Online training course

Session 1Session 1Getting started with LUSASSession will start on the hour

Session 1

Getting started with LUSASGetting started with LUSASPresented by:Julian Moses CEng MIStructEAndy Taylor CEng MICE

Audio Settings• We are now talking• If you can’t hear us, please click Sound Check, then the Settings

cog, then select your speakers

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Audio Settings• If you still can’t hear us, please be aware that a recording of

this session will be made available afterwards• But we’re now going to move on with the session for the

benefit of the majority of trainees who have working audiobenefit of the majority of trainees who have working audio

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Schedule• 7th October Getting started with LUSAS

• 14th October Understand more about LUSAS

• 21st October Creating mixed element models

• 28th October Creating 3D shell models and considering buckling

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Training Format• 2 hour session

– Presentation on basic LUSAS features– Demonstration of LUSAS on basic structure– Type questions into the Questions or Chat box – Type questions into the Questions or Chat box – Session will be recorded

• Homework– Worked Example for you to complete (see handouts)– Support available via email (onlinetraining@lusas.com)– Quiz to test your understanding

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Training Format• Installation/Licenses

– You don’t need LUSAS installed or a license to watch this session– You do need it installed with a license to do the homework!– If you don’t already have one, please contact your local LUSAS expert – If you don’t already have one, please contact your local LUSAS expert

and ask them to contact their LUSAS Account Manager

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What is LUSAS?• Analysis software for Engineers• Windows native • Feature-based associative modeller • Full-featured Finite Element solver • Full-featured Finite Element solver • Application-specific graphical interface

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What is FE analysis?• Technique for analysing “structures”

Gateshead Millennium Bridge, UK

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What is FE analysis?• Technique for analysing “structures”

Gateshead Millennium Bridge, UK

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Performing an analysis

• Describe features• Describe attributes

Pre-process

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• Solve equations

• Inspect the results

Solution

Post-process

LUSAS Feature Geometry

• Points• Lines

Features map out the shape of the object

• Lines• Surfaces• Volumes

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HIERARCHY and ASSOCIATIVITY

LUSAS Model Attributes

Mesh Supports and loads

Geometric properties Material properties

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Features

DEFINE and ASSIGN

Mesh Supports and loads

LUSAS Modeller WindowMain Menu Toolbar buttons

Treeview

Graphics window

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Data tips

Text window

Status bar

LUSAS Modeller Treeview

Layers – control what is displayedGroups – control what parts are visibleAttributes – edit & assign attributesAnalyses – select a loadcase for viewingUtilities – view & edit sets of data (advanced)Reports – assemble reporting information

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Concrete arch bridgeOparno, Czech Republic

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Concrete arch bridgeOparno, Czech Republic

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Concrete arch bridge e101B-SI7.5 10 10

7.5

1

8

5

0.15

0.350.10

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MaterialConcrete EU, fck=40MPaLoadingGravitySurfacing (Global dist) 26kN/mLive UDL (Internal beam dist.) 34.5kN/mSkidding load (Concentrated) 750kN

Mesh attributesThick beam 3DGeometric attributesArch: RSS D=0.8, B=3Uprights: RSS D=0.4, B=3Deck: box section as above

Basic checklist• Reactions• Deformed shape• Magnitude of deformations• Warning or error messages• Warning or error messages• Mesh refinement

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Arch bridge results• Diagram of Axial Force (Fx)• Bending moment (My) on deck (Groups)• Deformed mesh & window summary• Print Results Wizard• Print Results Wizard• Values (Reactions)• Contours of stress• Basic combination• Change support conditions (new analysis)

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Concrete arch bridge e101B-SI7.5 10 10

7.5

1

8

5

0.15

0.350.10

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Further geometry optionsCopy, move, sweepAutomatic merging of coincident featuresAdvanced toolbar

Selection optionsSelection tool buttonsShift adds, CTRL togglesAlt selects items crossedP=points, L=lines, S=surfaces etcRight-click > Advanced selection

Creating Geometry• Geometry menu• Define toolbar

– copy, move, sweep“copy & paste” data

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– “copy & paste” data– automatic merging

of coincident features• Advanced toolbar

– View > Toolbars...

View tools & selection• View tools: inc. rotate & zoom

• Selection• Selection– Selection tool buttons (above)– Shift adds, CTRL toggles– Alt selects items crossed– P=points, L=lines, S=surfaces etc– Right-click > Advanced selection

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Attributes• Define• Assign (drag and drop)• Edit from the Treeview

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Standard section property calcs

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Standard section property calcs• Haunch section • Thin walled sections• Unequal sections• Compound sections• Compound sections• Box section

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Drawing layers• Switch layers on and off:

– With nothing selected, right-click in the Graphics Window

• Changing settings PRE• Changing settings– Double-click on layer in TreeView (Layers

tab)

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PRE

POST

Basic combinations• Analyses menu• Combinations can include

– Loadcases– Other combinations– Other combinations– Envelopes

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Multiple analyses• Analyses menu

• Allows storage of linear, nonlinear, dynamic and other analyses together

• Allows comparisons e.g. alternative support conditions, geometric properties, materials.

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Connectivity• Basic checklist

– Reaction OK– Deformed shape?

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Connectivity• Lines connect at a shared point

• Surfaces connect at a shared line

• Volumes connect at a shared surface

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Loading• Structural loads

– a.k.a. Element loads & nodal loads– e.g. gravity, temperature etc– Tied to the mesh (most FE programs)– Tied to the mesh (most FE programs)

• Discrete loads– Projected onto the mesh (LUSAS)– e.g. vehicles

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Vehicle loadsSI• Bridge > Bridge loading

• Assign to any pointfeature

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Discrete loads & search area• Visualise by definition

• Visualise by effect on mesh– Control projection of loads

using search area

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Moving load generator

• Define vehicle/ discrete load• Define vehicle/ discrete load• Draw a line which acts as the path• Include search area if required• Use Bridge > Moving load generator

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Moving load generator

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Envelopes• Analyses menu

• Max and Min envelopes in pairs

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Smart combinations• Allow consideration of different factors for adverse & beneficial

load effects• Max and Min smart combinations in pairs (like envelopes)

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Smart combinations

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• Beneficial 0.95, Adverse 1.3 in this instance• Read more about Smart Combinations in

the Help

Design combinations SI• Tell LUSAS which loadcases are which load type, and LUSAS can

automatically factor them for you, to your design code

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Review of session• Features map out the shape of the object• Attributes – define & assign• Connectivity• Structural loads (tied to mesh)• Structural loads (tied to mesh)• Discrete loads & search areas• Moving loads• Combinations & envelopes• Design capacity checks

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Worked Example and Quiz• Complete Concrete Arch Bridge example• Session 1 Quiz, on the module and arch example at:

– https://www.lusas.com/uk_roi_eu/index.html

– Username: session1– Password: LazyDog77##

• Questions on the module, arch example or quiz can be sent to:– onlinetraining@lusas.com

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Next Session• Session 2 – Understand more about LUSAS

– Additional LUSAS features– Mesh refinement– Skewed flat slab example

• 14th October (next week) at 14:00 BST (same time as today’s session)

• Please register!

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Online training course

Thank you for attending the session

Contact: onlinetraining@lusas.com