2d Portal Frame

MIDAS

Technical Material

Basic Training Analysis of 2D Portal Frame

00 Contents

Single Span PSC Box Girder Bridge

 Step 1: Initial Setting  Step 2: Structure Definitions

 Step 3: Material & Section Definition  Step 4: Geometric Modelling  Step 5: Boundary Definition

In this tutorial we will learn the following things: - How to analyze 2-D frame section. - How to define boundary conditions and provide Inclined supports.

- How to define and provide static loads, load on nodes and beams.

 Step 6: Load Definition

- How to perform settlement analysis and spring support analysis.

 Step 7: Results

- How to interpret the various results like stresses, deformations represented by midas Civil.

Program Version Revision Date

Civil 2017 (v2.3) June 13, 2018

Step

00

Graphic User interface

Main Menu

Menu Icon (Ribbon Style)

View Control Toolbars

View Tab

Work Tree 2 Work Tree 1

Task Pane Status Bar

Command Line

Message Window

Modeling View Window

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Step

01

1-1 Initial Setting Procedure

2

1

3 4

Invoke midas Civil 1

Open New File

2

Save as ‘RC Column Design’

3

Go to > “Tools”

4

Click on “Unit System”

5

Select the unit system [m, kN(ton),

5

Celcius] 6

Click on OK

.

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Step

02

2-1 Structure definition – Structure Type Procedure

1

5 1

Go to > “Structure”

2

Click on “Structure Type”

3

Select X-Z Plane

4

Click on “OK” to close

5

Go to > Structure > UCS > X-Z Plane

6

Coordinates ‘0,0,0’, Rotation Angle: ‘0’

7

Click on “OK” to close

2

3

3

6

4

7

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Step

02

2-2 Structure definition – Define Point Grid Procedure

1

Go to > Structures >

2

Grid > Define Point Grid >

3

Grid spaces > 1, 1

4

Click > OK

5

Go to > View >

6

Grid > Point Grid (Toggle On)

1

8

2

3

4 7

View > Snap > Point (Toggle On)

8

Click on > Display the Node numbers

5

7 6

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Step

03

3-1 Material & Section Definition – Material Definition Procedure 1

1

Go to > “Properties”

2

Click on “Material Properties”

3

Click on “Add” to define materials

4

Define Material data:

2 4

Name > Fe570 Type of design> Steel

3

Concrete Standard > IS (S) DB: Fe570 5

Click on “OK” to close

3

5

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Step

03

3-2 Material & Section Definition – Section Definition Procedure 1 2

1

Go to > “Properties”

2

Click on “Section Properties”

3

Click on “Add” 4

4

Click on tab “DB/User”

Define Section data: Name > Section Section Type > I-Section

3

Select DB > IS Sect. Name > ISMB 300 5

Click on OK

5

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Step

04

4-1 Geometric Modelling – Create Nodes Procedure

1 1

1

4

Go to > Node/Element > Create

Elements. 2

In Tree Menu Select: Element Type > General

2

5

Beam/Tapered Beam Material > Fe570, Section > Section 3

Click on the given points sequentially with the help of UCS coordinates on the status bar : (U: 0,0,0), (U: 9,0,0), (9,0,0), (9,9,0), (0,9,0) and (9,9,0)

4

Go to Elements> Divide

5

In Tree Menu Select: Equal Distance Number of Divisions x: ‘3’ Click on Select All Click on Apply

3

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Step

05

5-1 Boundary Definition – Defining Supports Procedure

1 1

1

Go to Boundary > Define Supports

2

Go to “Tree Menu (Right snapshot)

Support Type Dx, Dz, Ry (Check on) 3

Click on Select Single

4

Select Node Number: 1

5

Click on Apply

6

Go to “Tree Menu (left snapshot)

3

2 6

Support Type Dz (Check on) 7

Click on Select Single

8

Select Node Number: 4

9

Click on Apply 4

5

8

Rz Dx Dy Ry Rx Dz

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Step

06

6-1 Load Definition – Defining Static Load Cases Procedure

1 2

1

Go to “Load” tab

2

Click “Static Load Cases”

3

Define Static Load Cases

5

Name : “Uniform” Type : “User Defined Load (USER)” Click “Add”

3

Name : “Concentrated” Type : “User Defined Load (USER)” Click “Add” Name : “Horizontal” Type : “User Defined Load (USER)” Click “Add” 4

Click “ Close”

5

Click on > Display Element Numbers .

4

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Step

06

6-2 Load Definition – Element Beam Loads and Nodal Loads Procedure

1

2 6

1

Go to “Load” tab

2

Click “Element Beam Loads” 3

10

4, 8

Go to “Tree Menu” Select Load Case Name “Uniform”

3

Direction > Global Z

7

Enter x1= 0, w= -10, x2= 1 4

Click on Select Single Select elements 2, 6, 7

5 6

Click “Apply”

Click “Nodal Loads” 7

Go to “Tree Menu” Select Load Case Name “Concentrated” Enter Fx= 35 kN

8

Click on Select Single

Select Nodes 2 9 10

Click “Apply”

Click on > Display Element Numbers to

9

Turn off 5

NOTE: The Load and the Load val ue can be displayed using Display > Load Value RCC Bridge

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Step

06

6-3 Load Definition –Line Beam Loads Procedure

1 2

1

Go to “Load” tab

2

Click “Line Beam Loads” 3

4

5

Go to “Tree Menu” Select Load Case Name “Horizontal”

3

Load Type > Trapezoidal Loads Direction > Global X Enter x1= 0, w1= 10, x2= 1, w2 = 15 Direction > Global X Click on nodes 3 and 4 once the

“Nodes for the Loading Line” field turns green 4

Click on > Display Node Numbers to turn off

5

Click on > Perform Analysis

NOTE: To Display or Un-display the load Go to Work Tree Menu > Go to Static Loads > Right click on the case > Click on Display/Undisplay

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Step

07

7-2 Results – Deformations

Procedure

1 2

1

Go to “Results” tab

2

Click “Deformations”

3

Click “Deformed Shape”

4

Go to “Tree Menu”

3

4

Select Load Cases: “Uniform” To view the results in Model View Window, select Components > DXYZ Type of Display> Undeformed, Values Click [..] next to Deform >

Deformation Type > Real Deform Click on OK 5

Repeat the Step 4 for the load case “Horizontal” with Deformation Scale Factor > 2.0

5

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Step

07

7-3 Results – Beam Diagrams

Procedure 1 1

Go to “Results” tab

2

Click “Forces”

3

Click “Beam Diagrams”

4

Go to “Tree Menu” Select “ST:Uniform”

2 4

3

4 6 5

Select Components > My Type of Display> Contour, Values, Legend 5

Click [..] next to Legend> Rank Value Type > Fixed

Decimal Point > 2 Click on OK 6

Click [..] next to Values> MinMax Only, Abs Max (Check on) Click on OK

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Step

07

7-4 Results – Beam Forces

Procedure

1 2

1

Go to “Results” tab

2

Click “Result Tables”

3

Click Beam > Forces

4

Select “Horizontal” in Loadcase/Combination

5

Select all the Part Members

6

Click on Ok

3

5

4

6

NOTE: To Sort the tabular data, Right Click and click on Sorting dialogue RCC Bridge

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