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Tutorial

MIDAS

Material

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00

Overview

- A two span of 23m long composite bridge consisting of five precast, post tensioned girder beams sp

aced at 3m centers are generated using beam elements with defined construction stages.

- The behavior of the bridge under Static loads, Prestress loads and Moving loads are examined

In this tutorial we will learn the following things;

-

How to generate composite sections in midas Civil.

-

How to assign static and prestress load in midas Civil.

-

How to define moving load as per Eurocode in midas Civil.

-

How to define composite section for construction stages in midas Civil.

-

How to interpret the tendon losses, forces, stresses represented by midas Civil.

-

How to formulate load combinations in midas Civil.

-

How to carry out PSC composite design as per Eurocode in midas Civil.

2-Span PSC Composite I Girder Bridge

Program Version Civil 2016 (v1.1)

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 Bridge Type:

PSC composite bridge (Composite I + girder)

 Span Length:

23-m, 2-Span

 Width:

15 m

 Moving Loads:

Eurocode

 Time Dependent Material:

Eurocode

(4)

General Arrangement Detail of the Bridge

00

3D View of the Model generated in midas Civil

Mid Section

End Section

3m

0.25m

0.15m

0.10m

0.50m

0.30m

0.45m

0.45m

0.50m

0.025m

0.15m

1.20m

0.15m

0.10m

1.525m

(5)

General Arrangement Detail of the Bridge

00

 Structural sections

 Expansion Gap between the 2 spans is 40mm.

 Girders are spaced 3m c/c.

Support

Section

Tapered

Section

Mid Section

2m

3m

6.5m

0.45

m

0.3m

Half Girder Elevation

CL of Girder

(6)

Invoke midas Civil

Open New File

Select the Unit System [ kN, m]

Save as ‘2-Span PSC Bridge’

Modeling >

Generating Model

01

1

2 3

Model Generation – Define

Units

.

1 3

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Go to “Properties”

Click on “Material Properties”

Click on “Add” to define materials

Define Material data:

Name > C35/45

Type of design> Concrete Concrete Standard > EN04(RC) DB: C35/45

Click on Apply Name > C25/30

Type of design> Concrete Concrete Standard > EN04(RC) DB: C25/30

Click on Apply Name > Diaph

Type of design> Concrete Concrete Standard > EN04(RC) DB: C35/45

Click on Apply Name > Substructure Type of design> Concrete Concrete Standard > EN04(RC) DB: C25/30

Click on Apply Name> Tendon Type of Design: Steel

Steel Standard: EN05(S) DB: S235 Click on Apply Click on OK

01

1 2 3 4

Model Generation – Material

Properties

Modeling >

Material Properties

2 3 4 5 1 5

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01

1 2 3 4 5

Model Generation – Time

Dependent Material Properties

Change unit system [ N, mm ]

Go to “Properties”

(Creep/Shrinkage)”

Click on “Add” to define properties

Define Creep / Shrinkage data:

Name > C35/45 C&S Code > European

Compressive strength of concrete at the age of 28 days > 35 N/mm2

Relative Humidity of ambient environment (40–99) > 70

Notational size of member > 1000mm Age of concrete at the beginning of shrinkage > 3 days

Click on Apply Name > C25/30 C&S Code > European

Compressive strength of concrete at the age of 28 days > 25 N/mm2

Other data are same as above Click on Apply

Click on Show Result to see the

graph

7

Modeling >

Time Dependent Material Properties

6 2 3 1 4 5 7 6

Note: To get the creep & shrinkage strains, the value of relative humidity is to be considered as 70%, Notational size of member, h as 1000mm and Age of concrete at the beginning of shrinkage as 3 days. Later, the h value would be automatically updated for composite sections

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01

1

2 3

4

Model Generation – Time

Dependent Material Properties

Go to “Properties”

Click on “Comp. Strength”

Click on “Add” to define properties

Define Compressive Strength data:

Name > C35/45 Comp Type > Code

Development of Strength > Code >

European)

Mean compressive strength of concrete at age of 28 days (fck+delta_f) > 43N/mm2

Click on Redraw Graph Click on OK

Click on Add

Name > C25/30 Comp Type > Code

Development of Strength > Code >

European

Mean compressive strength of concrete at age of 28 days (fck+delta_f) > 33N/mm2

Click on Redraw Graph Click on OK

Modeling >

Time Dependent Material Properties

2 1 5 6 4 3 5 6

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01

1 2 3 4 5

Model Generation – Time

Dependent Material Link

Go to “Properties”

Click on “Material Link”

Time Dependent Material Link Data

Creep/Shrinkage > C35/45 C&S Comp. Strength > C35/45 Comp Double click on C35/45 under Materials to shift it to the Selected Materials list

Click on “Add / Modify”

Repeat steps 4 to 7 with following input:

Creep/Shrinkage > C25/30 C&S Comp. Strength > C25/30 Comp Double click on C25/30 under Materials to shift it to the Selected Materials list

Click on “Add / Modify” Click on “Close”

6

Modeling >

Time dependent Material Link

2 1 7 6 8 4 5 7 8

Any time during the modeling, analysis and design stage, invoking F1 key takes you to web help.

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01

1

2

4 5

Model Generation – Defining

Girder Support Section

Change unit system [ KN, m ]

Go to “Properties” > Section

Properties”

Click on “Add..”

Click on tab “Composite”

Select Section type

“Composite-General”

Import “mid section sec file”

created using SPC.

Enter Section Name as “Mid”

Check option “Composite Section

for PSC Design” & Enter Web

Thick. For Shear (total) as

“0.4m”

Click “Change Offset”

Select Offset : Center- Top Click “OK”

Click “Apply”

Modeling >

Defining Section

2

4 1

3

6

Note: For getting the correct transformed properties of the composite section, the material properties for slab and girder should be defined accordingly in SPC (Section property Calculator) for creating the section.

10 3 9 6 7 5 7 8 9 8 10 3

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01

1

Model Generation – Girder Mid

Select Section type

“Composite-General”

Import “support section sec file”

created using SPC.

Enter Section Name as “Sup”

Check option “Composite Section

for PSC Design” & Enter Web

Thick. For Shear (total) as

“0.9m”

Click “Change Offset”

Select Offset : Center- Top Click “OK”

Click “Show Calculation Results”

Click “Apply”

Modeling >

Defining Section

4

2

4

Note: Invoke the section data window by following Steps 1 to 4 in Page 11.

3 2 7 1 6 5 7 3 5 6

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01

1

2 3

Model Generation – Defining Tapered Section

.

Click on tab “Tapered”

Select “Composite General Section”

Define Taper Right Section:

Enter name as “Mid-Sup”

Click “Import Section” for section-i and import “mid section sec

file”

Click “Import Section” for section-j and import “support section

sec file”

Check option “Composite Section for

PSC Design” & Enter Web Thick.

For Shear (total) as “0.4m” and “0.9m” as shown for i and j ends respectively

Click “Change Offset”

Select Offset : Center- Top Click “OK”

Click on “Apply”

6

Modeling >

Defining Tapered Section

1

7

Note: The internal Process of calculation of sectional property as per dimensional variation is explained in the help file. Path: Help > Contents > Start > Model >

Properties > Section > Tapered tab, under Note, click on ‘Details’ 2 4 5 7 6 8 5

Note: Invoke the section data window by

following Steps 1 to 4 in Page 11. 3

8 4

Similarly Define Taper Left Section:

Enter name as “Sup-Mid”

Click “Import Section” for section-i and import “support section

sec file”

Click “Import Section” for section-j and import “mid section sec

file”

Check option “Composite Section for

PSC Design” & Enter Web Thick.

For Shear (total) as “0.9m” and “0.4m” as shown for i and j ends respectively

Click “Change Offset”

Select Offset : Center- Top Click “OK”

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01

1

2 3

Model Generation – Defining

Cross Girder Section

Go to “Properties”

Click on “Section Properties”

Click on “Add..”

Click on tab “DB/User”

Define End Diaphragm:

Name > End Diaphragm Section Type > Solid Rectangle Select “User”

H > 1.4m, B > 0.45m Click “Change Offset” Select Offset : Center- Top Select Vertical Offset: “User”

User offset Reference: Extreme fiber(s) Enter value of I: > -0.25

Click on “Apply”

Define Internal Diaphragm:

Name > Internal Diaphragm Section Type > Solid Rectangle Select “User”

H > 1.4m, B > 0.3m Click “Change Offset” Select Offset : Center- Top Select Vertical Offset: “User”

User offset Reference: Extreme fiber(s) Enter value of I: > -0.25

Click “Show Calculation Results”

Click on “OK”

Modeling >

Defining Section

2 5 7 6 1 4 6

Note: To define prismatic sections in midas Civil, go to Models > Properties > Section > Value and here enter the section properties directly instead of section dimensions. To know how sectional properties are calculated go to Help > Contents > Start > Model > Properties >

Section > Section Properties

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5

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01

1

2 3

5

Model Generation – Defining

Pier Cap & Pier Sections

Go to “Properties”

Click on “Section Properties”

Click on “Add..”

Click on tab “DB/User”

Define Pier Cap :

Name> Mid Pier Cap

Section Type > Solid Rectangle Select “User”

H > 1.5m, B > 1.5m Click “Change Offset” Select Offset : Center- Top Click on “Apply”

Define Pier:

Name > Pier

Section Type > Solid Track Select “User”

H > 1.5m, B > 3m

Click “Show Calculation Results”

Click on “OK”

Modeling >

Defining Section

2

5 1

4

6 7

Note: To define prismatic sections in midas Civil, go to Models > Properties > Section > Value and here enter the section properties directly instead of section dimensions. To know how sectional properties are calculated go to Help > Contents > Start > Model > Properties >

Section > Section Properties

4

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01

2

3

4

Model Generation – Creating

Elements (Girder Mid)

Click on “Structure”

Click on “Prestressed Composite

Bridge” wizard

Enter Span information as [email protected] ”m Enter Deck width as “ 15 ” m Enter Spacing(a) as “ 0.04 ” m & Spacing(b) as “ 0.5 ” m

Enter Elastic link Stiffness for bearings of Abutment & Pier as

Kx = “1e+8” kN/m Ky = “1000” kN/m Kz = “1000” kN/m

Enter Elastic link length as “0.1”m Select Material for Pier and Pier-cap as “Substructure” , select Section as “Pier-Cap” & enter its Length as “13.5”m

Select Section as “Pier” & enter its Height as “10”m

Modeling >

Creating Elements

1 5 3 2 6 1 8 4 5 6 7 7 8 9 9

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01

2

3

4

Model Generation – Creating

Elements (Girder Mid)

Click on “Section” tab

Enter Deck Thickness as “ 0.25”m Select Deck material as “ C25/30 ” Select Girder material as “ C35/45 ” Select Diaphragm material as “ Diaph” Enter Number of Girders as “5” and

click “Apply” and enter girder offsets as “-6, -3 , 0, 3, 6” respectively for girders “1 to 5” Select Diaphragm sections at End &

Pier support locations as “End

Diaphragm” and for

intermediate diaphragm as “Internal Diaphragm” For Transverse deck element, select

“ Divisions per span ” and number of divisions as “21” Enter No. of Divisions as “5” and click

“Apply”. Select sections and enter end lengths as shown. Repeat Step 7 for “Span2”

Uncheck “Generate 10thpoints..” option

Modeling >

Creating Elements

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01

2

3

4

Model Generation – Creating

Elements (Girder Mid)

Click on “Tendon” tab

Click “ …” to define Tendon property

Click “Add”

Enter Tendon Name “Tendon” Select Tendon Type

“Internal(Post-Tension”

Select Material “Tendon”

Click “…” in the dialog box for Total Tendon Area

Select Strand Diameter “15.2mm(0.6”)”

Enter Number of Strands “12” Click “OK”

Enter Duct Diameter “0.09”m Select Relaxation Coefficient “European – Low”

Click “OK” Click “Close”

Modeling >

Creating Elements

2 1 3 4 5 5 1

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01

2

3 4

Model Generation – Creating

Elements (Girder Mid)

Enter Tendon Data in the table

as Shown

Change Jacking Stress to

“1395000” kN/m^2

Click “Add”

Change Segments to “Span2” &

repeat Step3

Modeling >

Creating Elements

1 1

2

3 4

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01

4

5 1

Model Generation – Creating

Elements (Girder Mid)

Click on “Load” tab

Enter widths

b1= b5 = “0.5”m

b2= b4 = “7”m

b3= “0”m

Enter wet Con’c density as

“25”kN/m^3 & Thickness

as “0.25”m

Enter Crash Barrier load intensity

as “9”kN/m. Also uncheck

the option of “Median

Strip” loading

Enter Wearing Surface load

Density as “22”kN/m^3 &

Thickness as “0.1”m.

Modeling >

Creating Elements

3 3 4 5 2 1 2

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01

4 5 1

Model Generation – Creating

Elements (Girder Mid)

Click on “Construction Stage”

tab

Check “Reinforcement” option

and Click on “Define

Reinforcement…”

Select “Mid section”

Click on “Multi Add”

Enter Reinforcement data as

shown in the tables

click “OK”

Click “Apply”

Modeling >

Creating Elements

3 2 1 2 3 4 5 6 6 7 7

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01

4 5 1

Model Generation – Creating

Elements (Girder Mid)

Click on “Construction Stage”

tab

Check “Reinforcement” option

and Click on “Define

Reinforcement…”

Select “Mid section”

Click on “Multi Add”

Enter Reinforcement data as

shown in the tables

click “OK”

Click “Apply”

Modeling >

Creating Elements

3 2 1 2 3 4 5 6 6 7 7 Note:

In case the diameter of rebars is not in terms of P(dia), then change the rebar material code from Tools  Preferences Design  Concrete Rebar Material Code Select IS(RC) & Click OK

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01

4 5 1

Model Generation – Creating

Elements (Girder Mid)

Click on “Shear Reinforcement”

Enter Shear Reinforcement data

under “Diagonal

Reinforcement” as

Pitch: 0.15m

Angle: 90 [deg]

Aw: 0.0004022 m^2 (2Legs

of P16)

Click “Apply”

Click “Copy Reinforcements to..”

Select “Sup” Section and

Click “ -> ”

Click “OK”

Click “Close”

Click “OK” in the wizard window.

Modeling >

Creating Elements

3 2 1 2 4 6 7 3 5 6 7 8 8

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01

2

3

4

Model Generation – Creating

Elements (Girder Mid)

Click on “Node/Element” tab

Click on “Translate” Elements

option.

Type “1to22by3” in element

selection box, press Enter

Goto Works menu

Select “Move” option for

translation

Enter distance

dx,dy,dz: “ 0.5,0,0 ”m

Click ”Apply”

Type “3to24by3” in element

selection box, press Enter

similar to Step3

Change distance to

dx,dy,dz: “ -0.5,0,0 ”m

similar to Step5

Click ”Apply” as in Step6

Click ”Close”

Modeling >

Creating Elements

1 1 3 4 5 5 6 6 7 8 8 9 9 2

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01

2

3

Model Generation – Creating

Elements (Girder Mid)

Switch to Front View by clicking

the button as shown

Goto Tree Menu  Works

SectionDouble click on

“Sup” section to select

relevant elements

Click on “Activate” button

Click on select by window button

and select elements

as shown.

Drag and Drop “Sup-mid”

section from Tree Menu in

the Model Window.

Modeling >

Creating Elements

1 4 5 1 2 3 4 X X 5

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01

2

3

Model Generation – Creating

Elements (Girder Mid)

Switch to Front View by clicking

the button as shown

Goto Tree Menu  Works

Section Double click on

“Sup” section to select

relevant elements

Click on “Activate” button

Click on select by window button

and select elements

as shown.

Drag and Drop “Mid-Sup”

section from Tree Menu in

the Model Window.

Click on “Activate All” button to

view the whole structure.

Modeling >

Creating Elements

1 4 5 1 2 3 4 X X 5 6 6

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01

2

3

Model Generation – Defining

Tapered Section Groups

Right Click on the ribbon as shown

Check the “Tree Menu 2 “ Option

and another Tree menu will

appear on the right hand side.

Click on “Properties”

Click on “Tapered Group”

Go to “Tree Menu”

Set Group Name as “Mid-Sup” Go to Tree Menu 2, Double Click on

Mid-Sup Section & the element list

will be updated as “95to98 125to128 153to156 183to186 211to214 241to244 269to272 299to302 327to330 357to360”

Click on “Add”

Set Group Name as “Sup-Mid” Go to Tree Menu 2, Double Click on

Sup-Mid Section & the element list

will be updated as “77to80 107to110 135to138 165to168 193to196 223to226 251to254 281to284 309to312 339to342”

Click on “Add” Click on “Close”

Modeling >

Define Taper Groups

2 6 1 8 1 4 3 6 4 7 7 8

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01

2

3

4

Model Generation – Creating

Elements (Girder Mid)

Click on “Node/Element” tab

Click on “Translate” Elements

option.

Type “244to252” in node

selection box, press Enter

Goto Works menu

Unselect “Only Free Nodes”

option for translation

Click ”Apply” & “Close”

Modeling >

Editing Geometry

1 1 3 4 5 5 2

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01

2

3

Moving Loads– Creating Cross

Element Structure Group

Switch to Front View by clicking

the button as shown

Goto Tree Menu  Group tab

Right Click on “Structure Group”

& click “New”

Give the structure Group Name

as “LL-Cross Beam“

Change Selection of “y” direction

elements only from

bottom ribbon.

Use button to select the

whole superstructure in

front view as shown.

Drag and drop “LL-Cross Beam”

structure group over the

model window.

Change Selection by direction to

“none”.

Load >

Creating Live Load Distribution Group

1 4 6 1 4 2 7 3 5 5 7 6 8 8

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02

1

2 3

Moving Loads – Define Lane

Go to “Load” tab

Click “Moving Load”

Select “EUROCODE” under Moving

Load Code.

Click “Traffic Line Lanes”

Click “Add”

Enter Lane Name “Lane1” View the figure provided Enter Lane Width “3”m Enter Eccentricity “-4.5”m Enter Wheel Spacing “2”m

Select Vehicular load distribution “Cross beam”

Select cross beam group LL-Cross Beam Select Moving direction as “Both” Select Selection by “2 Points” Click in the “Box”

Click on node no. 5 Click on Node no. 6 Click “OK”

For other lanes, similarly change

names, wheel spacing and

eccentricities as below by reapeating

Steps 5 to 7:

Enter Lane Name “Lane2” Enter Lane Width “3”m Enter Eccentricity “-1.5”m Enter Wheel Spacing “2”m

Load >

Defining Loads

1

2

Node no. 5

Node no. 6

Moving Loads – Define Lane

Enter Lane Name “Lane3” Enter Lane Width “3”m Enter Eccentricity “1.5”m Enter Wheel Spacing “2”m Enter Lane Name “Lane4” Enter Lane Width “3”m Enter Eccentricity “4.5”m Enter Wheel Spacing “2”m Enter Lane Name “RA1” Enter Lane Width “1.5”m Enter Eccentricity “6.75”m Enter Wheel Spacing “0.9”m Enter Lane Name “RA2” Enter Lane Width “1.5”m Enter Eccentricity “-6.75”m Enter Wheel Spacing “0.9”m

4 6 4 7 3 5 5 6 7

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02

1

2 3

Moving Loads – Define Lane

Go to “Load” tab

Click “Moving Load”

Click “Vehicles”

Click “Add Standard”

Click “OK” to add Load Model 1

Load >

Defining Vehicles

1 2 4 3 4 5 5 6

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02

1

2 3

Moving Loads- Load Cases

Go to “Load” tab

Click “Moving Load”

Click “Moving load Cases”

Click “Add”

Enter Load Case Name as

“LM1_1.0TS+1.0UDL”

Check “Ignore Psi Factor” Option

Select all lanes from left and click on

->

” to bring all the lanes in

the selected lanes list.

Select Lanes “RA1 & RA2” from

selected lanes list and

click “

->

” to move them under

Remaining Area List.

Click “OK”

Click “Close”

Load >

Defining Moving Load Cases

1 2 4 3 4 7 5 5 6 8 9 6 7 8 9 10 10

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02

1

2 3

Go to “Load” tab

Click on “Construction Stage”

Click “Composite Section for C.S”

Click “Update all H”

Click “OK”

Select “Mid” Section definition

Click “Modify…”

Change Age for Part1 to “21”days and

Part2 to “7”days

Click “OK”

Repeat Step5 to Step7 by selecting

“Sup” Section definition

1 2 4 3 4 5 5 8 9 6 7 8 9 10 7 6

Construction Stage>

Composite Section Definition

Construction Stage – Comp.

Section Definition for Girder

Elements

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02

1

2 3

Construction Stage – Comp.

Section Definition for Girder

Elements

Click “Add”

Select “Stage2”

Select “Mid-Sup” section

For Part1 :

Enter Age as “21” days and h as

“0.439”m

For Part2 :

Select Material Type  “Material”

Select Material  “C25/35”

Select Composite Stage  “Stage3-2”

Enter Age as “7” days and h as “0.23

Click “OK”

Repeat Step1 to Step5 by selecting

“Sup-Mid” Section in Step3

Click “Close”

Construction Stage>

Composite Section Definition

4 2 5 4 5 1 3 6 7 7

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5

03

1

2 3

Moving Load Analysis Control

Go to “Analysis” tab

Click “Moving Load”

Enter Distance between points : 0.3m

Select Analysis Results Frame

“Normal + Concurrent Force”

Check “Combined Stress Calculation”

Click “OK”

Analysis >

Moving Load Analysis Control

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03

1

2

Construction Stage Analysis

Control

Go to “Analysis” tab

Click “Construction Stage”

Change Beam Section Property

Changes to “Constant”

Click “OK”

Analysis >

Construction Stage Analysis

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03

1

2

Run Analysis

Go to “Analysis” tab

Click “Perform Analysis”

Analysis >

Perform Analysis

2 1

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04

1

2

Load Combination

Go to “Results” tab

Click “Load Combination”

Click “Concrete Design” tab

Click “Auto Generation…”

Select Design Code “Eurocode 0”

Select “ST+CS”

Select “Both” option

Click “OK”

Click “Close”

Result>

Combination

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04

1

2

Service Stage Stresses

Go to “Results” tab

Click “Stresses” “Beam Stresses

Diagram”

Select Load Combination “CBCmax:

cLCB3” which is the critical service

combination

Select “Part1” which is Girder part

Select point “4(-y,-z)” for viewing

stresses at bottom left corner of the I

girder.

Check the “Legend option” option

Click “Apply”

Change the units to “N,mm”

Result>

Service Stage Stresses

3 1 5 6 4 7 8 3 2 4 5 6 7 8

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04

1

2

Design as per Eurocode

Go to “PSC” tab

Select “Eurocode2-2:05” and click on

“Parameters”

Click “Select All”

Click “OK”

Select “Part1” which is Girder part

Result>

Design

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04

1

2

Design as per Eurocode

Click “PSC Design Material”

Click “C35/45” in Material List

Select for Girder concrete Material

Code: EN04(RC)

Grade: C35/45

Select for Girder Rebar Material

Code: EN04(RC)

Grade of Main Rebar: Class B

Grade of Main Rebar: Class B

Select for Slab concrete Material

Code: EN04(RC)

Grade: C25/30

Select for Slab Rebar Material

Code: EN04(RC)

Grade of Main Rebar: Class B

Grade of Main Rebar: Class B

Click “Modify” & “Close”

Result>

Design

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04

1

2

Design as per Eurocode

Click “Design/Output Position”

“Design Position”

Type “318 331” elements nos in the

element selection box and press enter

Click “Apply” & “Close”

Click “Design/Output Position”

“Output Position”

Repeat Step2

Click “Apply” & “Close”

Result>

Design

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04

1

2

Design as per Eurocode

Click on “Shear Connector” option

Type “318 331” elements nos in the

element selection box and press enter

Enter Interface Shear Input as:

Angle: 0 [deg]

Aw: 2355 mm^2

Fy: 500 N/mm^2

Click “Apply” & “Close”

Click “Perform Design” button to

perform design

Click “Excel Report” button after

performing design to get design

output in excel sheet format for

elements 318 & 331

Result>

Design

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04

1

2

Result Verification

Go to “Results” of Main Menu

Click “Stresses”

Click “Beam Stresses”

Select Load Cases/Combinations “

Select “Components”

Click Type of Display “Contour”

Click “Apply”

See the Contour diagram in the

“Model View” window

Result>

Stresses

3 4 3 5 6 2 1 7 4 5 6 7 8 8

Note: To view the results in tables,

click Results Tables and browse

to required quantity

Note: The significance of various stress components are clearly explained in detail in the help file . Path: Help > Contents > Start > Result > Stresses > Beam Stresses

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04

1

2

Result Verification

Go to “Results” tab

Click “Result Tables”

Click “Tendon”

Click “Tendon Loss”

See the various tendon loss in tabular

format in the window

“Result-[tendon Loss (Tendon Group)]”

Result>

Tendon Loss

3 4 3 5 2 1 4 5

Note: Similarly the tables of tendon

Coordinates,

Elongation

,

Weight can be checked.

By grouping the tendons, the average prestress force at the CG of the cables along the length of the bridge can be seen in Tendon Arrangement (Path: Results > Result Tables > Tendon > Tendon Arrangement.)

(46)

04

1

2

Result Verification

Go to “Results” tab

Click “Result Tables”

Click “Elastic Link…”

Check “LM1_1.0TS+1.0UDL(Mv:max)”

Click “OK”

See the various forces in the bearings

in “Result-[Elastic Link]”

Result>

Elastic Link Forces (Bearing Forces)

3 4 3 2 1 4 5

Note: Similarly, forces for all the cases

could be viewed, which could

be used for design of bearings.

5 6

(47)

05

Additional Features

(1) DXF Import

Important considerations:

 Polyline in dxf file will be imported as a plate elements.

 Surface in dxf file will be imported as a plate element.

 Solid cannot be imported.

 Unit system must be consistent.

import

Line

Polyline Rectangle

import

3-D Face

import

Beam Elements

Plate Element

(48)

05

Additional Features

(2) Integral Bridge

• Using the formulation proposed by B.M. Lehane, soil springs can be assigned.

• To account for this characteristic of the soil, lateral springs are modeled as compression-only

(49)

05

Additional Features

(3) Loads

Self weight

Specified Displacement of Supports

Pressure Load

Temperature Load

System Temperature - for applying the change in temperature to whole structure.

 Nodal Temperate – for applying change in temperature to certain nodes.

 Element Temperature –for applying change in temperature to certain elements.

 Temperature Gradient – for applying change in temperature to beam and plate sections.

 Beam Section Temperature – for applying temperature gradient to beam sections (General

Sections and PSC sections).

(50)

05

Additional Features

(4) Section Property Calculator

• The Import function permits the use of AutoCAD

DXF files.

• Simple data entry using various modeling functions

• The section property calculations are provided for

the input section configuration by generating fully

automated optimum meshes.

• The properties of hybrid sections composed of

different material properties can be calculated

(51)

Bridging Your Innovations to Realities

References

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