civil 2011 (v2.1)release note - midas...

midasCivil Pre & Post-processing

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Civil 2011(v1.1)Release Note

Civil 2011 (v2.1)Release NoteIntegrated Solution System for Bridge and Civil Engineering


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Enhancements

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13

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Railway Bridge Analysis as per EN1991-2:2003

Straddling Special Vehicles as per EN1991-2:2003 UK NA

General Shape Composite Box Girder Check as per EN 1994-2:2005

Improvement in pushover analysis speed

Improvement in Pushover shear hinge

Auto Termination Option in the Pushover Analysis


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1. Eurocode1 train load

Rail traffic actions as per EN1991-2 :2003 can be defined in midas Civil.Rail traffic actions are simulated by the means of load models as defined in the Eurocode.Five models of railway loading which can be defined are:

• Load Model 71 (and Load Model SW/0 for continuous bridges) to represent normal rail trafficon mainline railways,

• Load Model SW/2 to represent heavy loads,• Load Model HSLM A1-A10 and HSLM B to represent the loading from passenger trains

at speeds exceeding 200 km/h (Static analysis using dynamic factor),• Load Model “Unloaded train” to represent the effect of an unloaded train.

Dynamic effect based on the condition of the track maintenance can also be considered.

Rail Traffic Load Models Dynamic factor application

Load > Moving Load Analysis Data > Vehicles

Load > Moving Load Analysis Data > Moving Load Cases

Load > Moving Load Analysis Data > Moving Load Code

Load > Moving Load Analysis Data > Railway Dynamic Factor, Railway Dynamic Factor by Element


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Step 1. Open midas Civil model file.

Step 2. Specify the Moving Load code(Load>>Moving Load Analysis Data>> Moving Load

Code) as Eurocode.

Step 3. Add a Standard vehicle.

Step 4. Select EN 1991-2:2003 Rail Traffic Load.

Step 5. Traffic Load models can be defined as required.

Procedure for defining the Rail traffic load models

Select Eurocode Add a Standard vehicle

Select the Traffic Load Standard name and Select the required load model.




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Procedure for defining the load case for rail traffic load

Step 1. After defining the rail traffic load vehicle, select a Railway Bridge Load model inLoad>> Moving Load Analysis Data>> Define Moving Load case.

Step 2. Define the Psi factors if required and Add a Sub-Load case with the required loading effect for the rail traffic vehicle.

Step 3. In the sub-load case dialog box, select the previously defined vehicle.Step 4. Specify the Min and Max Number of Loaded Lanes and select the lanes from the

Assignment Lanes list.Step 5. Press OK to complete the load case definition.

Moving Load case for rail traffic load



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Procedure for defining the Dynamic Factor

Step 1. Dynamic factor can be applied through Load>>Moving Load analysis Data>>Dynamic

factor.

Step 2. Select the elements on which the dynamic factor has to be applied.

Step 3. The Dynamic factor can be input either manually or Automatically by the program.

If Auto Input is selected, determinant length along with the quality of track

maintenance should be defined. A reduction in dynamic factor due to the cover

thickness can also be considered.

Step 4. The dynamic factors calculated can be checked or modified in the table format using

Load>>Moving Load analysis Data>>Dynamic factor table.

Dynamic factor

Dynamic factor Table

Load > Moving Load Analysis Data > Railway Dynamic Factor, Railway Dynamic Factor by Element

Load > Moving Load Analysis Data > Railway Dynamic Factor by Element Table


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2. Load Model 3 (Straddling Special Vehicles) as per UK NA to Eurocode 1

Special vehicles (SV/SOV)

midas Civil can now also simulate the vehicles which can straddle between two lanes. These newly added straddling vehicles are as per UK National Annex and include :• Load Model 3 (SV 80)• Load Model 3 (SV 100)• Load Model 3 (SV 196)• Load Model 3 (SOV 250)• Load Model 3 (SOV 350)• Load Model 3 (SOV 450)• Load Model 3 (SOV 600).





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Procedure for defining the load case using Straddling vehicles

Step 1. Add a Standard Load case after defining LM1 and LM3 special straddling vehicles.

Step 2. Select the LM1 & Special Multi load model.

Step 3. Select the LM1 and LM3 vehicle in the Load Case Data.

Step 4. Select any two lanes from the Selected Lanes list and press button to specify them

as Straddling Lanes. Remaining area can also be considered.

Moving load case for LM1 & Special Multi

Vehicle definition

The behavior of the bridge on application of the straddling vehicle can be seen by making a

load combination of Load Model 1 and straddling Load Model 3 vehicles. For the definition

of such a load combination follow the steps described below. The load combination will

automatically consider the placement of the straddling vehicle on two lanes considering the

worst effect on the bridge. This load combination will also take into account the

longitudinal placement of the Load Model3 vehicle with a prescribed spacing as per the UK

National Annex.




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3. General Shape of Composite Steel Girder Check as per EN 1994-2:2005

• Code check can be performed for any shape of composite section.

• The following checks as per the Ultimate Limit State can be applied:

• Bending Resistance with the classification of cross-section

• Resistance to Vertical Shear considering buckling resistance

• Resistance to Longitudinal Shear

• The following checks as per Service Limit State can be applied:

• Stress limitation (Concrete, Reinforcement, Structural steel)

• Longitudinal shear force per connector

• Sections imported from SPC are supported.

• Longitudinal rebars can be assigned to the composite sections.

• Transverse and longitudinal stiffeners can be assigned and used for code check.

• Due consideration is given to class determination as per Eurocode.

• Design Report can be obtained in the table format or Excel format.

Table For Vertical Shear Resistance Check

Design > Composite Steel Girder Design


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• Reinforcement can be provided either as line type, point or poly-line type.

• Top Flange, Bottom Flange and Web can be categorized as Internal and outstand members as required by Eurocode.

• Transverse Stiffeners can be provided.

• Transverse Stiffeners at end supports can be assigned as either Rigid End Post, Non Rigid End Post or No End Post.

• Different Transverse Stiffeners can be provided to different supports.

Design > Composite Steel Girder Design > Longitudinal Reinforcement

Definition of Reinforcement

Design > Composite Steel Girder Design > Transverse Stiffener at End Support & Transverse Stiffener

Definition of Transverse Stiffener of End Support

Definition of Transverse Stiffener


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• Tabular Results for different checks such as Bending Resistance, Shear Resistance and Stresses can be obtained.

• Excel Report can be generated.

Design > Composite Steel Girder Design > Design Result Tables >Bending Resistance

Result Table for Bending Resistance Check

Design > Composite Steel Girder Design > Design Result Tables >Resistance to Longitudinal Shear

Result Table for Longitudinal Shear Check

Detailed Report in Excel Format


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4. Improvement in pushover analysis speed

Design > Pushover Analysis > Perform Pushover Analysis

ANALYSIS MODEL

ANALYSIS RESULT

[Civil V790] PUSHOVER [Civil V791] PUSHOVER

▣ BEAM : 1,550 ELEMENT

ANALYSIS TIME

ProgramTotal Analysis Time (sec) : 1,550 elem.

20 step 50 step 100 step 200 step

Civil 2011 (v1.1) 14.72sec 95.35sec 446.02sec 1443.00sec

Civil 2011 (v2.1) 9.30sec 20.28sec 36.76sec 71.93sec

Impr. Rate 63.17% 20.97% 8.24% 4.98%

Pushover analysis speed has been significantly improved by enhancing the analysis algorithm and output process.


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5. Improvement in Pushover shear hinge

• Axial, shear and trosion hinges (Fx, Fy, Fz, and Mx) can now be assigned to i-end and j-end

of a member separately. In the old version, they were assigned to the center of the

member.

• It is applicable to RC, Steel and SRC members. For masonry material, axial, shear, and

torsion hinges are assigned to the center of the member.

Design > Pushover Analysis > Define Pushover Hinge Properties

[Civil V790] PUSHOVER [Civil V791] PUSHOVER


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6. Auto Termination Option in the Pushover Analysis

• When axial hinge of beam/column, wall or truss element yields, the pushover analysis can

be automatically terminated with displaying a warning message.

• When the analysis is terminated due to yielding of axial hinge, analysis results can be

examined up to the last pushover step.

Design > Pushover Analysis > Pushover Global Control

midas Civil New Module: GSD

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Civil 2011 (v1.1)Release Note

Integrated Solution System for Bridge and Civil Engineering


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Enhancements

Pre/Post Processing

1. Section Manager

2. Improvement in Beam Detail Analysis

3. Tendon DXF Export

and much more …

Analysis

1. Moment-Curvature Calculation

2. Damping Ratios by Material Properties

3. Considering Consistent Mass in Time History Analysis

4. Improvement in Group Damping

And much more…

Design

1. Irregular Section Check as per EC2-2:06

2. MS Excel Report for Composite Plate-Girder design as per EC4

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New Module 3

1. General Section Designer


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New module


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General Section Check or GSD is a new module added to midas Civil.

Scope of GSD: Definition of any irregular cross-section

Calculation of section properties

Generation of P-M, P-My-Mz, M-M interaction curves

Calculation of Section Capacity (in flexure) and Safety Ratio based on member forces

Generation of Moment-Curvature curve

Plot of stress contours for all the cross-sections

All the above features are supported for: RC sections, Steel sections and Composite sections.


Stress ContourWork Process

Moment- Curvature3D PM Interaction Curve


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User Interface

• GSD can be called from midas Civil by Tools > General Section Designer.

• In one model file, more than one section can be created and saved under different names.

• All the sections are listed in the Works Tree.

• Double click the section name in the Works Tree to show the section in the section view.

Toolbar

Coordinates

Main menu Works Tree

Message Window Unit ControlTable Window

Section View


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Work Process

Step 1. Define material

• Materials : RC or Steel

• Applied Codes: Eurocode, UNI, British Standard, ASTM, Indian Standard, etc.

• Nonlinear material properties can also be assigned to concrete, structural steel and rebar

materials.


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Work Process

Step 1. Define material

• Nonlinear Material Properties

Kent & Park ModelParabolic Stress-strain Curve

Asymmetrical Bi-linear CurveMenegotto-Pinto Model

• Concrete nonlinear properties

• Steel nonlinear properties


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Work Process

Step 2. Define cross-section

– Basic shape section by selecting a section from the DB of the standard sections for a

country

– Any irregular cross-section by specifying the shape in the Section View or entering

coordinates into a table

General type shape

Model > Shape > Basic Shape


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Work Process

Step 2. Define cross-section

– Merging two shapes

– Creating hollow sections

Copy Shapes

Creating Hollow Section

Merged Shapes

Model > Shape > Merge Shape


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Work Process

Step 3.1 Select Rebar Material

• The following stress-strain curves can be assigned to rebars:

– Elastic-Only

– Bilinear Model

– Menegotto-Pinto Model

– Park Strain Hardening

Menegotto-Pinto ModelPark Strain Hardening

Model > Rebar > Rebar Material

Bilinear Model


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Work Process

Step 3.2 Add Rebars: Various patterns are available for assigning the rebars to a section.

– Point pattern : Add rebar at a single point.

– Line Pattern : Add rebars in a line.

– Arc Pattern : Add rebars in circular arc patterns.

– Rectangular Pattern : Add rebars in a rectangular pattern.

– Perimeter Pattern : Add rebars around the outer perimeter of the section by

specifying the concrete cover and number of rebars.

Model > Rebar > Rebar-Point Pattern…


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Work Process

Step 4. Define Load Combinations and member forces

Sign Convention:

• Clockwise moment about the y and z axes are taken as positive. Counter-clockwise

moments are taken as negative. P is taken as positive towards ‘+z’ axis.

Step 5. Cross-section Properties:

• Apart from general section properties, Principal Properties, Section Modulus & Plastic

properties are also calculated.

Model > Define Load Combination

Model > Section Property


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Work Process

Step 6.1 Check Results: Interaction Curves

Result > Interaction curve

P-M interaction curve for a specified angle

P-M interaction curve for a Load Combination


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Work Process

Step 6.1 Check Results: Interaction Curves

Result > Interaction curve

M-M interaction curve for a Load combination

3 D interaction surface showing all the load combination


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Work Process

Step 6.2 Check Results: Moment-curvature curve

Step 6.3 Check Result: Stress Contour

Result > Moment Curvature Curve

Moment-curvature curve

Stress contours

Move mouse pointer on

the curve to see the

strain diagram at a

particular point.

Result > Stress Contour


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1. Section Manager

2. Improvement in Beam Detail Analysis

3. Tendon DXF Export

4. Improvement in Tendon Profile Generator

5. Addition of Header and Footer in Dynamic Report Generator

6. Improvement in Traffic line-lane and surface-lane display

Pre & Post-processing

midas Civil Pre/Post Processing

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1. Section Manager

(1) Stiffness

• For various types of sections (DB, PSC, Tapered Section, Composite Section, General and

Composite General Section), transformed section properties can be calculated reflecting

tendons and reinforcement.

• Transformed section properties can be calculated at various locations of a section (1/4 , 2/4

, 3/4) and the placement of Tendon/Reinforcement can be viewed.

• Existing functions ‘Section Stiffness Scale Factor’ and ‘Cross Section Viewer’ have been

integrated.

Model > Properties > Section Manager

Stiffness Mode of Section Manager

Check the transformed section properties with Reinforcement and Tendon reflected


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(2) Reinforcement Input

• Input of Longitudinal Reinforcement becomes more convenient (Point/Line/Arc/Circle/Poly

Line Type are available for Grid input).

• Input of Reinforced Shear becomes more convenient.


Reinforced Shear Input Dialog Box

Reinforcement Mode of Section Manager

XP style dialog needed

Placement of reinforcements using Guide Line


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(3) Definition of Stress Points

• It is now possible to define arbitrary stress points for various types of sections (DB, PSC /

PSC Value, Tapered Section, Composite Section, General / Composite General Section).

• Part 2 of the composite section can now be defined with stress points.


Stress Points Mode of Section Manager

Base Stress Points Additional Stress Points (for Part 2)


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2.Improvement in Beam Detail Analysis

• Stress calculations at any points are now available for more section types (DB, PSC, Tapered

Section, Composite Section, General and Composite General Section).

• Added stress points can be produced in an Excel report.

Results > Beam Detail Analysis

Check Additional Stress using Beam Detail Analysis

Excel report about Additional Stress


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3. Tendon DXF export

• Tendon Profiles can be exported to DXF in a 2D format (XZ Plane , XY Plane).

Load > Prestress Loads > Tendon Profile

Tendon exported as a DXF File

Tendon placement in a FCM bridge


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4. Improvement in Tendon Profile Generator

• Tendon profiles imported from DXF can be placed in one go, using Origin Point.

• Various CAD Line Types can be imported.

Tools > Tendon Profile Generator

Imported Tendon Profiles

Tendon Profile Generator Input Dialog Box


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1. Fill out the Project Information in the File tab.

2. Open the Dynamic Report and double-click Header and Footer in the Report Tree.

3. Select the items to add or remove in the header or footer field by clicking arrow buttons.

4. Use up and down arrows to arrange the order of header and footer items.

5. Click OK to confirm.

5. Addition of Header and Footer in Dynamic Report Generator

In the dynamic report, we can add the project information in the header and footer of MS

Word. Project Information includes Project Name, Revision, User Name, E-mail, Address,

Telephone, Fax, Client, Title, File Name, Created, Directory, Modified, and File Size.

Procedure of Header and Footer Generation

Tools > Dynamic Report Generator


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8. Improvement in Traffic Line-lane and Surface-lane display

• After displaying the traffic surface lanes, it took long time to change the display of model

view. Now, once the traffic surface lanes have been displayed, the view can be changed

instantly.

• After a first display of the traffic surface lanes, the lanes can be displayed instantly from

the second time of displaying.

• Each lane can be displayed separately.

Display all the lanes at a time

Display one lane at a time


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3. Considering Consistent Mass in Time History Analysis


5. Considering Static Load Case for the Initial Loading in Time

History Analysis

6. Considering the Construction Stage Load for Initial Loading in

Pushover Analysis

7. Option for cumulating reactions and displacements due to initial

loads in Pushover Analysis

8. Considering Boundary Change Assignment Function in Pushover

Analysis

9. Option for Considering the Shear Failure in Pushover Analysis

10.Addition of Ramberg-Osgood and Hardin-Drnevich Models in

Inelastic Hinge Properties

Analysis

midas Civil Analysis

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• Moment-Curvature Curve calculation function has been added, which is one way of

evaluating the section capacity when evaluating the earthquake resistance for existing

bridges.

• Through the simple input of hysteresis curves of various materials, the section capacity can

be calculated quickly.

Model > Properties > Moment-Curvature Curve

Hysteresis curves of Concrete and Steel

Produce the report

Moment-Curvature Curve

Moment-Curvature Curve input dialog box

Produce the

results

Assign the

hysteresis

property


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• An option considering different damping ratios for different materials has been added in

the Material Data for time history analysis and response spectrum analysis.

• In order to apply the damping ratio specified in the Material Data, following damping

method needs to be selected in the Time History Load Cases.

Response Spectrum Analysis : Strain Energy Proportional

Time History Analysis: Element Mass & Stiffness Proportional or Strain Energy Damping

Model > Properties > Material > Add > Damping Ratio

Load > Time History Analysis Data > Time History Load Cases

Default value of damping ratio by material types

- Steel : 0.02 (2%)- Concrete / SRC : 0.05 (5%)- USER : 0.00 (0%)


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3. Considering Consistent Mass in History Analysis

• Now Consistent Mass and Off-diagonal Masses option of Lumped Mass can be

considered during the linear and nonlinear time history analysis. In the previous

versions, only ‘Lumped Mass’ could be applied in the time history analysis when ‘Off-

diagonal Masses’ option is checked on.

• If the Consistent Mass or Off-diagonal Mass option is used, Lanczos method must be

selected when performing Eigenvalue Analysis.

Model > Structure Type

Consistent Mass

Mass Offset (Off-diagonal Masses)


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• Group Damping dialog box has been divided into ‘Element Mass & Stiffness

Proportional…’ and ‘Strain Energy Proportional…’.

• Now Mass Coefficient (alpha) can be considered. Coefficients for mass and stiffness

(alpha and beta) are automatically calculated.

Model > Properties > Group Damping : Element Mass & Stiffness Proportional

Model > Properties > Group Damping : Strain Energy Proportional

Element Mass & Stiffness Proportional

Strain Energy Proportional


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5. Considering Static Load Case for the Initial Loading in Time History Analysis

• Now Static Analysis Result ‘Import (ST)’ can be considered as an initial load.

• In the previous versions, the axial force due to ‘ST’ initial load was not reflected when

determining the yielding of a hinge. In the new version, the axial force due to ‘ST’ initial

load is reflected when calculating the yield strength of moment component.

• When ‘Increment Method>Load Control’ is used, ‘Time History Load Cases>Scale Factor’

is now reflected.

Load > Time History Analysis Data > Time History Load Cases


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6. Considering the Construction Stage Load for Initial Loading in Pushover Analysis

• Final stage member forces from construction stage analysis can be used as initial loads

for the pushover analysis.

Pushover Analysis > Pushover Analysis Control


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7. Option for cumulating reactions and displacements due to initial loads in Pushover Analysis

• In the previous versions, reactions due to initial loads were cumulative whereas

displacements due to initial loads were not cumulative.

• Now the user can choose whether to cumulate reactions/displacements due to initial

loads or not.

Design > Pushover Analysis > Pushover Analysis > Pushover Load Cases

• When the initial load filed is displayed as

‘Import ST/CS Result’, this option is not

available.

Note that the results from the new version

may not be the same as that from the

previous versions of midas Civil because

of this option.

• In the previous versions, the results due to

initial loads were

For Reaction/Story shear: cumulative

For Displacement: not cumulative


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8. Considering Boundary Change Assignment Function in Pushover Analysis

• This function can be applied to the following condition:

- When the boundary condition of the initial loading is different from that of the pushover loading

- When the section stiffness scale factor assigned for the initial loading is different from that of the

pushover loading

Analysis > Boundary Change Assignment to Load Cases/Analyses


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9. Option for Considering the Shear Failure in Pushover Analysis

• New option for considering the shear component failure has been added. When the option is

selected, the analysis will automatically terminate if the shear hinge occurs in the selected

member type.

Design > Pushover Analysis > Pushover Global Control


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10. Addition of Ramberg-Osgood and Hardin-Drnevich Models in Inelastic Hinge Properties

• Two material models have been added to the Inelastic Hinge Properties (Ramberg-

Osgood, Hardin-Drnevich)

• It can be applied for the inelastic time history analysis of the soil.

Model > Properties > Inelastic Hinge Properties

Ramberg-Osgood, Hardin-Drnevich

Hysteresis Curve


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Design

midas Civil Design

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Design > Concrete Design > Column General Section Data for Checking

Graphic design report 3D interaction surface

Assign rebar to irregular section

• Any column with an irregular section can be checked as per EUROCODE2-2: 06 at Ultimate Limit State for moment and shear.

• Sections imported from AutoCAD or SPC can be checked.

• Point, linear, and circular type rebars can be assigned to the irregular section.

Design > Concrete Design > Concrete Code Check > Column Checking

midas Civil Design

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Design > Composite Plate Girder Design > Position for Design Output

Detailed design report

Select Position for Design Output

• Detailed report in MS Excel format can be generated after Composite Plate-Girder design is performed as per EC4.

Design > Composite Plate Girder Design > Print Result

midas Civil Pre & Post-processing

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Integrated Solution System for Bridge and Civil Engineering


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Enhancements

Pre/Post Processing

1. Dynamic Report Generation

2. Addition of Concurrent Reaction for BD37-01 Vehicle Load

3. Pressure Type of Beam Loads

4. Improved Eccentricity Option in the Element Beam Load and Line Beam Load

5. Improved India Standard section DB

Analysis

1. Mander Model in Inelastic Material Properties

2. Improved MINEGOTTO-PINTO Steel Model

3. Improved Pushover Analysis Result

Design

1. Addition of EUROCODE PSC Design

3

10

13


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• Word format report can automatically be generated for selected input & output data (figures, tables, graphs, and text).

• Using “Dynamic Report Regenerator” function, changes of a model file are automatically updated in the report.

• User defined report format can be used and saved.

1. Dynamic Report Generation

Drag & Drop

Tools > Dynamic Report Generator

Tools > Dynamic Report Image

Tools > Dynamic Report Auto Generation


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Step 1. Open midas Civil model file.

Step 2. Register contents(image, table, chart, summary…) to enter them in the report.

Registered contents are displayed in the Report Tree.

Step 3. Open a new report.

Step 4. Enter the contents by Drag & Drop from report tree.

Step 5. Modify the report file if required.

Procedure for Dynamic Report Generation

Register a image

Insert contents by Drag & Drop

Open a new report

Register a table

Report Tree


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Procedure for Auto Regeneration

Open the pre-generated report

Modify a model file if required

Regeneration

Check the updated contents

If there are any changes in the model file, we can automatically update the pre-generated

report.

Step 1. Modify a model file if required.

Step 2. Open the pre-generated report.

Step 3. Re-generate the report.

Step 4. Check the updated contents


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2. Addition of Concurrent Reaction for BD37-01 Vehicle Load

• “Concurrent Reactions” can now be calculated for BD37-01 Vehicle load.

• Generally, the reactions or member forces calculated due to moving load analysis are the

Max/Min values for each reaction values (ex. FX, FY, ... etc.). However, for the support nodes

included in the Concurrent Reaction Group, the concurrent reactions are calculated.

Result > Result table > Concurrent (Max/Min) Reaction

BD37-01 VehicleConcurrent Reaction Group

Concurrent Reaction Result Table


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3. Pressure Type of Beam Loads

• “Uniform Pressure” and “Trapezoidal Pressure” type of Line Beam Loads and Element

Beam Loads have been implemented to consider the width of beam elements when

entering wind loads.

• This feature is useful to assign wind loads to the tapered girders (ex. longitudinal girders in

bridges).

Additional H to consider the additional height of the structures

which was not included in the modeling (ex. guard fence)

Assign a beam load as a pressure load considering the beam width

Loads > Element Beam Loads

Loads > Line Beam Loads

Uniform Pressure type Trapezoidal Pressure type


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4. Improved Eccentricity Option in the Element Beam Load and Line Beam Load

• Eccentricity can be entered by the following 2 methods: 1) from the centroid, and 2) from

the offset point.

• In the previous version, the eccentricity was entered only from the centroid. In case of the

tapered section, beam loads with eccentricity can be easily entered from the offset point.

Loads > Element Beam Loads

Loads > Line Beam Loads

Enter the eccentricity from Offset (nodal position)

for the tapered sections

Two methods to enter the eccentricity


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5. Improved India Standard section DB

• New sections (Box, Pipe, and Angle) have been implemented in IS, IS1161, and IS808

section DB.

Model > Properties > Section

Box Section SHS

Pipe Section NB

Box Section RHS

Angle Section Data


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1. Mander Model in Inelastic Material Properties

• Mander Model has been added to model the behavior of concrete confined with steel

stirrups.

• The menu name, Fiber Material Properties, has been changed to Inelastic Material

Properties.

Model > Properties > Inelastic Material Properties


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• In MINEGOTTO-PINTO steel model, the equation for calculating the plastic strain, , has

been changed in order to enhance the convergence performance.

max 01

0

0 min2

0

0 ;

0 ;

r

r

max 01

0 min2

0 ;

0 ;

y

y

Previous version New version

2. Improved MINEGOTTO-PINTO Steel Model


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• Pushover analysis results have been graphically improved in order to prevent the

user’s confusion.

• In FEMA and Eurocode type hinge, the hinge status of “C” point and “D” point is now

displayed separately. In the previous version, the hinge status of “C,D” was displayed

after the C point.

Result > Deformations > Deformed Shape

Design > Pushover Analysis > Pushover Hinge Status Result

Design > Pushover Analysis > Pushover Hinge Result Table > Beam Summary

Previous version New version

Beam Summary Table

Pushover Hinge Status Result

Previous version

New version

3. Improved Pushover Analysis Result

midas Civil Design

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1. Addition of EUROCODE PSC Design

Design > PSC Design > PSC Design

Prestressed box girder design as per EUROCODE 2-2:05 has been added.

The following limit states are verified:

• Ultimate Bending Resistance – Clause 6.1• Shear Resistance – Clause 6.2• Torsional Resistance – Clause 6.3• Crack Width Calculation and Control – Clause 7.3• Stress Limitations for Pre stressing Tendons – Clause 7.2• Stress limits for concrete at service and Construction Stages – Clause 7.2• Principal stresses for pre stressing Steels – Clause 7.1

Graphical results, tabular output, and design reports are provided in Microsoft Excel format.

Load combination to Eurocode has also been added.

Exposure class for Top and Bottom surfaces.

Design Report in Excel Format

Design Results in Tabular Format

Stress Diagram

civil 2011 (v2.1)release note - midas...

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