Optimize MIDAS

8/11/2019 Optimize MIDAS

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Bridging Your Innovat ions to Real i t ies

midas CivilOptimize Detailed Design of PT B

ox Girder

Using a Common Platform



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




PSC Box Girder

Preliminary Design


Seismic Analysis

Detailed Design




3

Software C/D

Software A

Software B




PSC Box Girder


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




PSC Box Girder


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




PSC Box Girder


6

How Would it feel like to do everything in one Software,

at the same platform?




PSC Box Girder

Preliminary Design


Seismic Analysis

Detailed Design




7

1 Software




PSC Box Girder


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




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


9

More Projects

in Lesser Time

Higher Degree

of CompetencyMonetary Effects

No Repetition

of Work




PSC Box Girder


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




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




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


Design Check

Modify Design

Problem Statement



Detailed Design

Pier Design




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


Design Check

Modify Design

Problem Statement



Detailed Design

Pier Design




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


Design Check

Modify Design

Problem Statement



Detailed Design

Pier Design




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


Design Check

Modify Design

Problem Statement



Detailed Design

Pier Design




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


Design Check

Modify Design

Problem Statement



Detailed Design

Pier Design




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


Design Check

Modify Design

Problem Statement



Detailed Design

Pier Design




PSC Box Girder

Design Optimization

18

Design Optimization


Design Check

Modify Design

Problem Statement



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




PSC Box Girder

Design Optimization

20

Design Optimization


Design Check

Modify Design

Problem Statement



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




PSC Box Girder

Design Optimization

21

Design Optimization


Design Check

Modify Design

Problem Statement



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




PSC Box Girder

Design Optimization

22

Design Optimization


Design Check

Modify Design

Problem Statement



Detailed Design

Pier Design

Model the foundation

id Ci il




PSC Box Girder

Design Optimization

23

Design Optimization


Design Check

Modify Design

Problem Statement



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




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


Design Check

Modify Design

Problem Statement



Detailed Design

Pier Design

id Ci il




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

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Design Optimization


Design Check

Modify Design

Problem Statement



Detailed Design

Pier Design

id Ci il




PSC Box Girder


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


Design Check

Modify Design

Problem Statement



Detailed Design

Pier Design

midas Civil




PSC Box Girder


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


Design Check

Modify Design

Problem Statement



Detailed Design

Pier Design

midas Civil




PSC Box Girder

Detailed Design

Detailed Design Considering the Static

AndDynamic Effects

28

Design Optimization


Design Check

Modify Design

Problem Statement



Detailed Design

Pier Design

midas Civil




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

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Design Optimization


Design Check

Modify Design

Problem Statement



Detailed Design

Pier Design

midas Civil




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




Thank You

31

Optimize MIDAS

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