midas gen - cspfea

Gen 2014 Gen 2014 (v1.1) Release Note

Integrated Design System for Building and General Structures

midas Gen Release Note Release Date : Jan. 20, 2013

Product Ver. : 2014(v1.1)

Gen 2011 (v2.1) Release Note

Enhancements

Design 13

(1) Continuous beam strip footing design

(2) Combined wall design

(3) General column design

Analysis

(1) Accidental eccentricity for the flexible floor diaphragm in the response spectrum analysis

11

Pre/Post-Processing

(1) Revit 2014 Interface

15

midas Gen Analysis Enhancement Gen 2014 (v1.1) Release Note

3 / 15

1. Accidental eccentricity for the flexible floor diaphragm in the response spectrum analysis

• In the previous version, the accidental eccentricity could not be considered in case of flexible floor diaphragm when

performing response spectrum analysis. Now, it is supported in a following way:

• Accidental torsion is considered for each individual masses, instead of total masses.

• Accidental torsion is calculated by the product of inertia force and accidental eccentricity at each masses and applied as a

static load case.

• For a given earthquake, the program selects the absolute maximum accidental torsion among four cases of eccentricities by

each masses.

Model > Building > Story

Load > Response Spectrum Analysis Data > Response Spectrum Load Cases

Positive and negative eccentricity for the earthquake direction

Positive and negative eccentricity for the direction orthogonal to earthquake direction

midas Gen Design Enhancement Gen 2014 (v1.1) Release Note

4 / 15

1. Continuous beam strip footing design

• Continuous Beam Strip footing (or CBS footing) is generally constructed on the soft ground and used where longitudinal

bending moments are a major problem for the foundation design.

• CBS footing and ground resistance are modeled by beam elements and Point Spring Supports, respectively in midas Gen.

• CBS footing is designed / checked as per EN 1992-1-1 in the new design module, midas Design +.

Tools > midas Design +

Modeling and analysis in midas Gen

Design/Check in midas Design +

Member dimensions and forces are automatically exported to midas

Design +.


5 / 15

• The dimension of Continuous Beam Strip footing is determined as follows:

Footing Width

Foo

tin

g T

hic

knes

s

1) The rectangular beam marked in red is designed from the longitudinal moment and shear.

2) The bottom width of strip footing is determined from allowable bearing pressure which is entered by user.

3) The thickness and reinforcements in the cantilever are determined from the moments and shear forces due to soil pressure which is taken from the soil pressure calculated by the program.


6 / 15

• Footing reinforcement drawings are provided. The drawings can be exported in *.dwg format file.

Strip Foundation Drawings


7 / 15

• Quantities for reinforcement, concrete, and form can be viewed in a table format. It can also be exported in MS excel

format file.

Quantity


8 / 15

2. Combined wall design

• In the previous version, only straight wall elements were designed/checked individually. Now, combined wall elements (L-,

T-, U-, I-, etc) can be checked as integral units as per EN 1992-1-1.

• Combined walls are modeled and analyzed by wall elements assigned same wall ID in midas Gen.

• Combined walls are checked as per EN 1992-1-1 in the new design module, midas Design +.

Tools > midas Design +

Member dimensions and forces are automatically exported to midas Design +.

Modeling and analysis in midas Gen

Code check in midas Design +


9 / 15

• The typical procedure is as follows:

midas Gen

1. Create combined walls and perform analysis.

2. Generate load combinations.

midas Design +

1. Import member forces (Axial force, moments and shear forces), cross-section and height of walls.

2. Moment magnification due to second order effect.

3. Define longitudinal reinforcement and shear reinforcement.

4. Calculate effective width of flange as per 5.4.3.4.1 of EN 1998-1. For the calculation of flexural resistance, the

effective flange width on each side of a web is taken to extend from the face of the web by the minimum of:

a) The actual flange width

b) One-half of the distance to an adjacent web of the wall and

c) 25% of the total height of the wall above the level considered

5. Design of combined wall - Bending with axial force using P-M interaction

diagram generated as per 6.1 of EN 1992-1-1

6. Design of combined wall - Shear as per 6.2 Shear of EN 1992-1-1. It is

assumed that shear forces will be resisted only by the walls which are

parallel to the shear force.

7. Check detailing of walls as per 9.6 of EN 1992-1-1.


10 / 15

• Combined wall reinforcement drawings are provided. The drawings can be exported in *.dwg format file.

Shear Wall Drawings


11 / 15

• Reinforcement, concrete quantities and form area are provided in a table format. It can also be exported in MS excel

format file.

Quantity


12 / 15

3. General column design

• Columns with general or non-typical shape of cross-section can be checked as per EN 1992-1-1.

• General columns are modeled and analyzed in midas Gen.

• General columns are checked as per EN 1992-1-1 in the new design module, midas Design +.

Tools > midas Design + Member dimensions and forces are automatically exported to midas Design +.


13 / 15

• General column reinforcement drawings are provided. The drawings can be exported in *.dwg format file.

General Column Drawings


14 / 15

• Reinforcement, concrete quantities and form area are provided in a table format. It can also be exported in MS excel

format file.

Quantity

midas Gen Pre/Post-Processing Enhancement Gen 2014 (v1.1) Release Note

15 / 15

1. Revit 2014 Interface

File > Import > midas Gen MGT File

• The latest Revit Structure 2014 is supported for the data transfer with midas Gen.

• Round trip for beams, columns, walls, slabs and mat foundations is available between Revit Structure 2014 and Gen 2014.

• Mesh size of walls, slabs, and mat foundations can now be specified by the user when exporting Revit model into *.mgt

(midas Gen text format file).

Revit Structure 2014 Gen 2014 v1.1

midas gen - cspfea

Documents