Release Date : July, 2015 Product Ver. : Gen 2015 (v2.1) · Analysis & Design Gen 2015 (v2.1) Release Note 3 / 23 midas Gen 1. Addition of Creep, Shrinkage & Elastic Modulus Database

DESIGN OF General Structures I n t e g r a t e d D e s i g n S y s t e m f o r B u i l d i n g a n d G e n e r a l S t r u c t u r e s

Release Note Release Date : July, 2015

Product Ver. : Gen 2015 (v2.1)

Enhancements

(1) Addition of Creep, Shrinkage & Elastic Modulus Database as per CEB FIP 2010

(2) User Defined Relaxation

(3) Volume Surface Ratio for Composite Section for Construction Stage

(4) Improvement in Load Sequence for Nonlinear analysis function

(5) Nonlinear Analysis considering Geometric Nonlinearity

(6) Star-Battened Section Checking as per EC3

(7) Improvement in Steel Code Checking as per EC3 Singapore NA

(8) Steel Code Checking for Plated I and I-C Combined Shape Section as per IS800:2007

(9) RC beam Torsion Design/Checking as per IS456:2000

(10) Addition of Static Wind Load, Static Seismic Load and Response Spectrum Function as per NSR-10

(11) Story Irregularity Check Table as per NSR-10

(12) RC Beam, Column and Wall Design as per NSR-10

(13) RC Design as per NSR-10 in Design+

(14) Improvement in Link between midas Gen and Design+

Analysis & Design 3

Pre & Post-Processing

(1) Improvement in Local Direction force Sum

(2) Revit 2016 Interface

(3) Improvement in Pressure Load Input Method

(4) Improvement of Wood-Armer Moment

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Analysis & Design Gen 2015 (v2.1) Release Note

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midas Gen

1. Addition of Creep, Shrinkage & Elastic Modulus Database as per CEB FIP 2010

Properties > Creep/Shrinkage

Properties > Compressive Strength

Load > Temp./Prestress > Tendon Property

• Time dependent creep, shrinkage and elastic modulus for concrete can be defined as per CEB FIP 2010. The properties are applied to construction stage

analysis and heat of hydration analysis.

• Tendon relaxation as per CEB FIP 2010 and 1990 are now available. Based on the loss rate at 1000 hours defined by the user, prestress loss due to steel

relaxation is determined.

Creep/Shrinkage Compressive Strength

Tendon Property

Creep Deformation in Construction Stage Model


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midas Gen

2. User Defined Relaxation

• Tendon relaxation function can be defined by the user and it can be applied to the tendon relaxation loss calculation. The relaxation value can be defined

as the relaxation ratio based on the initial jacking force defined in Tendon Prestress Load. For the long-term relaxation loss, the program assumes the

relaxation is constant after the final relaxation rate defined by the user. It will be very useful to apply various national standard of tendon relaxation.

• User defined relaxation can be entered by relaxation rate and hour/day relation. It can be entered by copy and paste from MS Excel or import in *.TDM

file.

Properties > User Define

Load > Temp./Prestress > Tendon Property

Tendon Property User Defined Relaxation Tendon Effective Force Graph


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midas Gen

3. Volume-surface Ratio for Composite Section for Construction Stage

• When the creep and shrinkage of concrete are defined according to ACI or PCA, the volume-surface ratio can be defined for each part. In the previous

version, there was no function to apply v/s ratio by part. Therefore identical value for each part was applied defined in Time Dependent Material >

Creep/Shrinkage or Time Dependent Material > Change Property.

Load > Construction Stage > Composite Section for C.S.

Composite Section for Construction Stage

Composite Section Properties


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midas Gen

4. Improvement in Load Sequence for Nonlinear analysis function

Analysis > Nonlinear Analysis Control

Load > Settlement/Misc. > Load Sequence for Nonlinear

• In nonlinear analysis, the sequence of applying loads can be defined in Loading Sequence for Nonlinear Analysis. In the previous version, loading sequence

was effective only when Newton-Raphson was selected as Iteration Method. In the new version, loading sequence can be used when Displacement-

Control is selected as Iteration Method.

• In one model, both Displacement-Control and Newton-Raphson iteration method can be used. It will be useful when Newton-Raphson method is used for

dead load and Displacement-Control method is used for lateral loads.

Loading Sequence in Nonlinear Analysis

Nonlinear Analysis Control


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midas Gen

5. Nonlinear Analysis considering Geometric Nonlinearity

Pushover > Pushover Global Control

Load > Dynamic Loads > Time History Analysis Data > Load case

• The geometric nonlinear effect due to large displacement can be reflected in Pushover analysis and Time history analysis.

• This option will be extremely useful for spatial structure and specialty structure for which large deformation is expected as well as high-ductility RC and

steel buildings in seismic analysis.

Pushover Global Control Time History Load Case


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midas Gen

• New section database for star-battened section has been implemented. Same DB sections as angle type are used.

• For star-battened section, steel code checking and steel optimal design as per EN1993-1-1:2005 have been implemented for compression verification. Recommended,

Sweden and Singapore national annex can be selected. Compression yielding checks and buckling checks are provided.

6. Star-Battened Section Checking as per EC3

Design > Steel Code Checking

Design > Steel Optimal Design

2-Angle Section Data Steel Code Checking


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midas Gen

Properties > Material Properties

Design > Steel Design > Modify Steel Material

7. Improvement in Steel Code Checking as per EC3 Singapore NA

• Steel material data base for Class 2 & 3 as per BC1:12, Appendix A has been implemented. Design parameter py and fy are applied in the steel code

checking by different steel grades and thickness.

Material Properties Report in Steel Code Checking


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midas Gen

• Steel I-girder with additional top plate can be generated using “I-C Combined Shape” Combined Section.

• I-C Combined Shape Section can be verified in Steel code checking as per IS800:2007.

8. Steel Code Checking for Plated I and I-C Combined Shape Section as per IS800:2007

Properties > Section Properties

Design > Steel Design > Design Code > IS:800-2007

Design/Check in midas Design +

Plate length is equal to I section flange

Plate length is less than I section flange

Plate length is larger than I section flange

I-C Combined section

Applicable Section types


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midas Gen

• In RC Code Design and Code Checking, torsion design has been newly added as per IS456:2000. The user can select the option if torsion verification is included or not in

Concrete Design Code dialog box.

9. RC beam Torsion Design/Checking as per IS456:2000

Design > RC Design > Design Code > IS456:2000

Detail Report Design Result Dialog Box


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midas Gen

• Response Spectrum Function as per NSR-10(Colombian Earthquake Resistance Building Code) has been newly implemented. By defining Site Class, Effective Peak

Acceleration/Velocity and Site Coefficient, spectrum will be automatically generated and base shear force will be applied considering structural mass. Accidental

eccentricity can be considered for both floor diaphragm and flexible floor.

• Static Seismic Load can be applied as per NSR-10. It is applied to the mass center of each floor level when floor diaphragm is considered. If floor diaphragm is not

considered, static seismic load will be applied to each node based on the mass distribution.

• Static Wind Load as per NSR-10 is available. It is applied to the dimension center when floor diaphragm is considered. If floor diaphragm is not considered, it will be applied

to the nodal position for which vertical elements are connected.

10. Addition of Static Wind Load, Static Seismic Load and Response Spectrum Function as per NSR-10

Load > Lateral Loads > Wind Loads / Static Seismic Loads

Load > Response Spectrum Analysis Data > Response Spectrum Functions

Static Wind Load Static Seismic Load Response Spectrum Load


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midas Gen

• Once Irregularity Check Parameter is specified as NSR-10, irregularity check tables are provided according to NSR standard.

• Mass Irregularity Check table is provided to check if the effective mass of any story is more than 150% of the effective mass of an adjacent story.

• Torsional Irregularity Check table is provided to check if a structure with rigid diaphragm, the maximum story drift, computed including accidental torsion evaluated with

Ax = 1.0 and measured perpendicularly to an axis is more than 1.2 and less than or equal to 1.4 times the average of the story drifts at the two ends of the structure with

respect to the same reference axis. Extreme Torsional Irregularity is displayed if the maximum story drift is more than 1.4 times the average of the story drifts at the two

ends of the structure.

11. Story Irregularity Check Table as per NSR-10

Results > Result Tables > Story > Irregularity Check Parameter

Results > Result Tables > Story > Weight Irregularity Check

Results > Result Tables > Story > Torsional Irregularity Check

Weight Irregularity Check

Torsional Irregularity Check


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midas Gen

• Stiffness Irregularity Check table is provided to check if there is a story in which the lateral stiffness is less than 70% but more than or equal to 60% of the stiffness of the

story above or less than 80% but more than or equal to 70% of the average stiffness between three stories above. “Extreme Stiffness Irregular” will be displayed where

there is a story in which the lateral stiffness is less than 60% of that in the story above or less than 70% of the average stiffness of the three stories above.

• Capacity Irregularity Check table is provided to check if the story lateral strength is less than 80% of that in the story above but more than or equal to 65%, understanding

that the story strength such as the sum of the strengths of all the elements share the story shear for the considered direction. “Extreme Capacity Irregular” will be

displayed when the story lateral strength is less than 65% of that in the story above, understanding that the story strength such as the sum of the strengths of all the

elements share the story shear for the considered direction.

Results > Result Tables > Story > Stiffness Irregularity Check (Soft Story)

Results > Result Tables > Story > Capacity Irregularity Check (Weak Story)

Stiffness Irregularity Check (Soft Story)

Capacity Irregularity Check (Weak Story)


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midas Gen

• Automatic generation of load combination for strength and service verification as per NSR-10 is provided. 100:30 rule for orthogonal effect of seismic load can be

considered.

• Special provision for seismic design is provided with DES, DMO and DMI energy dissipation level. Energy dissipation level can be defined for frame elements and wall

elements separately. After performing automatic design, summary graphic report and detailed text format report are provided.

• By performing Concrete code Design, the program will display the recommend number of rebar with its spacing. The user can manually assign rebars for beam, column,

and wall elements and verify the section capacity using concrete code checking.

12. RC Beam, Column and Wall Design as per NSR-10

Results > Load Combinations

Design > RC Design > Design Code > NSR-10

Load Combination for Concrete Design Concrete Design Results Concrete Design Code


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midas Gen

• Design+ is a collection of handy structural component design and detailing tools, which are easy to use and speed up the day to day design process. In this version, RC

design modules as per NSR-10 has been newly implemented.

13. RC Design as per NSR-10 in Design+

Tools > midas Design+

RC Design Module as per NSR-10 Design+ Frame Work

Bill of Material Table

MS Word Format Design Report

Member Drawing


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midas Gen

• In the new version of midas Design+, the user is able to update member forces and design parameters for a specific section without updating section size or rebar data

which were already modified in Design+. In the previous version, if the original midas Gen model is changed and member forces are updated, the user had to update a

section again and entire data including rebar data modified by the user in Design+ was updated. In the new version, the user can select an option if they want to update

the existing section size and rebar data or not.

14. Improvement in Link between midas Gen and Design+

Tools > midas Design+

Link to midas Gen Import a Section Modify Section Size in Design+

Update midas Gen Model Import the identical Section Again Check updated Member Force

with identical Section Size

midas Gen Pre & Post-processing Gen 2015 (v2.1) Release Note

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1. Improvement in Local Direction force Sum • Local Direction Force Sum can now consider Response Spectrum load case for Beam, Plate & Solid model. In the previous version, if beam elements are included in the

desired cross section, the program could not calculate the resultant force due to Response Spectrum load cases.

Results > Local Direction

Local Direction Force Sum Table

Local Direction Force Sum Text Output Local Direction Force Sum


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2. Revit 2016 Interface

Functions Revit <> Gen

Linear

Elements

Structural Column <>

Beam <>

Brace <>

Curved Beam >

Beam System >

Truss >

Planar

Elements

Foundation Slab <>

Structural Floor <>

Structural Wall <>

Wall Opening & Window >

Door >

Vertical or Shaft Opening >

Boundary

Offset >

Rigid Link >

Cross-Section Rotation >

End Release >

Isolated Foundation Support >

Point Boundary Condition >

Line Boundary Condition >

Wall Foundation >

Area Boundary Condition >

Load

Load Nature >

Load Case >

Load Combination >

Hosted Point Load >

Hosted Line Load >

Hosted Area Load >

Other

Parameters

Material <>

Level >

Send Model to midas Gen

Revit 2016 Gen2015

• Using Midas Link for Revit Structure, direct data transfer between midas Gen and Revit 2016 is available for Building Information Modeling (BIM) workflow. Midas Link for Revit Structure enables us to directly transfer a Revit model data to midas Gen, and deliver it back to the Revit model file. It is provided as an Add-In module in Revit Structure and midas Gen text file (*.mgt) is used for the roundtrip.

File > Import > midas Gen MGT File

File > Export > midas Gen MGT File


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3. Improvement in Pressure Load Input Method

• Although the pressure loads such as dead, live, roof and snow loads have different values, they share the common loading areas. In order to avoid laborious repetitions and expedite the loading data entry process, midas Gen distinguishes the commands for the definition of pressure loads and the application of pressure loads.

Load > Static Load > Pressure Loads > Define Pressure Load Type

Load > Static Load > Pressure Loads > Assign Pressure Load

Define Pressure Load Type Assigned Pressure Load


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• In midas Gen, Wood Armer Moment can be checked in both Results > Plate Forces/Moment and Design > Meshed Design > Flexure Design menu. In Results > Plate Forces/Moment menu, there are improvements as follows:

In the new version, Wood-Armer moment can be viewed for construction stage loads and envelope load combinations.

In the previous versions , Wood-Armer moment could only be calculated for plates parallel to the Global XY plane. This has now been improved to include plates oriented along any general plane. In order to calculate Wood-Armer moment, rebar angles must be defined in Sub-Domain dialog box.

• Rebar angles can be freely defined for the rebar Dir. 1 and Dir. 2 separately. Multiple Rebar angle can be defined through different sub-domains.

4. Improvement in Wood-Armer Moment

Result Tables > Plate > Force & Stress > Plate Force (W-A Moment)

Sub-Domain for Rebar Direction Definition Wood-Armer Moment Contour and Table


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midas Gen provides design forces in the reinforcement directions for skew

reinforcement according to the Wood-Armer formula. Analysis results provide

the plate forces, i.e. Mxx, Myy, Mxy with reference to element local axes.

The two reinforcement directions can be defined by specifying two angles,

alpha from the reference x-axis and phi as shown in the figure below.

where,

1, 2: reinforcement direction

α: angle between reference x-axis and 1-

reinforcement direction

φ: angle between 1-reinforcement direction

and 2-reinforcement direction

Firstly, internal forces (mxx, myy, and mxy) are transformed into the a-b

coordinate system.

Then, Wood-Armer moments are calculated as follows:


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This function will enable the user to define local coordinate system for selected nodes to the vertical direction of reference line. Reference line can be defined using

two points or one point with GCS axis.

This feature will be extremely useful to assign Point Spring Support to the cylindrical structure buried on the ground.

Boundary > Node Local Axis

4. Easy Alignment of Directions of Node Local Axis

Node Local Axis Dialog Box

Documents

Release Date : July, 2015 Product Ver. : Gen 2015 (v2.1) · Analysis & Design Gen 2015 (v2.1) Release Note 3 / 23 midas Gen 1. Addition of Creep, Shrinkage & Elastic Modulus Database