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Bridging Your Innovations to Realitiesmidas Civil Training Series
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Bridging Your Innovations to Realities
Bridging Your Innovations to Realitiesmidas Civil Training Series
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Webinar Options
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1 Attendee Mic muted
Raise Hand button
Box to type questions.
Questions would be answered at the end of the session depending on available time.
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Topics covered on Day 1
Material Properties Section Properties FCM Wizard Tendon Property Definition
Tendon Profile Generation Tendon Prestress
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Topics covered on Day 2
Substructure Modelling Structure, Boundary & Load Groups Links Bearing Modelling Boundary Definition
Loads Time Dependent Material Properties
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Topics to be covered on Day 3
Construction StagesMoving Load Generation Load Combinations Results
Beam Detail Analysis Dynamic Report Generation
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Procedure for construction stage analysis
Define materials, sections, and geometry
Assign elements, boundaries, & loads to the groups
Define time dependent materials
Enter the construction stage analysis data
Define tendon properties, profiles, and prestress loads
Perform an analysis
Check results for each construction stage
•Creep & Shrinkage•Compressive strength
•Specify the duration of CS•Activate/Deactivate element groups / boundary groups/ load groups
•cross sectional area, material properties, ultimate strength, duct diameter, frictional coefficients•Tendon placement profile•tensions applied to the tendons
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02First we need to decide where to place lanes over the deck.
Crash Barrier + Footpath of 1m each on both ends
Carriageway Width:
10.13 – 2 = 8.13 m
According to IRC 6 Table 2:Live Load CombinationFor Carriage way Width 5.3< CW <9.6
We have 2 Combinations
1. 1 Lane of Class 70R running with minimum Eccentricity from the kerbs
2. 2 Lanes of Class A running with minimum Eccentricity from the kerbs.
So, we need to define 3 lanes.
Vehicular load to be considered
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02 Vehicular load to be considered
Eccentricities for the traffic lane from the centerline of the bridge:
Class A 1: 10.13/2 – 1 (footpath) – 0.15 (Min Clearance) – 0.25 (Single Wheel Width/2) – 1.8/2 (C/L of Class A vehicle)= 5.065 – 2.55 = 2.765 m
Class A 2: 5.065 – 2.515 – 1.8/2 – 0.25 – 1.2 – 0.25 – 18./2= – 0.735 m
Class 70R: 5.065 – 1 – 1.2 (Min Clearance) – 2.79/2 (C/L of Class 70R Vehicle)= 1.47 m
Load cases considered for vehicular load application:
1) Class A 1 Lane loaded with Class A Vehicle2) Class A 2 Lane loaded with Class A Vehicle3) Class A 1 and Class A 2 Lanes loaded with class A Vehicle simultaneously4) Class 70R Lane loaded with Class 70R Vehicle
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Lane element: Apply loads to the traffic line lane elements reflecting the eccentricity.
When defining lanes by the lane element type, the vertical load components (vehicle loads) and the moments due to the
eccentricity are assigned only to the line lane elements. Even though the lanes can be located on cross beam elements,
if the lane element type is selected, then the distribution of the loads onto the cross beams will not be considered.
Cross beam: Apply the traffic loads to the cross beams.
When using Cross Beam type, the eccentricity is used only for locating the lanes from the line lane elements. The
vehicle loads are distributed to the girders via cross beam elements defined as a Cross Beam Group. If the user is
modeling a bridge having multiple girders, the Cross Beam type is recommended for vehicular load distribution.
For example, an axle load of 100kN is located as shown below. Then, concentrated loads, 25kN and 75kN, are applied to
point A and point B respectively. The cross beams themselves are loaded.
Vehicular load distribution
100kN
A
B
3.Balanced Cantilever Bridge Analysis
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Moving Load Analysis Control
3.Balanced Cantilever Bridge Analysis
Number/Line Element : Assign the number of reference
points on a line element for moving loads and drawing
influence line in an influence line analysis. The
accuracy of results increases with the increase in the
number, but the analysis time may become excessive.
Normal + Concurrent Force : If the output of concurrent
forces for max and min values is required for moving
load analysis, select 「Normal + Concurrent Force」.
Note
Concurrent forces are not calculated for LM1 & 3 (Multi)
model.
Select the specific group for which analysis results need to be checked in order to reduce analysis time.
[Structure Group: Results]
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Load Combination
3.Balanced Cantilever Bridge Analysis
USE: To see the force effect due to a combination of loads.
Also for defining combinations for strength and service limit
states.
TYPE: The load combinations can be made considering
the loads activated in the stages and specifying factors for
the same.
The load combinations can be automatically generated for
the following codes:
AASHTO LRFD 07
AASHTO Standard 2000
AASHTO LRFD 02
Indian Code
Eurocode
Taiwan Code
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(10) Beam Detail Analysis
4. Useful Functionalities
•Produce a detail deformed shape, SFD/BMD, maximum stress distribution and
sectional stress distribution diagrams for a particular section.
•Stresses can be calculated at any points of the section for the various section types
(DB, PSC, Tapered Section, Composite Section, General and Composite General
Section).
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Technical Support & Service
Upcoming Training workshop
BangaloreDelhiMumbai
KolkataHyderabadChennai
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Technical Support & Service
Next Week Saturday
Mumbai(February)
• 21st February, 2015
• I-Girder Composite Design
• Andheri (E)
• Free Training Workshop
Bridging Your Innovations to Realities
Thank You!Thank You!Helpdesk: [email protected]