femfan3d & non-linear complex steel joints checker
DESCRIPTION
FEMFAN3D & Non-linear complex steel joints checker. FEMFAN3D BIM enablement & SS EN Designs. Part 1. Background. What is FEMFAN3D ? Fully developed and maintained by PTRC, NTU in Singapore - PowerPoint PPT PresentationTRANSCRIPT
FEMFAN3D &
NON-LINEAR COMPLEX STEEL JOINTS CHECKER
FEMFAN3DBIM ENABLEMENT & SS EN DESIGNS
Part 1
BACKGROUND• What is FEMFAN3D?
• Fully developed and maintained by PTRC, NTU in Singapore
• The one-of-its-kind finite element software for the investigation of building robustness against progressive collapse due to man-made or natural hazards
• Provide super element formulation that cut down analysis time needed from days to hours
BACKGROUND• FEMFAN3D GUI
• Project completed in 2011• Fully developed in Singapore• Point-and-click modeling to simplify structural
robustness checking against progressive collapse• Seamless modeling, analysis and review of FEMFAN3D
results• Parametric material
definition• Parametric member
modeling
Why FEMFAN3D ? No equivalent commercial software
THE CHALLENGES• New SS EN (replacing British Standard completely by1 Apr
2015) calls for non-linear analysis and design of critical structures (members + joints)
• Mandatory seismic design for buildings in selected areas
• We need an “all-in-one” and “well tested” solution for daily production use
ENHANCING FEMFAN3D TO MEET THE NEEDS
• Support Steel and Composite materials and members• Support model import/export with
• BIM platform(s)• 3rd party engineering software
• Support member design to • Eurocode 2 (concrete)• Eurocode 3 (steel)• Eurocode 4 (composite) • Eurocode 8 (seismic)
• To include fire checking in solver• Support checking of complex joints*
*see also Part 2: Non-linear Complex Steel Joints Checker
Pt 1. FEMFAN3DConcrete Design
Steel Design
Composite Design
Fire Safety Assessment
Joints Check
Pt 2. Non-linear Complex Steel Joints Checker
Impo
rt/ex
port
Structural RobustnessAssessment
impo
rt import
Conc
rete
on
ly fo
r now
Seismic Assessment
NON-LINEAR COMPLEX STEEL JOINTS CHECKER
Part 2
THE PROBLEM• Complex steel joints exist in many
modern building and off-shore structures
• Such joints can only be checked using non-linear finite element method, which is costly, requires high level of expertise, and time consuming
• EC3 Pt. 1-8• Since it is costly, most likely the
checking is non-exhaustive
Image credit : Parsons Brinkerhoff Pte. Ltd.
MAKING THINGS WORSE
1. Engineer may not aware that their favorite Linear Analysis tools doesn't fit the job
2. New design code• British Standard : Silent (and we just take it for
granted for years)• Eurocode: Explicitly calls for Non-linear Analysis
3. Advanced Non-linear Analysis Packages (eg.ABACUS)• Expensive !• Require high-lever of expertise (choice of element,
making assumptions, interpreting results, …)• Typically very tedious and time consuming process
?
Image credit : Parsons Brinkerhoff Pte. Ltd.
LINEAR VS. NON-LINEAR
SOLUTION?• A standalone application to
• Create finite element sub-model of complex steel joints from BIM/Structural analysis software package (like Tekla/Revit & ETABS/Staad.PRO)
• Transfer member end forces from those package to the FE model for all the load combinations
• Perform and report issue with simple one click of button Automate the joint
model creations and load
applicationsEquivale
nt loads
Equi
valen
t loa
ds
Equivale
nt loads
Full 3D BIM model
Report failure
based on Von-
misses stress
resultants
Non-linear
Analysis
Extract resultants from 3rd party
structural analysis software
[e.g. ETABS/StaadPro]
Mesh into 3D
triangular/quadril
ateral meshes
Extract Joint
Geometry from 3rd
Party BIM/structural software
[e.g. Tekla/Revit/
ETABS/StaadPro]
PROPOSED WORKFLOW
BENEFITS• Significant time saving in modeling, loading input• Reduced input errors• Speedy revisions and alterations• Enabling exhaustive checking of all complex steel
joints • Enabling average engineer to perform advanced non-
linear analysis• Elevating local industry standards• Prepare engineers for global marketplace
KEY COMPONENTS• The Pre-processor (from Advance Contech)• The Revit/StaadPro/ETABS/SAP2000 bridge (from Advance)• The Mesher (from NTU?)• The Solver (from NTU?)• The Post-processor (from Advance Contech)• Others?