18: Design of the Concrete Frame Sections

Step-19: Design of the Shear Walls

Step-20: Design of Mat

Step-21: Detailing of the Reinforcement

ETABS 2013/2015 Required Information:

(i)             Curved Floor Plan.

(ii)           Beam-Column Layout Plan.

(iii)         Materials Properties:

fc’ = 3000 psi                                            Wc = 140 pcf (for Light)

fy = 60000 psi                                           Wc = 150 pcf (for Stone Cheep)

(iv)         Slab Type = Edge Supported

(v)           Column/Beam = Rect.

(vi)         Foundation Type =

If Soil is Good = Single Footing

If Soil is not Good = Single Footing + Piling

(vii)        No of Story = 15 Story

  No Basement.

(viii)      Building Type = Residential.

(ix)          LL = 50 psf. (Only for High Rise)

FF = 25 psf. (For all floors).

(x)            LL = (100 psf for stair) for Residential

      = (150 psf for stair) for Commercial.

Starting Project Model:

Step-1: Define Code

          Click on this menu respectively:

          File>New Model> Use Built-in Settings with: >Concrete Design Code: ACI 315-11 > OK.

Step-2: Define Grid & Story Slab.

o   Simple Story Data >

          Number of Stories >15

          Typical Story Height > 10’ (Without Ground Floor)

          Bottom Story Height > 12’ (For Ground Floor)

o   Uniform Grid Spacing>

Number of Grid Lines in X direction >6

Number of Grid Lines in Y direction >4

Spacing of Grids in X direction >10

Spacing of Grids in Y direction >20

o   Add Structural Object >

Grid Only > OK.

Note: Change Display Color

o   Options >

Graphics Colors >Display >

1.     Column- Red

2.     Beam – Blue

3.     Springs (Support) – Yellow

4.     Floor – Green

5.     Background – White

6.     Walls – Black

7.     Opening – Ash

8.     Grid Lines – First Color> OK.

Step-3: Define Materials Properties

          A Concrete (fc’)

          Define > Material Properties... > Add New Material Property >

 Material Type > Concrete >

Grade >f’c 3000 psi > OK.

         

Material Property Data >

General Data > Material Name > CON 3.0 > OK.

B Rebar (fy)

Add New Material Property >

 Material Type > Rebar >Standard ASTM A615 >

Grade > Grade 60> OK.

Material Property Data >

General Data >Material Name > Rebar 60.0> OK.

Step-4: Define Section Properties

A Beam (FB)

Define >Section Properties >Frame Sections... >

Filter Properties List>Concrete Rect. >

Click to >

Add New Property >Concrete > Rect. Shape >

          Note: B1 = 12x14

                    B2 = 14x16

                    B3 = 14x18

                    B4 = 16x20

                    B5 = 16x22

                    B6 = 16x24

General Data >Property Name >B1 = 12x14>

Material > CON 3.0 >

Section Dimensions >Depth = 14’ > Width = 12’>

Modify/Show Rebar >M3 Design Only (Beam) >

Rebar Material >Longitudinal Bars >Rebar 60 >

Confinements Bars (Ties) >Rebar 60 >

Cover to Longitudinal Rebar Group Centroid >

Top Bars > 2.5” > Bottom Bars > 2.5” > OK > OK >

B Beam (GB)

Add New Property >

Note: GB1 = 12x12

                    GB2 = 12x16

                    GB3 = 14x16

                    GB4 = 14x16

          Note: Cover to Longitudinal Rebar Group Centroid.

Top Bars = 3”

Bottom Bars = 3”

Note: Top & Bottom Bars will be 3” for Great Beam Only. On the other case is same.

C Column

> Add New Property >Concrete > Rect. Shape >

Note: C1 = 12x16

                    C2 = 14x18

                    C3 = 18x22

                    C4 = 18x20

                    C5 = 20x24

                    C6 = 22x26

                    C7 = 24x28

                    C8 = 24x30

General Data > Property Name > C1 = 12x16 >

Material > CON 3.0 >

Section Dimensions >Depth = 16’ > Width = 12’ >

Modify/Show Rebar > P-M2-M3 Design >

Rebar Material > Longitudinal Bars > Rebar 60 >

Confinements Bars (Ties) > Rebar 60 >OK > OK.

D Slab

Define > Section Properties > Slab Sections... >

Slab Properties > Click To > Add New Property >

Slab Property Data > General Data >

Property Name >S 5.0 >

Slab Material > CON 3.0 >

Modeling type >Shell-Thin >

Note: Shell-Thin – EDGE Support Slab

          Shell-Thick – Flat Plate, Flat Slab and Wall

          Membrane – Curved Slab/Dom

Property Data >

Type > Slab >

Thickness >5” >OK > OK.