Rcc structure design by etabs (acecoms)

Seismic Analysis &
Design of
10 Story RC Building
(Equivalent Lateral Force)
Using ETABS
(Metric Units)
ACECOMS, AIT

Table of Content
Objective 5
Problem 5
Step by Step 12
1. Start Model with Template 12
2. Define Material Properties 17
3. Define and Assign Section Properties 19
4. Draw Shear Wall and Define Pier Labels 32
5. Define “Similar Stories” Option 37
6. Modify Floor Plan at “STORY8” to “STORY10” 38
7. Modify Floor Plan at “BASE” to “STORY7” 43
8. Assign Auto Mesh Options at Shell Panels 46
9. Assign Supports 48
10. Assign “DEAD” and “LIVE” Load 49
11. Define and Assign Wind Load Case 54
12. Define Static Load Case for Equivalent Seismic Force 62
13. Run Analysis and View Results 68
14. Run Concrete Frame Design and View Results 81
15. Run Shear Wall Design and View Results 87

ETABS Tutorial Example ACECOMS, AIT
Seismic Analysis & Design of 10 Story RC Building (Equivalent Lateral Force) 5/97
Objective
To demonstrate and practice step-by-step on the
modeling, analysis and design of 10 story RC building
for seismic equivalent lateral force.
Problem
Carry out analysis, and design of 10 story RC building
as shown in following details using IBC2000
equivalent lateral force.
3D View

6/97 Seismic Analysis & Design of 10 Story RC Building (Equivalent Lateral Force)
Plan View (Unit in m)
BASE – STORY 7
STORY 8 – STORY 10
6.00m6.00m6.00m
2.00 2.00 2.00
2.002.002.00
6.00 m 6.00 m 6.00 m
6.00m6.00m6.00m
2.00 2.00 2.00
2.002.002.00
6.00 m 6.00 m 6.00 m

Elevation View
Material Properties for Concrete (Unit in kg and cm)

Section Properties
Member Dimension
Beam (width x Height) 30 x 60 cm
Column 50 x 50 cm
Slab Thickness = 15 cm
Shear wall Thickness = 20 cm
Story Height Data
Story Height
Typical Story 3.00 m
Story at base of building 4.00 m
Static Load Cases
Load
Name
Load Type Details Value
Self Weight of Structural Members
Calculate automatically using Self
Weight Multiplier in ETABS
-
Uniform Load on Slabs:
(Finishing + Partition Load) 0.20 t/m2
DEAD Dead Load
Uniform Load on Beams:
(Wall Load) 0.50 t/m
LIVE
Reducible
Live Load
Uniform Load on Slabs:
(Use Tributary Area: UBC97)
0.25 t/m2

Wind Load Cases (UBC97)
Load Case
Parameter
WINDX WINDY
Wind Direction X Y
Wind Speed 90 mph
Exposure Type B (Suburban area)
Importance Factor 1 (Building normal importance)
Equivalent Static Force Parameters (IBC2000)
Parameter Values Remark
Time Period (T) 1.47
Equation 16-39
(Ct = 0.020)
Response Modification
Factor (R)
5.5
Table 1617.6
(Dual System: Ordinary RC
Shear Wall)
Seismic Group I Section 1616.2
Site Class E
Table 1615.1.1
(Soft Clay)
Response Acceleration
at Short Period (Ss)
0.45
Response Acceleration
at 1 Second (S1)
0.18

Equivalent Static Force Case
Load Case Name
Direction and
Eccentricity
% Eccentricity
EQXA X Dir + Eccen. Y 0.05
EQXB X Dir - Eccen. Y 0.05
EQYA Y Dir + Eccen. X 0.05
EQYB Y Dir - Eccen. X 0.05

Step by Step
1. Start Model with Template
Step 1-1: Select Working Unit and Start New Model using Template
Start up screen of ETABS, select working unit to be “ton-m” at drop-down menu on
the bottom-right of screen and click on New Model button to start new model
using template

Note:Click the Default.edb button. This means that the definitions and
preferences will be initialized (get their initial values) from the Default.edb
file that is in the same directory as your ETABS.exe file. If the Default.edb
file does not exist in this directory then the definitions and preferences are
initialized using ETABS built-in defaults.
You should create your Default.edb file such that you most commonly click
this button.
In some cases you may want to click the Choose.edb button and specify a
different file from which the definitions and preferences are to be initialized.
For example, a certain client or project may require certain things in your
model to be done in a certain way that is different from your typical office
standards. You could have a specific .edb file set up for this client or project
which could then be used to initialize all models for the client or project. This
will allow setting of the repeatedly used preferences.
Click the No button if you just want to use the built-in ETABS defaults.

Step 1-2: Specify Grid and Story Dimension
Specify grid dimension and story dimension as shown in figure below. Select “Two
Way or Ribbed Slab” from “Structural Objects” list.

Step 1-3: Enter Two Way Slab System Parameters
Specify parameters as shown in figure below.

Step 1-4: Create Two Way Slab System Model
Two way slab model has been created as parameters specified from previous
steps.

2. Define Material Properties
Step 2-1: Change Working Unit
Change working unit to “kg-cm” and go to Define >> Material
Note: You may select “N-mm” or “Kip-in” or whatever unit to input material
properties.

Step 2-2: Check Material Properties
Select “CONC”, click on “Modify/Show Material..” button and specify material
properties as shown in the figure below.

3. Define and Assign Section Properties
Step 3-1: Define New Frame Section and Specify Section Properties for Beam
Go to Define >> Frame Sections and select on “Add Rectangular” from second
drop-down menu. Enter beam section properties as shown in figure below.

Step 3-2: Enter Property Modifiers
Click on “Set Modifiers” and enter property modifiers as shown in figure below
Note: Property modification factors are used to reduce moment and
torsion stiffness due to crack section.

Step 3-3: Specify Reinforcement Data for Beam
Click on “Reinforcement” and specify reinforcement data as shown in the following
figure.
Note for Reinforcing Information for Beam
For concrete beams there are two types of reinforcing information that you specify.
Rebar cover is specified at the top and bottom of the beam. The top cover is
measured from the top of the beam to the centroid of the top longitudinal reinforcing.
The bottom cover is measured from the bottom of the beam to the centroid of the
bottom longitudinal reinforcing.

The reinforcement overrides are specified areas of longitudinal reinforcing steel
that occur at the top and bottom of the left and right ends of the beam. These
overrides are used by ETABS as follows:
In the Concrete Frame Design postprocessor when the design shear
in a concrete beam is to be based on provided longitudinal
reinforcement (that is, the shear design is based on the moment
capacity of the beam) ETABS compares the calculated required
reinforcement with that specified in the reinforcement overrides and
uses the larger value to determine the moment capacity on which the
shear design is based.
In the Concrete Frame Design postprocessor when the minimum
reinforcing in the middle of a beam is to be based on some
percentage of the reinforcing at the ends of the beam ETABS
compares the calculated required reinforcement at the ends of the
beam with that specified in the reinforcement overrides and uses the
larger value to determine the minimum reinforcing in the middle of
the beam.
In the Concrete Frame Design postprocessor when the shear design
of columns is to be based on the maximum moment that the beams
can deliver to the columns ETABS compares the calculated required
reinforcement with that specified in the reinforcement overrides and
uses the larger value to determine the moment capacity of the beam.
For any degree of freedom in the frame nonlinear hinge properties
assigned to a concrete member that is specified as default ETABS
calculates the hinge force-deformation properties based on the larger
of the calculated required reinforcement at the ends of the beam
(assuming you have run the design through the Concrete Frame
Design postprocessor) and the specified reinforcement overrides.

Step 3-4: Add Frame Section for Column
Select on “Add Rectangular” from second drop-down menu.

Step 3-5: Specify Column Section Properties
Specify column section properties as shown in the following figure.

Step 3-6: Specify Reinforcement Data for Column
Click on “Reinforcement” button and specify reinforcement data as shown in the
following figure.
Note for Reinforcing Information for Columns
For columns the following areas are provided in the Reinforcement Data dialog box:
Configuration of Reinforcement: Here you can specify rectangular or circular
reinforcement. You can if desired put circular reinforcement in a rectangular beam or
put rectangular reinforcement in a circular beam.
Lateral Reinforcement: If you have specified a rectangular configuration of
reinforcement then the only choice available to you here is ties. If you have specified
a circular configuration of reinforcement then you have an option of either ties or
spiral for the lateral (transverse) reinforcement.

Rectangular Reinforcement: This area is visible if you have chosen a rectangular
configuration of reinforcement. The following options are available in this area.
• Cover to Rebar Center: This is the distance from the edge of the column to
the center of a longitudinal bar. In the special case of rectangular
reinforcement in a circular column the cover is taken to be the minimum
distance from the edge of the column to the center of a corner bar of the
rectangular reinforcement pattern.
• Number of bars in 3-dir: This is the number of longitudinal reinforcing bars
(including corner rebar) on the two faces of the column that are parallel to the
local 3-axis of the section.
• Number of bars in 2-dir: This is the number of longitudinal reinforcing bars
(including corner rebar) on the two faces of the column that are parallel to the
local 2-axis of the section.
• Bar size: This is the specified size of reinforcing steel for the section. You can
only specify one bar size for a given concrete frame section property.
Circular Reinforcement: This area is visible if you have chosen a circular
configuration of reinforcement. The following options are available in this area.
• Cover to Rebar Center: This is the distance from the edge of the column to
the center of a longitudinal bar. In the special case of circular reinforcement in
a rectangular column the cover is taken to be the minimum distance from the
edge of the column to a circle drawn through the center of all the rebar in the
circular reinforcement pattern.
• Number of bars: This is the number of longitudinal reinforcing bars in the
section.
• Bar size: This is the specified size of reinforcing steel for the section. You can
only specify one bar size for a given concrete frame section property.
Check/Design: In this area you specify that when a member with this frame section
property is run through the Concrete Frame Design postprocessor the reinforcement
is either to be checked or to be designed. If the reinforcement is to be checked then
all information in the Reinforcement Data dialog box is used. If the reinforcement is
to be designed then all information in the Reinforcement Data dialog box is used
except the bar size is ignored and the total required steel area is calculated. For
design the configuration of reinforcement, lateral reinforcement and cover is used.
If you specify reinforcing in a concrete column frame section property that is
specified using the section designer utility then the Concrete Frame Design
postprocessor either checks the column for the specified reinforcing or designs new
reinforcing depending on the option you selected when you specified the section.

Step 3-7: Define Slab Section Properties
Go to Define >> Wall/Slab/Deck Sections, select “SLAB1”, click on “Modify/Show
Section” and specify slab section properties as shown in figure below.
Note for Area Thickness
Thickness: Two thicknesses are specified: membrane and bending. Typically these
thicknesses are the same but they can be different. For instance they may be
different if you are trying to model full shell behavior for a corrugated metal deck.
The membrane thickness is used for calculating:
The membrane stiffness for full shell and pure membrane sections.
The element volume for element self-mass and self-weight
calculations.

The bending thickness is used for calculating the plate-bending and transverse-
shearing stiffnesses for full shell and pure plate sections.
Step 3-8: Define Wall Section Properties
Select “WALL1”, click on “Modify/Show Section” and specify wall section properties
as shown in figure below.

Step 3-9: Select All Beams and Assign “B30x60” Section Properties
Go to Select >> by Line Object Type, select “Beam” to select all beams in model.
Go to Assign >> Frame/Line >> Frame Section and select “B30x60” from section
property list

Step 3-10: Select All Columns and Assign “C50x50” Section Properties
Go to Select >> by Line Object Type, select “Column” to select all columns.
Go to Assign >> Frame/Line >> Frame Section and select “C50x50” from section
property list

Step 3-11: Select All Slabs and Assign “SLABTH15CM” Section Properties
Go to Select >> by Area Object Type, select “Floor” to select all columns.
Go to Assign >> Shell/Area >> Wall/Slab/Deck Section and select
“SLABTH15CM” from section property list

4. Draw Shear Wall and Define Pier Labels
Pier labels will define at shear wall panels in this step for shear wall
design.
Step 4-1: Change View to Plan View and Change Working Unit to “Ton-m”
Activate left window by clicking on left window area, click on Set Plan View button
and select “STORY10”. Change working unit to “Ton-m”

Step 4-2: Add Nodes at Shear Wall Corner Location
Click on Rubber Band Zoom button to zoom plan view at shear wall location,
click on Draw Point Objects button , enter “Plan Offset X” and “Plan Offset Y” in
“Properties of Object” dialogue and click 2 nodes as shown in figure below.
1
22
3
4

Step 4-3: Add 2 Nodes at Shear Wall Corner Location
Repeat Step 4-2 to add nodes at shear wall corner location as shown in figure
below.
1
2
3
4

Step 4-4: Select “All Stories” and Draw Shear Walls
Select “All Stories” at first drop-down menu, click on Draw Wall button and draw
shear walls as shown in figure below.
2
3
1
4
5 6
7

Step 4-5: Assign Pier Label for Shear Wall Design
Click on Select Object button to change to selecting mode, select all shear wall
panels by drawing rectangular cover all shear wall panels, go to Assign >>
Shell/Area >> Pier Label and select “P1”.
Note: For this example, all shear wall panels have been assigned in
same pier labels then ETABS will design all shear wall panels as
3D shear wall (3 panels combined together). Each shear wall
panel can be designed separately as 2D shear wall by assigning
difference pier labels.

5. Define “Similar Stories” Option
Step 5-1: Define Master Story
Go to Edit >> Edit Story Data >> Edit Story, change “Master Story” at “STORY7”
from “No” to “Yes” and change “Similar To” at “STORY1” to “STORY6” from
“STORY10” to “STROY7” as shown in figure below.
Note: “Similar Stories” option in ETABS help user to do duplicate work
at typical stories, when “Similar Stories” is activated, all
assignments on plan view at any stories in similar stories group
will affect to every similar story.

6. Modify Floor Plan at “STORY8” to “STORY10”
To delete all elements in corner of building at “STORY8” to
“STORY10”, slab panel at each floor will be divided manually from
one big panel to 9 panels at frame location.
Step 6-1: Show Shell Panel in Solid Shade
Click on Restore Full View button to view full area of plan, click on Set Building
View Options button and select “Object Fill” and “”Apply to All Windows”

Step 6-2: Select All Slab Panels at “STORY10”
Make sure that current “Plan View” window is at “STORY10”, select “Similar
Stories”, click on Select Object button and draw rectangular to cover all slab
panels in plan
Go to Edit >> Mesh Area and select parameters as shown in figure below

Step 6-3: Delete All Elements at Bottom-right Corner of Building
Select beams and slab panel by clicking on them, select columns by drawing
rectangular to cover column in plan as shown in figure below and click on “Delete”
button in keyboard
Note: Click on Object Shrink Toggle button to see connectivity of each
element

Step 6-4: Draw Beam at Front of Elevator
Use Restore Full View button and Rubber Band Zoom button to change plan
view to elevator location, click on Create Lines or at Clicks button , select
“B30x60” and draw beam at front of elevator

42/97 Seismic Analysis Design of 10 Story RC Building (Equivalent Lateral Force)
Step 6-5: Draw Opening at Elevator Area
Click on Draw Rectangular Areas button , select “OPENING” and draw opening
at elevator area.

Seismic Analysis Design of 10 Story RC Building (Equivalent Lateral Force) 43/97
7. Modify Floor Plan at “BASE” to “STORY7”
Step 7-1: Change View to “STORY7”
Click on Set Plan View button and select “STORY7” and make sure that “Similar
Stories” is selected.

Step 7-2: Draw Beam at Front of Elevator
Use Restore Full View button and Rubber Band Zoom button to change plan
view to elevator location, click on Create Lines or at Clicks button , select
“B30x60” and draw beam at front of elevator

Step 7-3: Draw Opening at Elevator Area
Click on Draw Rectangular Areas button , select “OPENING” and draw opening
at elevator area.

8. Assign Auto Mesh Options at Shell Panels
Each shell panel (slab and shear wall) will be divided into small panels
by using Auto Meshing Option in ETABS. Maximum size of small panel
is not bigger than 1 m.
Step 8-1: Use Auto Mesh on Slab and Wall Panels
Select all elements in building by clicking on Select All button , go to Assign
Shell/Area Area Object Mesh Options and specify parameters as shown in
figure below

Note: Auto mesh side and location can be display by clicking on Set Building View
Options button and selecting “Auto Area Mesh” to view auto area meshing
line.

9. Assign Supports
Step 9-1: Change Plan View to “BASE” and Select All Nodes on “BASE” Floor
Click on Set Plan View button and select “BASE”
Click on Select Object button and draw selection rectangular to cover all nodes,
go to Assign Joint/Point Restraints and select “Fix Support” .
Note: This example focuses on simplify analysis. Spring support will be
demonstrated in some other example.

10. Assign “DEAD” and “LIVE” Load
Uniform load on slab panels for “DEAD” and “LIVE” load have been
assigned from Step 1-2 then step 10-1 and 10-4 can be skipped.
Step 10-1: Assign “DEAD” Uniform Load on Slab Panels
Go to Select By Area Object Type and select “Floor”
Go to Assign shell/Area Loads Uniform and specify parameter as shown in
figure below.
Note: The load from slab will be transferred to beam and column automatically (for
one way, two way, flat slab)

Step 10-2: Assign “DEAD” Uniform Load on Beams
Go to Select By Frame Sections and select “B30x60”.
Go to Assign Frame/Line Loads Distributed and specify parameter as
shown in figure below.

Step 10-3: Change Load Type for “LIVE” Load Case
Go to Define Static Load Case, select “LIVE” load case, change “Type” from
“LIVE” to “REDUCE LIVE” and click on “Modify Load”
Go to Options Preferences Live Load Reduction and select “Tributary
Area (UBC97)” as shown in figure below.

Note:
If this check box is checked, the tributary area live load reduction method based on
Section 1607.5 of the 1997 UBC is used. The basic formula is as follows:
RLLF = 1 - 0.0008(A - 150)
where,
RLLF = The reduced live load factor for an element, unitless. The RLLF is
multiplied times the unreduced live load to get the reduced live
load.
A = Tributary area for the element, ft2
. If A does not exceed 150 ft2,
no
live load reduction is used. See Tributary Area for more
information.
The RLLF factor can not be less than the minimum factor described in the Minimum
Factor Area description.
Note that no check is done to limit the RLLF based on Equation 7-2 in Section
1607.5 of the 1997 UBC.
You may press “F1” key to get more information about RLLF when you are on
the ”Live Load Reduction Factor” dialogue.

Step 10-4: Assign “LIVE” Uniform Load on Slab Panels
Go to Select By Area Object Type and select “Floor”
Go to Assign shell/Area Loads Uniform and specify parameter as shown in
figure below.

11. Define and Assign Wind Load Case
Step 11-1: Add “WINDX” Load Case
Go to Define Static Load Case and enter load case parameters for “WINDX” as
shown in the figure below.

Step 11-2: Specify “WINDX” Load Case
Select “WINDX” from list, click on “Modify Lateral Load” and specify parameters as

Step 11-3: Add and Specify “WINDY” Load Case
Repeat Step 11-1 to 11-2 to add “WINDY” Load Case

Step 11-4: Draw Null Areas at Side of Building for Wind Pressure Coefficient
Click on Set Plan View button and select “STORY10” to change Plan view to
“STORY10”. From “STORY10” plan view, select “All Stories” from first drop-down
menu, click on Create Walls at Regions or at Clicks button , select “NONE” and
draw rectangular cover all side of plan view one by one as shown in figure below.
Note: Dummy Area (Null Area) is shell element with no stiffness to represent curtain
wall or brick wall for wind pressure coefficient assignment. ETABS calculates
wind load by using area of dummy area and wind pressure coefficients
automatically based on selected code at step 10-1 and 10-2

Step 11-5: Assign Windward Wind Coefficient to Null Areas for “WINDX” Load
Case
Click on Select Object button , select null areas on the side of the building, go to
Assign Shell/Area Loads Wind Pressure Coefficient and specify
parameters as shown in figure.
Note: Positive Direction of wind pressure is same as positive direction of local area
axes 3. To check area local axes in shell area, go to View Set Building
View Options or click on Set Building View Options button and select
“Area Local Axes” in “Object View Options”. ETABS will display 3 local axes in
3 color arrows (Red, white and blue to represent 1, 2 and 3 local axes).

Step 11-6: Assign Leeward Wind Coefficient to Null Areas for “WINDX” Load
Case
Select null areas on the side of the building, go to Assign Shell/Area Wind
Pressure Coefficient and specify parameters as shown in figure.

Step 11-7: Assign Windward Wind Coefficient to Null Areas for “WINDY” Load
Case

Step 11-8: Assign Leeward Wind Coefficient to Null Areas for “WINDY” Load
Case

12.Define Static Load Case for Equivalent Seismic Force
Step 12-1: Add “EQXA” Load Case
Go to Define Static Load Case, define load case parameters as shown in figure
below and click on “Add New Load”.

Step 12-2: Specify “EQXA” Load Case Parameters
Select “EQXA” load case from list, click on “Modify Lateral Load” and specify
parameters as shown in figure below.

Step 12-3: Add “EQXB” Load Case and Specify Load Case Parameters
Repeat step 11-1 and 11-2 to add and specify “EQXB” load case parameters

Step 12-4: Add “EQYA” Load Case and Specify Load Case Parameters
Repeat step 11-1 and 11-2 to add and specify “EQYA” load case parameters

Step 12-5: Add “EQYB” Load Case and Specify Load Case Parameters
Repeat step 11-1 and 11-2 to add and specify “EQYB” load case parameters

Step 12-6: Deactivate Special Seismic Load Effect
Go to Define Special Seismic Load Effect and select “Do Not Include Special
Seismic Design Data”

13. Run Analysis and View Results
Step 13-1: Start Analysis
Go to Analyze Run Analysis or click on Run Analysis button to start
analysis.
ETABS will display deformed shape of model when analysis complete.
Note: ETABS will lock the model automatically from undesired changes. Model
will be unlocked by clicking on Unlock Model button . ETABS will delete
all analysis and design results after unlock.

Step 13-2: Check Error from Analysis Run Record
Go to File Last Analysis Run Log and scroll down to check error message.

Step 13-3: Display Deformed Shape in 3D View
Select 3D view window, go to Display Show Deformed Shape and select
desired load from drop-down menu. To view deformed shape in animation, click on
“Start Animation”.

Step 13-4: View Analysis Result Diagrams of Frame Elements (Beam or
Column)
Go to Display Show Member Forces/Stress Diagram Frame/
Pier/Spandrel Forces and select “Load” and “Component”

Note: Sign Convention for Frame Element

Step 13-5: View Analysis Result Diagram at Particular Frame Element
Right click on desired beam to display particular analysis result diagram

Step 13-6: Create Elevation View for Display Analysis Results in Wall Panels
Click on Set Elevation View button and click on “Add New Elevation”
Specify “Location” at wall panels around elevators as shown in the following figure
and table.
Elevation Name X Ordinate Y Ordinate
LIFT LEFT 8 -
LIFT RIGHT 10 -
LIFT BACK - 10

Step 13-7: Change View to Elevation View at Elevator Location
Click on Set Elevation View button and select elevation view at elevator location

Step 13-8: View Analysis Result Diagrams of Shear Wall (Pier)
Right click on desired shear wall panel to view particular diagram
Note: Same as frame element, move mouse cursor over this diagram and see
value at bottom of this window to check analysis results in particular location

Step 13-9: View Analysis Result Contour in Shear Wall Panels (Elevation
View)
Change “Plan View” to “Elevation View” by clicking on Set Elevation View button
and selecting desired elevation for elevator location, go to Display Show
Member Forces/Stress Diagram Shell Stresses/Forces, select “Load” and
“Component”. Right click on desired wall panel to view particular analysis result.
Note: Analysis results at particular location will display at the bottom of window
when move mouse cursor over this diagram.

Note: Sign Convention for Shell Element

Step 13-10: View Analysis Result Contour in Slab Panels (Plan View)
Change to “Plan View” by clicking on Set Plan View button and selecting
desired floor, go to Display Show Member Forces/Stress Diagram Shell
Stresses/Forces and select “Load” and “Component”. Same as shear wall panel,
right click on desired wall panel to view particular analysis result.

Step 13-11: View Analysis Results in Tabular Form
Go to Display Show Output table Mode, select desired items and click on
“Select Loads” to specify load case/combination.
Select analysis results from drop-down menu at top-right of screen
Note: This table can be copied to MS Excel by using Edit Copy menu in this
window (Not main menu).

14.Run Concrete Frame Design and View Results
Step 14-1: Select Design Code
Go to Options Preference Concrete Frame Design and select “ACI 318-99”
from “Design Code”

Step 14-2: View Load Combination for Concrete Frame Design
Go to Design Concrete Frame Design Select Design Combo to view load
combination for concrete frame design. Load combinations have been defined as
selected code from previous step. Select desired load combination from “Design
Combos” column and click on “Show” to view load combination parameters (load
factors and details)
Note: ETABS will define load combination automatically based on selected design
from previous step.

Step 14-3: Start Concrete Frame Design
Go to Design Concrete Frame Design Start Design/Check Structure

Step 14-4: Display Longitudinal Reinforcing for Concrete Frame Design
Select “kg-cm”, go to Design Concrete Frame Design Display Design Info,
click on “Design Output” and select “Longitudinal Reinforcing” from first drop-down
menu.

Step 14-5: Display Shear Reinforcing for Concrete Frame Design
Go to Design Concrete Frame Design Display Design Info, click on
“Design Output” and select “Shear Reinforcing” from first drop-down menu.

Step 14-6: Display Concrete Frame Design in Details
To see concrete frame design in details, right mouse click on desired element. The
highlighted row is the critical location along the element length (maximum required
reinforcement). More details can be displayed by clicking on button below. Click
”OK” to close this dialogue.

15.Run Shear Wall Design and View Results
Typical Shear Wall Design Procedure
Following is a typical shear wall design process that might occur for a
new building. Note that the sequence of steps you may take in any
particular design may vary from this but the basic process will be
essentially the same.
1. After create the building model Use the Options menu Preferences
Shear Wall Design command to review the shear wall design
preferences and revise them if necessary. Note that there are default
values provided for all shear wall design preferences so it is not actually
necessary for you to define any preferences unless you want to change
some of the default preference values.
2. Run the building analysis using the Analyze menu Run Analysis
command.
3. Assign the wall pier and wall spandrel labels. Use the Assign menu
Frame/Line Pier Label, the Assign menu Shell/Area Pier Label,
the Assign menu Frame/Line Spandrel Label, and the Assign
menu Shell/Area Spandrel Label commands to do this.
Note that the labels can be assigned before or after the analysis is run.
4. Assign shear wall overwrites, if needed, using the Design menu Shear
Wall Design View/Revise Pier Overwrites and the Design menu
Shear Wall Design View/Revise Spandrel Overwrites commands.
Note that you must select piers or spandrels first before using these
commands. Also note that there are default values provided for all pier
and spandrel design overwrites so it is not actually necessary for you to
define any overwrites unless you want to change some of the default
overwrite values.
Note that the overwrites can be assigned before or after the analysis is
run.
Important note about selecting piers and spandrels: You can select a
pier or spandrel simply by selecting any line or area object that is part of
the pier or spandrel.

5. If you want to use any design load combinations other than the default
ones created by ETABS for your shear wall design then click the Design
menu Shear Wall Design Select Design Combo command. Note
that you must have already created your own design combos by clicking
the Define menu Load Combinations command.
6. Click the Design menu Shear Wall Design Start Design/Check of
Structure command to run the shear wall design.
7. Review the shear wall design results. To do this you might do one of the
following:
a. Click the Design menu Shear Wall Design Display Design
Info command to display design information on the model.
b. Right click on a pier or spandrel while the design results are
displayed on it to enter the interactive wall design mode. Note
that while you are in this mode you can revise overwrites and
immediately see the new design results.
If you are not currently displaying design results you can click the
Design menu Shear Wall Design Interactive Wall Design
command and then right click a pier or spandrel to enter the interactive
design mode for that element.
1. Use the File menu Print Tables Shear Wall Design command to
print shear wall design data. If you select a few piers or spandrels before
using this command then data is printed only for the selected elements.
2. If desired, revise the wall pier and/or spandrel overwrites, rerun the shear
wall design, and review the results again. Repeat this step as many
times as needed.
3. If desired, create wall pier check sections with user-defined (actual)
reinforcing specified for the wall piers using the Section Designer utility.
Use the Design menu Shear Wall Design Define Pier Sections for
Checking command to define the sections in Section Designer. Be sure
to indicate that the reinforcing is to be checked. Use the Design menu
Shear Wall Design Assign Pier Sections for Checking command to
assign these sections to the piers. Rerun the design and verify that the
actual flexural reinforcing provided is adequate.

4. Assign these check sections to the piers, change the pier mode from
Design to Check, and rerun the design. Verify that the actual flexural
reinforcing provided is adequate.
5. If necessary, revise the geometry or reinforcing and rerun the design.
6. Print or display selected shear wall design results if desired.
Note that shear wall design is performed as an iterative process. You
can change your wall design dimensions and reinforcing during the
design process without rerunning the analysis. However, you always
want to be sure that your final design is based on analysis properties
(wall dimensions) that are consistent with your design (actual) wall
dimensions.
3
per rigid zone
Rigid
Beam
Column
A: Shear Wall with Line Loads B: Finite Element Model
C: Define Beams Columns D: Beam-Column Model

Step 15-1: Change view to “Elevation View”
Click on Set Elevation View button , select desired elevation and use Rubber
Band Zoom button to zoom shear wall view.

Step 15-2: Select Design Code for Shear Wall Design
Go to Options Preference Shear Wall Design and select parameters as

Step 15-3: View Load Combination for Shear Wall Design
Go to Design Shear Wall Design Select Design Combo to view load
combination for shear wall design. Load combinations have been defined as
selected code from previous step. Select desired load combination from “Design
Combos” column and click on “Show” to view load combination parameters (load
factors and details)
Note: ETABS will define load combination automatically based on selected design
from previous step.

Step 15-4: Start Shear Wall Design
Go to Design Shear Wall Design Start Design/Check Structure

Step 15-5: Display Pier Design Information for Shear Wall Design
Go to Design Shear Wall Design Display Design Info, click on “Design
Output” and select “Pier Longitudinal Reinforcing”.
Note: Longitudinal reinforcing area displayed in above figure is for all 3 shear wall
panels because all of them have been assigned in same pier label (P1) as
specified in Step 4-5

Step 15-6: Display Pier Design Details for Shear Wall Design
To see pier design in details, right mouse click on desired pier panel.
Reinforcement Location for Pier

Note: Typical Detailing of Shear Wall

Rcc structure design by etabs (acecoms)

More Related Content

What's hot (20)

Viewers also liked (20)

Similar to Rcc structure design by etabs (acecoms) (20)

More from Md. Shahadat Hossain (15)

Recently uploaded (20)

Rcc structure design by etabs (acecoms)