flat slab tutorial midas gen

Contents

Step 1: Model & Automesh

Step 2: Design Parameters

Step 3: Frame Design

Step 4: Slab/Wall Design

Automesh and Slab/Wall Design Tutorial

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Program Version Gen 2010 (v2.1)

Revision Date Sep. 10, 2010

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Automesh and slab / wall design tutorialIntroduction of Meshed Slab / Wall Design

Step

00

This tutorial has been provided to explain how to perform meshed slab and wall design. For this reason, the procedure for general frame

design process were not included. For the users who are not familiar with the general design features of midas Gen, it is recommended to

review RC Design as per EN1992-1-1:2004 and Seismic Design for Reinforced Concrete Building tutorial before going through this

tutorial.

Element type Member type ULS (Ultimate Limit State) Design SLS (Serviceability Limit State) Design

Beam element Beam, Column

Bending without axial force

Bending with axial force

Shear

Stress Limitation

Crack Control

Deflection Control

Wall element WallBending with axial force

Shear -

Plate element

SlabFlexural design (Wood-Armer moment)

Punching shear checking

Stress Limitation (considering cracked moment)

Crack Control

Deflection Control (Uncracked, Cracked)

Wall In-plane Stress -

In Gen 2010 (v1.1), meshed slab and wall design has been newly implemented. The following design features as per EN1992-1-1:2004 are now

available in midas Gen.

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Automesh and slab / wall design tutorialUsage Tip [ Task Pane ]

Step

00

Using the task pane, we can display work procedure, required input items and optional input items for

each analysis and design case. Using the User Defined Task Pane, the user can create a Task Pane

manually.

For the meshed slab wall design feature, TDF file was provided with the tutorial model files for the

users convenience. In order to import the User Defined Task Pane, please follow the procedure below.

1. Go to Task Pane tab in the left panel of the midas Gen window.

2. Click [Task Pane] text from the drop down menu.

3. Click [Import User Defined Page].

4. Select slab desig.tpd file and click [Open] button.

1

3

2

4

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Automesh and slab / wall design tutorialOverview

Step

00

9 m 16 m 9 m 23 m

5 m

6 m

7 m

2 m

12.5

m

Typical Floor Plan

Sectional Elevation

3 m

3 m

3 m

3 m

3 m

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Automesh and slab / wall design tutorial

Eurocode-1:2005

Beam : Concrete Grade C25/30 Column: Concrete Grade C30/37

Designation StorySection Numbe

r

Section Dimension

(mm)

Column1~5F 2 400 x 400

Designation Story Section IDSection Dimension

(mm)

Girder 1~5F 1 500 x 400

Designation Story Thickness IDThickness

(mm)

1 : 0.2 1~5F 1 200

2 : 0.25 Story 2 250

Step

00

Girder Section

Column Section

Wall Thickness

Materials

Applied Code

Details of the building (1)

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Automesh and slab / wall design tutorial

Load Details

Dead Load Self Weight Weight Density: 1 kN/m3

Live Load Pressure LoadShopping areas : 4.0 kN/m2

Office areas : 2.0 kN/m2

Wind Load X-dir./ Y-dir.Eurocode-1(2005)

Terrain Category : II

Earthquake Load X-dir./ Y-dir.

Eurocode-8(2004)

Spectrum Parameters: TYPE 1

Ground Type : B

Importance Factor : 1.0

Step

00 Details of the building (2)

Applied Load

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Automesh and slab / wall design tutorial

Step

01

Procedure

2

3

1 File > Open Project

Select flat slab.mgb.

Click [Open] button.

1-1.Opening the pre-generated model file

3

Open the pre-generated model file.

2

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Automesh and slab / wall design tutorial

Procedure

Model > Mesh >

Auto-mesh Planar Area

Method : Line Elements

Type : Quad + Triangle

Mesh Size : Length : 0.5 m

Material : 1:C25/30

Thickness : 1:0.2000

Domain : 1

Select Select by Plane

Select XY Plane

Click edge of the Roof

to select Roof as a picture

Iso View

Click [Apply]

1

Step

01

2

3

4

5

6

7

8

9

1-2. Auto-mesh planar area (1)

Generate meshed elements for slabs

Specify meshed area for auto-

meshing (Line elements method).

10

7

2

3

4

5

6

8

9

10

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Automesh and slab / wall design tutorial

Procedure

Click > Select elements byidentify

Select Wall > [Add]

Click [Close]

Click [Activation]

> [Activate]

1

Step

01

2

3

4

1-2. Auto-mesh planar area (2)

Generate meshed elements for walls

Specify meshed area for auto-

meshing (Line elements method).

2

3

41

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Automesh and slab / wall design tutorial

Procedure

Step

01 1-2. Auto-mesh planar area (3)

Model >

User Coordinate System >

X-Z Plan

Origin : 39, 4, 0

Click : [Apply] > [Close]

Model > Grids >

Define Point Grids

dx, dy : 1, 1

Click : [Apply] > [Close]

1

2

3

4

Generate meshed elements with

opening

Specify meshed area for auto-

meshing (Nodes method).

4

2

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Automesh and slab / wall design tutorial

Procedure

Model > Mesh >

Auto-mesh Planar Area

Method : Nodes

Draw as a picture below.

Type : Quad + Triangle

Mesh Size : Length : 0.5 m

Material : 1:C30/37

Thickness : 1:0.2500

Domain >Name : 2

Click [Apply] > [Close]

1

Step

01

2

3

4

5

6

1-2. Auto-mesh planar area (2)

Generate meshed elements for walls

Specify meshed area for auto-

meshing (Line elements method).

7

2

4

5

6

1

7

38

8

1

2

9

4

3

7

568

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Automesh and slab / wall design tutorial

Procedure

Model > Mesh >

Auto-mesh Planar Area

Method : Planar Elements

Type : Quad + Triangle

Mesh Size : Length : 0.5 m

Material : 1:C30/37

Thickness : 1:0.2500

Click Select by window

Select as a picture

Domain >Name : 3

Click [Apply]

1

Step

01

2

3

4

5

1-2. Auto-mesh planar area (2)

Generate meshed elements for walls

Specify meshed area for auto-

meshing (Line elements method).

2

1

4

5

6

6

3

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Automesh and slab / wall design tutorial

Procedure

Method : Planar Elements

Type : Quad + Triangle

Mesh Size : Length : 0.5 m

Material : 1:C30/37

Thickness : 1:0.2500

Click Select by window

Select as a picture

Domain >

Name : 4

Click [Apply] > [Close]

1

Step

01

2

3

4

5

1-2. Auto-mesh planar area (2)

Generate meshed elements for walls

Specify meshed area for auto-

meshing (Line elements method).

2

1

4

5

6

6

3

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Automesh and slab / wall design tutorial

Procedure

Click Activate All

Toggle off Point Grid

Tree Menu > Work >

Domain1 [1] > Double Click

Load > Pressure Loads

Load Case Name : LL

Direction : Local z

Loads : P1 : -4.0kN/m2

Shopping areas

D1 : Areas in general retail shops

Click [Apply] > [Close]

1

Step

02

2

3

4

5

2-1. Pressure loads (1)

6

Apply floor loads. 12

4

5

6

7

7

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Automesh and slab / wall design tutorial

Procedure

Tree Menu > Work >

Domain1 [2] > Double Click

Load > Pressure Loads

Load Case Name : LL

Direction : Local z

Loads : P1 : -2.0kN/m2

Office areas

Click [Apply]

1

Step

02

2

3

4

5

6

Apply floor loads.

2-1. Pressure loads (2)

3

4

5

6

1

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Automesh and slab / wall design tutorial

Procedure

Model > Building >

Building Generation

Number