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THEORY AND EXAMPLES
IDEA StatiCa Connection – unique inovative solution
General model - CBFEM
• Plates – elastic/plastic model, 5% strain
• Bo...
ANSYS/ABAQUS for everyday life….
There are 2 models in the application:
• Structural (what we see)
• Analysis (how it is c...
News in version 7.1
5
Overall presentation of all
results on one picture is still
missing.
Solution?
Traffic lights!
Presentation of checks -> traffic lights
6Steel joints – where we are
7Steel joints – where we are
Presentation of checks -> traffic lights
8Přípoje – teorie a praxe
Presentation of checks -> traffic lights
WELDS
Welds are model by a special elastoplastic element which is added
between the plates. The nonlinear material analysis is a...
Why, where to use
……
Why we have two approaches
11Steel joints – where we are
New analysis model of welds with plastic behavior
12Steel joints – where we are
13Steel joints – where we are
EXAMPLE
Welds – elastic and plastic model
BOLTS AND CONTACTS
Contact surfaces (elements)
15Steel joints – where we are
Contacts take 100% of pressure, but no tension.
Interaction tension-shear in the model of bolt
Result „Bearing“ Check in 7.0 Interaction formula v 7.0
Results „Interactio...
Tables of bolts checks
17Steel joints – where we are
We have reorganized bolts checks tables and separated them into group...
18
EXAMPLE
Bolts and contacts
TEKLA LINK
Tekla Structures – story behind the link
20
1st version developed in 4Q 2015
Continuous improvements for Tekla 21.0 and 21...
Tekla Structures – tips and tricks, limitations
21
Link now works for a wide variety of connections/joints. However,
pleas...
22Steel joints – where we are
EXAMPLES
Tekla link
STIFFNESS
Rotational capacity of the connection
24Steel joints – where we are
Rotational capacity provides
information about
connect...
25Steel joints – where we are
EXAMPLE
Stiffness
Stiffening member
26Steel joints – where we are
Segments of hot rolled or cold
formed profiles can be used for
stiffening ...
PRELOADED BOLTS
Preloaded bolts – friction connections
Standard bolts transfer shear force by bearing.
Preloaded bolts transfer shears for...
Standard bolt
Preloaded bolt
29Steel joints – where we are
Preloaded bolts – friction connections
30Steel joints – where we are
EXAMPLE
Preloaded bolts
SEISMIC DETAILS
Local mechanisms
Recommended Beam to Column Connections in
moment resisting frames
32
Bolted beam flanges
and web
Welded f...
Check of dissipative elements
Rotation Capacity of steel connection
33
Ductility U.S. Europe
Medium 20 25
High 40 35
Non-dissipative connections are designed on the bending
moment calculated from the maximal capacity of connected
(dissipat...
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IDEA Steel Connect v. 7 - Theory and examples

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Steelconnections theory en examples about welds, bolts, stiffness and seismic details.

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IDEA Steel Connect v. 7 - Theory and examples

  1. 1. THEORY AND EXAMPLES
  2. 2. IDEA StatiCa Connection – unique inovative solution General model - CBFEM • Plates – elastic/plastic model, 5% strain • Bolts – standard bolts, preloaded bolts, anchors • Welds – elastic or plastic model • Contacts – one-way constrain between plates • Concrete for anchoring – contact stress, break-out cones 3
  3. 3. ANSYS/ABAQUS for everyday life…. There are 2 models in the application: • Structural (what we see) • Analysis (how it is calculated) And there is the Chinese wall between them Analytical-scientific (CBFEM) engine is the core of the product, it is the must for the success. But it is also critical that it is hidden. The key for success is the structural model based on manufacturing operations. Majority of engineers understand what is a plate or bolt and where they want to put it in the joint. It is no rocket science, it is daily life. 4
  4. 4. News in version 7.1 5 Overall presentation of all results on one picture is still missing. Solution? Traffic lights!
  5. 5. Presentation of checks -> traffic lights 6Steel joints – where we are
  6. 6. 7Steel joints – where we are Presentation of checks -> traffic lights
  7. 7. 8Přípoje – teorie a praxe Presentation of checks -> traffic lights
  8. 8. WELDS
  9. 9. Welds are model by a special elastoplastic element which is added between the plates. The nonlinear material analysis is applied and elastoplastic behavior in equivalent weld solid is determinate. Ideal plastic model is used and the plasticity state is controlled by stresses in the weld throat section. The results are significantly more accurate (long welds, not fully stiffened joints). Method of weld modeling from version 7.0 (and previous) can be still used for fast pre-design of complex connections. New analysis model of welds with plastic behavior 10Steel joints – where we are
  10. 10. Why, where to use …… Why we have two approaches 11Steel joints – where we are
  11. 11. New analysis model of welds with plastic behavior 12Steel joints – where we are
  12. 12. 13Steel joints – where we are EXAMPLE Welds – elastic and plastic model
  13. 13. BOLTS AND CONTACTS
  14. 14. Contact surfaces (elements) 15Steel joints – where we are Contacts take 100% of pressure, but no tension.
  15. 15. Interaction tension-shear in the model of bolt Result „Bearing“ Check in 7.0 Interaction formula v 7.0 Results „Interaction“ Check 7.1 Interaction diagram 16Steel joints – where we are
  16. 16. Tables of bolts checks 17Steel joints – where we are We have reorganized bolts checks tables and separated them into groups: • Bolts • Preloaded bolts • Anchors
  17. 17. 18 EXAMPLE Bolts and contacts
  18. 18. TEKLA LINK
  19. 19. Tekla Structures – story behind the link 20 1st version developed in 4Q 2015 Continuous improvements for Tekla 21.0 and 21.1 Big change with TS 2016 – API adjusted, ribbon not working etc. (“setback”) TS 2016i – solved most of the issues, caught up with changes Know limitations/remarks, tips and tricks Trimble/Tekla likes it by they do not like to work on it – it is all on IDEA and partially on Construsoft Two-way link not in the near future
  20. 20. Tekla Structures – tips and tricks, limitations 21 Link now works for a wide variety of connections/joints. However, please take into account yet unsupported functionality: Holes in members Import the whole joint and manually add openings in IDEA StatiCa Connection. Anchoring and base plate Import the whole joint and manually add base plate in IDEA StatiCa Connection. Welded and composed cross-sections. Properly define cross-sections in Tekla Welded and composed cross-sections General CSS are not supported yet.
  21. 21. 22Steel joints – where we are EXAMPLES Tekla link
  22. 22. STIFFNESS
  23. 23. Rotational capacity of the connection 24Steel joints – where we are Rotational capacity provides information about connection ductility and ability of seismic energy absorption. Its value is calculated for 15% plastic deformation and can be found in the results table.
  24. 24. 25Steel joints – where we are EXAMPLE Stiffness
  25. 25. Stiffening member 26Steel joints – where we are Segments of hot rolled or cold formed profiles can be used for stiffening of steel joint. Stiffening members behave in the joint the same way as basic steel members – all manufacturing operations can be applied on them. Stiffening members cannot take loads. They are not a part of 3D global model of the structure.
  26. 26. PRELOADED BOLTS
  27. 27. Preloaded bolts – friction connections Standard bolts transfer shear force by bearing. Preloaded bolts transfer shears force by friction between plates into all directions around the bolt. The connection is much better from the point of view of deformations. On the other hand the resistance is lower. IDEA StatiCa Connection check the limit state „slip“ in the model. The resistance is set in the moment of the slip. Limit resistance of the connection „after slip“ can be checked by bearing like for standard bolts. 28Steel joints – where we are
  28. 28. Standard bolt Preloaded bolt 29Steel joints – where we are Preloaded bolts – friction connections
  29. 29. 30Steel joints – where we are EXAMPLE Preloaded bolts
  30. 30. SEISMIC DETAILS
  31. 31. Local mechanisms Recommended Beam to Column Connections in moment resisting frames 32 Bolted beam flanges and web Welded flanges and bolted web Reduced beam section (dog bone)
  32. 32. Check of dissipative elements Rotation Capacity of steel connection 33 Ductility U.S. Europe Medium 20 25 High 40 35
  33. 33. Non-dissipative connections are designed on the bending moment calculated from the maximal capacity of connected (dissipative) member. Check of non dissipative elements Capacity Design Will be in the upcoming release of the IDEA StatiCa. 34 𝑅 𝑑 ≥ 1,1 𝛾𝑜𝑣 𝑅𝑓𝑦

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