Staad Example Space

7/27/2019 Staad Example Space

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STAAD

PROBLEM NO.1:

STEP 1 (Creation of Geometry):

New Project Select space Length =meters; Force=KN;

File Name=RCC building 1 Next

Select Open Structure Wizard Finish.

Change to Frame Models from Truss models Select Bay Frame and

double click on it.

Length (Along X Direction)= 7.01m.No. of bays (Span) =2 Click

Bay No.1 =3.05 Bay No.2=3.96Height (Along Y Direction) =14.5m.No. of bays (Span) =5 Click

Bay No.1 =2.50 ; Bay No.2=3.0 ; Bay No.3=3.0 ; Bay Np.4=3.0Bay No.5= 3.0.

Width (Along Z Direction) =10.36m.No. of bays (Span) =3 Click

Bay No.1 =2.74 ; Bay No.2=3.96 ; Bay No.3=3.66 Apply Transfer model Click yes OK Go to Front view icon (first view)Go to Top View Delete the second row first beam Isometric view Confirm the deletion of beam Ok.

STPE 2 (Member Properties):

Front view Select the beam in first top 4 levels by windowing Go to

Isometric view and confirm the selection of beams in X Direction and Z


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direction of top 4 levels beams From Main menu Commands

Member properties Prismatic Rectangular Yd=0.33 Zd=0.23

Assign De select the member and select beam at lower most level

(Plinth beam) From Main menu Commands Member Property

Prismatic Rectangular YD=0.3 ZD=0.23 Assign Close De select

the member and select column member (Go to top view) window the type

1 column of outer column From Main menu Commands Member

Property Prismatic Rectangular YD=0.3 ZD=0.23 Assign

Confirm by viewing the column in isometric view. Go to Top view

Window the type 2 column of outer column From Main view

Commands Member Property Prismatic Rectangular YD=0.23

ZD=0.30 Assign Confirm by viewing the column in isometric view.

Go to Top view Window the type 3 column in intermediate position

From Main view Commands Member Property Prismatic

Rectangular YD=0.33 ZD=0.23 Assign Confirm by viewing the column

in isometric view.

To confirm whether any missing property

Main menu Select Missing attributes Missing Property No entity

missing Property is found Ok.

De select the member.

STEP 3 (Supports):

Change to Node cursor (joint) and select the nodes (joints).


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(If more than one node use CTRL key and select the nodes) From Main

menu Click Front view icon

Commands Support specification Fixed Assign Close

De select the nodes and change to beam cursor.

STEP 4 (Loading ):

From Main menu Commands Loading Primary Load Load case

1=Dead(load) Add Load case2= Live(load) Add Load case

1(dead load) Add Self weight(dead load) Factor=-->1

Direction Y (Beams and columns) Floor load (Dead load of slab)

Pressure=-->3.5(self weight of slab= 2.50 + Floor finish=1.0)

Define Y range Mini=5.50 (2.50+3.0); Max=14.50

Define X range Mini=0; Max=7.01 (3.05+3.96)

Define Z range Mini=0; Max =10.36 (2.74+3.96+3.66) Add Member

load (wall loads) Uniform force W1=--12 (9 wall load Add

W1=-6 (41/2 wall load) Add Close Assign 9 wall load to external

beams and 41/2 wall load to internal beams in top view Select load

case 2(live load) Add Floor load (Live load on slab) Pressure=-2

(Live load)

Define Y range Mini=5.50 Max =14.50

Define X range Mini=0 Max=7.01

Define Z range Mini=0 Max=10.36 Add Close

Main menu commandLoading Load combination Load comb 3

Default=1.50

Available load


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Load case 1Load case 2

>>>

>

2002.


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2. Load Definitions Seismic definitions Add.

3.Seismic Parameter screen appear.


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Zone (for zone III) = 0.016Response reduction Factor =5 (If ductile is provided RF=5; If ductile is

not provided RF =3)Importance factor (I) =1 (For important building I=1.5 & all other

building I=1.0)Soil site factor (SS) =2 ( For hard soil SS=1; Medium soil

SS=2; Soft soil SS=3)Type of Structure (ST) =1 (ST for RC Frame=1; Steel frame =2;All

other buildings =3)Period in X Direction = }(Optional)Period in Z Direction = } (Optional)

Depth of Foundation DT) = 2.50

Add.4. Self weight Add.

5. Copy the Dead Load and Live Load already given below the selfweight.6. Edit Edit input command file.In the Seismic Definition below the self weight, do the following:(i)The member load copied and pasted with load changing to weight(ii)The ve sign changed to + ve sign, GY to be deleted(iii)Also, the Floor load copied and pasted with load changing to weight(iv)The ve sign changed to + ve sign GY to be deleted


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(v)The live load may be reduced to 0.5 times actual Live Load if LL >3.0KN/m2

0.25 times actual Live Load if LL< 3.0 KN/m2).(vi) The Live Load on roof slab need not be considered for this case.


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2.Lumping Masses at Joints:Procedure:

(i) Make a copy of model file(ii) Put pinned supports at column nodes except bottom supports.(iii) Apply Load Combination

Load 1 DLLoad 2 LLLoad Comb 31 1.0 2 0.25

(If LL< 3KN/m2 apply 1.0DL+0.25LL

if LL> 3KN/m2

apply 1.0DL+0.50LL(iv) Run Analysis by using following command.

Perform AnalysisLoad List 3Print Support reactionFinish.

(v) Take vertical reaction at the pinned supports as nodalWeights.

(vi) Apply them as seismic weights.


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Steps:1. Main menu Select Beams parallel to Y2. View View selected objects only.3. Main menu Commands Support Specifications Pinned

Assign.4. Main menu Commands Post analysis Support Reactions.5. Main menu Analysis Run analysis.6. Main menu View Tables Support reactions Ok.7. Select the joint No. and Force Y.8. Copy and Past it in a Excell sheet separately.9. Edit the same as follow:

Joint No. Weight Fy(e.g) 3 weight 8.48.10. Copy the above joint weight and paste it below

Define 1893 loadZone 0.15 RF 5 I 1.0 SS 2 ST 1 DM 0.05 Df 2.5.

..3 weight 8.48

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Staad Example Space