bridging your innovations to realities -...

Bridging Your Innovations to Realitiesmidas Civil Training Series

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Bridging Your Innovations to Realities


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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


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


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]

bridging your innovations to realities -...

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