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8/11/2019 Optimize MIDAS
http://slidepdf.com/reader/full/optimize-midas 1/31
Bridging Your Innovat ions to Real i t ies
midas CivilOptimize Detailed Design of PT B
ox Girder
Using a Common Platform
8/11/2019 Optimize MIDAS
http://slidepdf.com/reader/full/optimize-midas 2/31
midas CivilBridging Your Innovations to Realities
PSC Box Girder
Conventional PT Box Girder Design Process
2
Preliminary Design
Static, Moving Load Analysis
Seismic Analysis
Detailed Design
Constructability Check
Pier Design (PMM Curve), Foundation, SSI
8/11/2019 Optimize MIDAS
http://slidepdf.com/reader/full/optimize-midas 3/31
midas CivilBridging Your Innovations to Realities
PSC Box Girder
Preliminary Design
Static, Moving Load Analysis
Seismic Analysis
Detailed Design
Constructability Check
Pier Design (PMM Curve), Foundation, SSI
Conventional PT Box Girder Design Process
3
Software C/D
Software A
Software B
8/11/2019 Optimize MIDAS
http://slidepdf.com/reader/full/optimize-midas 4/31
midas CivilBridging Your Innovations to Realities
PSC Box Girder
Conventional PT Box Girder Design Process
4
Consequences of Using Multiple Platform :
Longer time in Project Completion
Different Model files for Different Software for Different Phases More Manpower
In efficiency in Design, Higher Conservatism
8/11/2019 Optimize MIDAS
http://slidepdf.com/reader/full/optimize-midas 5/31
midas CivilBridging Your Innovations to Realities
PSC Box Girder
Conventional PT Box Girder Design Process
5
Consequences of Using Multiple Platform :
Longer time in Project Completion
Different Model files for Different Software for Different Phases More Manpower
In efficiency in Design, Higher Conservatism
Lesser Projects
in More Time
Lesser Degree of
CompetencyMonetary Effects
Repetition of
Work
8/11/2019 Optimize MIDAS
http://slidepdf.com/reader/full/optimize-midas 6/31
midas CivilBridging Your Innovations to Realities
PSC Box Girder
Conventional PT Box Girder Design Process
6
How Would it feel like to do everything in one Software,
at the same platform?
8/11/2019 Optimize MIDAS
http://slidepdf.com/reader/full/optimize-midas 7/31
midas CivilBridging Your Innovations to Realities
PSC Box Girder
Preliminary Design
Static, Moving Load Analysis
Seismic Analysis
Detailed Design
Constructability Check
Pier Design (PMM Curve), Foundation, SSI
Conventional PT Box Girder Design Process
7
1 Software
8/11/2019 Optimize MIDAS
http://slidepdf.com/reader/full/optimize-midas 8/31
midas CivilBridging Your Innovations to Realities
PSC Box Girder
Conventional PT Box Girder Design Process
8
What would be the benefits?
Same Model File for different Analysis
Perform Static, Moving and Dynamic Analysis at one platform Capture SSI for Design requirements
Construction Stage Analysis
Design Check/Constructability Check with AASHTO LRFD’12
Higher Degree of Precision, More optimized Design
8/11/2019 Optimize MIDAS
http://slidepdf.com/reader/full/optimize-midas 9/31
midas CivilBridging Your Innovations to Realities
PSC Box Girder
What would be the benefits?
Same Model File for different Analysis
Perform Static, Moving and Dynamic Analysis at one platform Capture SSI for Design requirements
Construction Stage Analysis
Design Check/Constructability Check with AASHTO LRFD’12
Higher Degree of Precision, More optimized Design
Conventional PT Box Girder Design Process
9
More Projects
in Lesser Time
Higher Degree
of CompetencyMonetary Effects
No Repetition
of Work
8/11/2019 Optimize MIDAS
http://slidepdf.com/reader/full/optimize-midas 10/31
midas CivilBridging Your Innovations to Realities
PSC Box Girder
Conventional PT Box Girder Design Process
10
Additional Benefits?
Generate Model Automatically with Several Auto Bridge Tools
Better Graphical User Interface Improved Graphics with CAD effects
Detailed Stress Check, Pier Crack Analysis, Fiber Model
8/11/2019 Optimize MIDAS
http://slidepdf.com/reader/full/optimize-midas 11/31
midas CivilBridging Your Innovations to Realities
PSC Box Girder
Design Optimization
Static / Moving Load
Design Check
Modify Design
Design Optimization
Problem Statement
Bridge Type : Post Tensioned Box Girder
Number of Spans : 3 (Continuous)
Span Length : 180’
Moving Load : AASHTO LRFD
Construction Type : Span by Span
11
Problem Statement
Preliminary Statement
SSI / SeismicAnalysis / Constructability Check
Detailed Design
Pier Design
8/11/2019 Optimize MIDAS
http://slidepdf.com/reader/full/optimize-midas 12/31
midas CivilBridging Your Innovations to Realities
PSC Box Girder
Design Optimization
Preliminary Design
Steps (in Midas Civil) :
Define the Material Properties
Use the Proper Auto Generate Wizard
Specify the parameters for the Span and Section
12
Design Optimization
Static / Moving Load
Design Check
Modify Design
Problem Statement
Preliminary Statement
SSI / SeismicAnalysis / Constructability Check
Detailed Design
Pier Design
8/11/2019 Optimize MIDAS
http://slidepdf.com/reader/full/optimize-midas 13/31
midas CivilBridging Your Innovations to Realities
PSC Box Girder
Design Optimization
Step 1 : Static/Moving Load Analysis
Check the Model Data Generated :
1. Self weight is already defined by the model
2. Tendon Profiles have been defined
Define the Following :
1. Additional Dead Load
2. Define Rebars in the Section3. Moving Load Data as per AASHTO LRFD
13
Design Optimization
Static / Moving Load
Design Check
Modify Design
Problem Statement
Preliminary Statement
SSI / SeismicAnalysis / Constructability Check
Detailed Design
Pier Design
8/11/2019 Optimize MIDAS
http://slidepdf.com/reader/full/optimize-midas 14/31
midas CivilBridging Your Innovations to Realities
PSC Box Girder
Design Optimization
Step 2 : Design Check
Define the Load Combinations for Design
1. Select the Auto Load Combination for AASHTO 122. Manual Definition Supported
3. Check the Strength and Service Limit States
Define AASHTO LRFD’12 Parameters for Design
1. Define Material for Design
2. Perform Design3. Check the Design results
14
Design Optimization
Static / Moving Load
Design Check
Modify Design
Problem Statement
Preliminary Statement
SSI / SeismicAnalysis / Constructability Check
Detailed Design
Pier Design
8/11/2019 Optimize MIDAS
http://slidepdf.com/reader/full/optimize-midas 15/31
midas CivilBridging Your Innovations to Realities
PSC Box Girder
Design Optimization
Step 3 : Modify Cross Section /
Tendon Placement
Based on the Design results either of the
following can be altered for a optimized design
1. Dimensions of the Box Girder
2. Tendon Location/Number
Iteration 1 : Modify the Cross Section:reducing the depth
15
Design Optimization
Static / Moving Load
Design Check
Modify Design
Problem Statement
Preliminary Statement
SSI / SeismicAnalysis / Constructability Check
Detailed Design
Pier Design
8/11/2019 Optimize MIDAS
http://slidepdf.com/reader/full/optimize-midas 16/31
midas CivilBridging Your Innovations to Realities
PSC Box Girder
Design Optimization
Iteration 1
Step 1 : Perform the Static Load / Moving Load Analysis
Step 2 : Perform the Design Check for AASHTO LRFD 12
Step 3 : Modify the Design based on the design results
Iteration 2 : Modify the Tendon Location / Number
16
Design Optimization
Static / Moving Load
Design Check
Modify Design
Problem Statement
Preliminary Statement
SSI / SeismicAnalysis / Constructability Check
Detailed Design
Pier Design
8/11/2019 Optimize MIDAS
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midas CivilBridging Your Innovations to Realities
PSC Box Girder
Iteration 2
Step 1 : Perform the Static Load/Moving Load Analysis
Step 2 : Perform the Design Check for AASHTO LRFD 12
Step 3 : Check and See if Design is best optimized
**More Iterations can be performed
Design Optimization
17
Design Optimization
Static / Moving Load
Design Check
Modify Design
Problem Statement
Preliminary Statement
SSI / SeismicAnalysis / Constructability Check
Detailed Design
Pier Design
8/11/2019 Optimize MIDAS
http://slidepdf.com/reader/full/optimize-midas 18/31
midas CivilBridging Your Innovations to Realities
PSC Box Girder
Design Optimization
18
Design Optimization
Static / Moving Load
Design Check
Modify Design
Problem Statement
Preliminary Statement
SSI / SeismicAnalysis / Constructability Check
Detailed Design
Pier Design
Benefits?
Auto Model Generation :
Acts as Design Guide to the Engineer
Quick and Error Free Modeling
Auto Tendon Definition
Easy Model Modification :
Less Time in Changing the model
Save Time
Finish More Projects in Lesser Time
Built in Design Check :
One Model File for Analysis/Design
8/11/2019 Optimize MIDAS
http://slidepdf.com/reader/full/optimize-midas 20/31
midas CivilBridging Your Innovations to Realities
PSC Box Girder
Design Optimization
20
Design Optimization
Static / Moving Load
Design Check
Modify Design
Problem Statement
Preliminary Statement
SSI / SeismicAnalysis / Constructability Check
Detailed Design
Pier Design
Soil Structure Interaction is Mandatory :
1. Static Load Distribution might change2. Settlement effects may be there
3. Better visualization of Load Transfer Mechanism
4. Forces for Foundation Design
8/11/2019 Optimize MIDAS
http://slidepdf.com/reader/full/optimize-midas 21/31
midas CivilBridging Your Innovations to Realities
PSC Box Girder
Design Optimization
21
Design Optimization
Static / Moving Load
Design Check
Modify Design
Problem Statement
Preliminary Statement
SSI / SeismicAnalysis / Constructability Check
Detailed Design
Pier Design
Soil Structure Interaction is Easy :
1. Model the foundation2. Enter the Soil Parameters, midas Civil
will Auto Generate the Soil Support
C
8/11/2019 Optimize MIDAS
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midas CivilBridging Your Innovations to Realities
PSC Box Girder
Design Optimization
22
Design Optimization
Static / Moving Load
Design Check
Modify Design
Problem Statement
Preliminary Statement
SSI / SeismicAnalysis / Constructability Check
Detailed Design
Pier Design
Model the foundation
id Ci il
8/11/2019 Optimize MIDAS
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midas CivilBridging Your Innovations to Realities
PSC Box Girder
Design Optimization
23
Design Optimization
Static / Moving Load
Design Check
Modify Design
Problem Statement
Preliminary Statement
SSI / SeismicAnalysis / Constructability Check
Detailed Design
Pier Design
Modeling Foundation is Too Tedious?
1. Approximate Foundation with the SpringSupport, obtained from the Geotechnical
Engineer.
2. Use Auto Settlement Analysis Feature to
Check the Settlement effect
id Ci il
8/11/2019 Optimize MIDAS
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midas CivilBridging Your Innovations to Realities
PSC Box Girder
Seismic Analysis
Structure
/ActionStatic Dynamic
Elastic Equivalent
Force Method
Response
Spectrum
Non-linear PushoverNon Linear Time
History
Seismic Analysis Supported
Response Spectrum Analysis Pushover Analysis
Time History Analysis
24
Design Optimization
Static / Moving Load
Design Check
Modify Design
Problem Statement
Preliminary Statement
SSI / SeismicAnalysis / Constructability Check
Detailed Design
Pier Design
id Ci il
8/11/2019 Optimize MIDAS
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midas CivilBridging Your Innovations to Realities
PSC Box Girder
Seismic Analysis
Perform the Seismic Analysis with Foundation
and Super Structure at the same time.
Simulate earthquake motion
Auto Define response spectrum
50 past earthquake database
25
Design Optimization
Static / Moving Load
Design Check
Modify Design
Problem Statement
Preliminary Statement
SSI / SeismicAnalysis / Constructability Check
Detailed Design
Pier Design
id Ci il
8/11/2019 Optimize MIDAS
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midas CivilBridging Your Innovations to Realities
PSC Box Girder
Constructability Check
Construction Stage Analysis to check the
erection sequence
Auto Generate Construction Stage Modelbased on construction type.
Auto Design Check for consistency in CS
Model
Obtain Camber Diagrams
Check the force effect in each stage and
plan accordingly
26
Design Optimization
Static / Moving Load
Design Check
Modify Design
Problem Statement
Preliminary Statement
SSI / SeismicAnalysis / Constructability Check
Detailed Design
Pier Design
midas Civil
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midas CivilBridging Your Innovations to Realities
PSC Box Girder
Constructability Check
Benefits?
Auto Generated Construction Stage from
the Program leads to lesser modeling time
Single Model file for Static, moving, dynamic
and construction stage analysis considering
soil structure interaction reduces the data
loss when used different software
Design optimization in the same software
No need to learn different software/different
GUIs
27
Design Optimization
Static / Moving Load
Design Check
Modify Design
Problem Statement
Preliminary Statement
SSI / SeismicAnalysis / Constructability Check
Detailed Design
Pier Design
midas Civil
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midas CivilBridging Your Innovations to Realities
PSC Box Girder
Detailed Design
Detailed Design Considering the Static
AndDynamic Effects
28
Design Optimization
Static / Moving Load
Design Check
Modify Design
Problem Statement
Preliminary Statement
SSI / SeismicAnalysis / Constructability Check
Detailed Design
Pier Design
midas Civil
8/11/2019 Optimize MIDAS
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midas CivilBridging Your Innovations to Realities
PSC Box Girder
Pier Design
Obtain PMM curve for Pier Design
Check Pier Section for Cracking
Obtain Moment Curvature Diagram
Fiber Section for refined Dynamic Analysis
29
Design Optimization
Static / Moving Load
Design Check
Modify Design
Problem Statement
Preliminary Statement
SSI / SeismicAnalysis / Constructability Check
Detailed Design
Pier Design
midas Civil
8/11/2019 Optimize MIDAS
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midas CivilBridging Your Innovations to Realities
PSC Box Girder
Special Modeling Tools
Before applying variation of
section dimensions
After applying variation of
section dimensions
Before applying variation of section
dimensions
After applying variation of
section dimensions
Model any type of Curve in Bridge
Auto Generate the Tapered Section
Define Reinforcement Span by Span
30
midas Civil