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midas Civil New Module: GSD
1 / 35
Civil 2011 (v1.1)Release Note
Civil 2011 (v1.1) Release NoteIntegrated Solution System for Bridge and Civil Engineering
midas Civil New Module: GSD
2 / 35
Civil 2011 (v1.1)Release Note
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
16
25
35
New Module 3
1. General Section Designer
midas Civil New Module: GSD
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Civil 2011 (v1.1)Release Note
1. General Section Designer
New module
midas Civil New Module: GSD
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Civil 2011 (v1.1)Release Note
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.
1. General Section Designer
Stress ContourWork Process
Moment- Curvature3D PM Interaction Curve
midas Civil New Module: GSD
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Civil 2011 (v1.1)Release Note
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
midas Civil New Module: GSD
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Civil 2011 (v1.1)Release Note
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.
midas Civil New Module: GSD
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Civil 2011 (v1.1)Release Note
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
midas Civil New Module: GSD
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Civil 2011 (v1.1)Release Note
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
midas Civil New Module: GSD
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Civil 2011 (v1.1)Release Note
Work Process
Step 2. Define cross-section
– Merging two shapes
– Creating hollow sections
Copy Shapes
Creating Hollow Section
Merged Shapes
Model > Shape > Merge Shape
midas Civil New Module: GSD
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Civil 2011 (v1.1)Release Note
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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Civil 2011 (v1.1)Release Note
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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Civil 2011 (v1.1)Release Note
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
midas Civil New Module: GSD
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Civil 2011 (v1.1)Release Note
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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Civil 2011 (v1.1)Release Note
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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Civil 2011 (v1.1)Release Note
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
midas Civil New Module: GSD
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Civil 2011 (v1.1)Release Note
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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Civil 2011 (v1.1)Release Note
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
midas Civil Pre/Post Processing
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Civil 2011 (v1.1)Release Note
(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.
Model > Properties > Section Manager
Reinforced Shear Input Dialog Box
Reinforcement Mode of Section Manager
XP style dialog
needed
Placement of reinforcements using Guide Line
midas Civil Pre/Post Processing
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Civil 2011 (v1.1)Release Note
(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.
Model > Properties > Section Manager
Stress Points Mode of Section Manager
Base Stress Points Additional Stress Points (for Part 2)
midas Civil Pre/Post Processing
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Civil 2011 (v1.1)Release Note
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
midas Civil Pre/Post Processing
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Civil 2011 (v1.1)Release Note
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
midas Civil Pre/Post Processing
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Civil 2011 (v1.1)Release Note
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
midas Civil Pre/Post Processing
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Civil 2011 (v1.1)Release Note
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
midas Civil Pre/Post Processing
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Civil 2011 (v1.1)Release Note
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
midas Civil Pre/Post Processing
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Civil 2011 (v1.1)Release Note
1. Moment-Curvature Calculation
2. Damping Ratios by Material Properties
3. Considering Consistent Mass in Time History Analysis
4. Improvement in Group Damping
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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Civil 2011 (v1.1)Release Note
1. Moment-Curvature Calculation
• 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
midas Civil Analysis
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Civil 2011 (v1.1)Release Note
2. Damping Ratios by Material Properties
• 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%)
midas Civil Analysis
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Civil 2011 (v1.1)Release Note
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)
midas Civil Analysis
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Civil 2011 (v1.1)Release Note
4. Improvement in Group Damping
• 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
midas Civil Analysis
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Civil 2011 (v1.1)Release Note
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
midas Civil Analysis
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Civil 2011 (v1.1)Release Note
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
midas Civil Analysis
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Civil 2011 (v1.1)Release Note
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
midas Civil Analysis
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Civil 2011 (v1.1)Release Note
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
midas Civil Analysis
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Civil 2011 (v1.1)Release Note
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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Civil 2011 (v1.1)Release Note
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
midas Civil Analysis
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Civil 2011 (v1.1)Release Note
1. Irregular Section Check as per EC2-2:06
2. MS Excel Report for Composite Plate-Girder design as per EC4
Design
midas Civil Design
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Civil 2011 (v1.1)Release Note
1. Irregular Section Check as per EC2-2:06
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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Civil 2011 (v1.1)Release Note
2. MS Excel Report for Composite Plate-Girder design as per EC4
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