Etabs 03 Model & Analze Building

8/10/2019 Etabs 03 Model & Analze Building

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Model & Analyze Building

INFORMATION:

i.

6 stories

ii.

Each Stories = 12ft

iii.

4 (22ft ) bays x 3 (18ft) bays

iv.

Flat Slabs (with Perimeter Beams)

v.

Lateral Force Resisting System: Interior Shear Walls and Perimeter Moment Frames

1. MODELLING

1.

New Model2.

Model Initialization: Use Built-in-Settings

Display Units : US Customary

Concrete Design Code : ACI 318-11

3.

Note: 4 (22ft ) bays x 3 (18ft) bays

4 baysGrid in X = 5, Spacing = 22ft

3 bays, Grid in Y = 4, Spacing = 18ft

i)


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ii)

iii)

Drop Panel Size: 6ft

Structural System Properties:(1)

ColumnAdd Column PropertyAdd New Property: Rectangular, Concrete

(Rectangular)

Rename Property Name: Concrete Column

Depth: 24in (to make it square)

You can do: Property Modifiers(Maximum = 1)

Steel Reinforcement Properties: Design Type = P2-M2-M3 (Column)

(2)

BeamAdd Beam PropertyAdd New Property: Rectangular, Concrete

Rename Property Name: Concrete Beam

Depth: 30in

Steel Reinforcement Properties: Design Type = M3 Design Only (Beam)

(3)

SlabAdd Slab PropertySelect Slab 1modify/show property

Thickness: 8in

(4)

Drop1: 15in (maybe)

iv)

Load:

v)

Floor Diaphragm Rigidity: Rigid


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4.

5.

Add Floor Openings

i.

Choose Draw Rectangular Floor

Property: Opening

ii.

iii.

Click on C2 and drag to D2, release the mouse to draw the opening

Result:

iv.

Click on Cursor Mode, to release the drawing

v.

Delete Column

Ctrlkey + Left-clickC3:

Select the Column, OK. Result: The column @ C3 are selected over entire height.

Note: 6 frames are selected.

REPEAT: D3, D2 & C2.

Edit Delete

6. Draw Core Walls

i.

DrawDraw Wall Stacks

ii.

use E-shape Layout

iii.

Layout Data:


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a.

Length Dimensions:

LX = 18ft

LY1 = 11ft (to meet size of the floor openings)

LY2 = 11ft (to meet size of the floor openings)

b. Thicknesses:

All = 14in.

iv.

Change the Angle to 900to align the E-Wall to the Floor Opening:

Top Story: Story6

Bottom Story: Story1

v.

Click cursor mode (select button) to leave draw mode

Model Explorer TabLoadsLoad Patterns

Make sure the dead and live load are aready defined.

Right click on load patterns:

i.

Rename Load: Wind, auto lateral load: ASCE 7-10Add new load

modify lateral loadexposure from extents of rigid diaphragm

vi.

Result:


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Set View Options: i. Diaphragm Extentapplyclose

The radial line indicate the extent

Right Click anywhere on the slab: note that the diapragm assigned is D1

Define -> diaphragmsModify/Show DiaphragmRigidcancel

Turn off diaphragm extent display

7.

Define Load Cases

i.

Model ExplorerLoadsLoad CasesWind (right Click) Modify/show Wind

Note: Load Case name: Wind, Use Preset P=Delta Settings: None

ii.

Click on Modify/show.. button ::Automation Method:a.

None

b.

Non-iterativeMass basedfast, approximate

c.

Iterativeload based, slower, accurate (SELECT THIS)

Iterative P-Delta Load Case:

Dead = 1.2 Scale Factor


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Live = 0.5 Scale Factor

2. ANALYZE1.

Run Analysis

2.

Model ExplorerDisplayModel Windows3D viewdisplay (You can select)

E.g.: click on the Frame:

Note: heading mentioned that its dead lad

3.

DisplayForce/Stress DiagramShell Stresses/ForcesComponent: M11Contour

Option: Display on Deformed ShapeOK

Result:

4.

Go to Plan View TABClick on Show Deformed Shape


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Load Case: Wind, OK

Result:

Click:

Click Show Undeformed Shape to RESET:

3. Design Concrete Frame1.

Right Click on a Preliminary BeamNote: Design Tab: Design Procedure = Concrete Frame

Design

2.

DesignConcrete Frame DesignView/Revise Preferences

Design Code = ACI318-11

3.

Click on Concrete Frame Design Button


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Result:

4.

Click on Move Down in Listbuttonto display Story1

Shown here:

5.

Right click on a beam to show the design information form.

Note: this form shows the required reinforcement steel for each design combination at different

location along the beam; the highlighted is the largest value, maybe either top or bottom steel

required.

Click the Envelope Buttonto display the design report.

6.

DesignConcrete Frame DesignVerify All Members Passed

7.

AssignClear Display of Assigns

8.

Go to 3D-View tab to show undeformed shape:

4. Design Shear Wall of the Elevated Core1.

Select Select Object Type WallsSelectClose


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2.

View Shows Selected Objects Only

Result: Only the wall being displayed

3.

Define Pier Labels

Note: 2 Predefined Pier: P1 & P2.

Add New Name: P3 & P4

4.

Activate ALL STORIES

5.

Left click the Wall that lies along Line-C.

Notes: 6shells, 24 Edges Selected

6.

AssignShellPier LabelP1Apply

P2 = Middle btw C-D, P3 = along lineD, P4 = Along line2

Apply all, Close.

7.

The plan view tabSet 3D view:

8.

DesignShear Wall DesignView/Revise Preference

Note: Design code = ACI318-11

9.

DesignShear Wall DesignStart Design/check

Result: when the design is completed, the pier longitudinal reinforcing is displayed.

10.

Right click on a wall, BRINGS UP the Shear Wall Design Report.


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Note: it shows comprehensive design information about the piers.

11.

AssignClear Display of Assign

12.

Change 3-d view back to plan view. (left tab)Story6.

13.

ViewShow All Objects

14.

Model ExplorerTables TabDesignShear Wall DesignShear Wall Pier Summary

Show Table

END.

Etabs 03 Model & Analze Building

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