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FEMFAN3D & Non-linear complex steel joints checker

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

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FEMFAN3D & Non-linear complex steel joints checker

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  1. FEMFAN3D & Non-linear complex steel joints checker

  2. FEMFAN3DBIM enablement & SS EN Designs Part 1

  3. 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

  4. 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 materialdefinition • Parametric member modeling Why FEMFAN3D ?  No equivalent commercial software

  5. 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

  6. 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

  7. Structural Robustness Assessment Concrete only for now Pt 1. FEMFAN3D Concrete Design Steel Design Import/export Composite Design Fire Safety Assessment import import Seismic Assessment Joints Check Pt 2. Non-linear Complex Steel Joints Checker

  8. Non-linear Complex Steel Joints checker Part 2

  9. 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.

  10. Making things worse Linear vs. non-linear • Engineer may not aware that their favorite Linear Analysis tools doesn't fit the job • New design code • British Standard : Silent (and we just take it for granted for years) • Eurocode: Explicitly calls for Non-linear Analysis • 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.

  11. 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 Full 3D BIM model Equivalent loads Automate the joint model creations and load applications Equivalent loads Equivalent loads

  12. Proposed workflow

  13. 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

  14. 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?

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