Etabs 02 Create Steel Frame Building

8/10/2019 Etabs 02 Create Steel Frame Building

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Create New Model.


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Define Section PropertiesFrame Sections

Import New Properties


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Concrete RectangularSteel I-Beamselect W16x26 to W18x175


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Result: w16x26 to w18x175 will appear as followingOK


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PropertiesFrame SectionAdd New Frame PropertyAuto Selection List


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RENAME Property Name to AUTOLATBMSelect W16x26 to W18x175 add to Auto Select ListOK


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Go to DefineSection PropertiesFrame SectionsImport New PropertiesAuto Select List


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NOTE: by default, the Story4 is labelled as Master Story. Story1,2,3 is similar to Story4.


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1 0 0 0

2 0 0 0

3 0 0 0 90

4 0 0 0 90

Go to cursor modeCtrl + Click on column A2Select Column C7RESULT: notice that the bottom

left shows 4 frames selected.


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Repeat this process for B2, A3, C3 and C4. RESULT: 20 frames selected.


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Choose Frame object Major Direction is Y.Apply. RESULT: Notice the 5 columns (20frames) selected

rotated 90degrees. Reason: We have defined the orientation of the selected to major direction that is Y

direction.


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Assignclear display of assign


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Go to Set Display OptionsAdd a Tick at Extrude FramesTick at Apply to All WindowsApply

OK

CREATE BEAM

Quick Draw BeamsProperty = AUTOLATBM.


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Add Beam as followings:

NOTE: the beam are level due to the similar properties as we have set it that way.


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Use cursor mode, Select Beam C/2-3EditDelete.

CREATE SECONDARY BEAM


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SelectSelectIntersecting Line


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The selected Beam as followsEditDelete.


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DRAW FLOORING OBJECTS

Remove the Extrude Frame View Options.


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Rename property to Deck1

Make sure Snap to Grid Intersections & Points is active

Draw the slab needed. Click enter to finish it.


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This indicate the direction of the deck span.

Use cursor modedefineSection PropertiesDeck Sections.


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Modify/Show PropertyModify the slab depth to 3in.


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DrawAuto Draw Cladding


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Set Elevation ViewPlan A.


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You can right click to show below:


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Select plan view.

DefineLoad Patterns


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MODFIY LOAD: Select Live Load, change type to Reducible Live

Modfiy Load


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ADD LOAD:

1. Rename load name to SDead(super imposed dead load), Choose Type: Super DeadAdd New

load.

2.

Rename load name to Cladding, Choose Type: Super DeadAdd New load.


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3.

Rename load name to Eqy, Choose Type: Seismic, Auto Lateral Load: ASCE: 7-10Add New

Load --> Modify Lateral Load

Uncheck the followingOK

4.

Rename load name to Windx, Choose Type: Wind, Auto Lateral Load: ASCE: 7-10Add New

Load --> Modify Lateral LoadInclude Shell Objects, Wind speed = 100mphOKOK


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Off snap to grid button.

Select (with cursor) all the preliminary beam (boundary). Note that 1 beam = 4frames due to similar

stories design.


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3D-mode:


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Go back to Plan View


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CREATE WIND LOADCreate Wind Load @ Right Elevation

First, create the elevation view of the right side of the building so that the wind load can be apply

to it.


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Turn On Snap to Grid intersections and Points.

Select the following RIGHT elevation, Click on column D1, D2, B2, B3, C3, C4Enter

RESULT:


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Back to Plan View.

MAKE SURE: The wind load direction is on positive x-direction on the right elevation, negative x-

direction on the left elevation.

Click on 3D view, set view optionsObject AssignmentsCHECK local Axes.


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Positive side on right Elevation as above and Negative side on left elevation as below.

Uncheck the local axes and back to basic 3D view


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Select Elevation ViewA OK (note: A view here is the same as leftelevation)

SELECT the whole A panel. (notice the doted line)


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Wind Load Pattern Name: WindxCoefficient, Cp : -0.8 (so that the wind load is at the positive x-

direction acting on the A panel).CHECK Windward (varies).

Choose RIGHT Elevation View:


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AssignClear Display of Sign3D view.

Check Load applied:


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RUN ANALYSIS


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Right Click on the beamto bring out individual diagram.


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NOTE: Display locationShow Max OR Scroll for Values.

E.g Scroll for Values 6.5ft from the joint.


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Reset the display to Underformed shape -> 3D view


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Right Click on the Secondary Beam:


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Check for information of other tabs too:: Beam, Deflection, Vibration, Prices, Factors

FOR 3D view, go to display option, UNCHECK the object fill and all null shells.


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Verify Analysis and Design Section


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Select NO this time? Why?

Right click on 1 of the secondary beam, you will notice that last analysis and current design/next

analysis are not the same.

The accepted Sections List shows all the members that are adequate for the design.


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SelectSelectPropertiesFrame Sections

Select AUTOLATBMSelectClose


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DesignSteel Frame DesignLateral Bracing

Select User SpecifiedSpecify Point Bracing


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On the Plan View tabRight Click on the Beam as follow:

Note the design procedure is Steel Frame Design.

Go to 3D-view tab, DesignSteel Frame DesignStart Design/Check

Click NO::

DesignSteel Frame DesignDisplay Design Info


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Make sure the P-M Ratio is selected (both 3D view and Plan View Tab)

Right Click on the Beam:


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Again: note that the analysis section and design section are different.

here shows the auto generated code suitable steel sections that are adequate for design.

DesignSteel Frame DesignSelect Design Combinations:

Analyzerun Analysis

DesignSteel Frame DesignStart Design/Check

Again, if the analaysis and design still do not match, Click YES to rerun:

DesignSteel Frame DesignVerify Analysis vs Design sections


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Etabs 02 Create Steel Frame Building

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