Tek-Tips is the largest IT community on the Internet today!

Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!

Register Log in
  • Congratulations JAE on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!

Recent content by icebloom

  1. icebloom

    Thread embedment required for bolt in tension

    See file at link below which discusses the strength of partial nut engagement for bolts, which may be helpful. Obviously code requirements are always for full engagement for a given nut but from a theoretical POV it may help...
  2. icebloom

    Bearing pressure for rectangular footing double eccentricity

    The complete analytical solution is quite complex. It can be found in the linked article: https://www.researchgate.net/publication/312362987_Complete_Analytical_Solution_for_Linear_Soil_Pressure_Distribution_under_Rigid_Rectangular_Spread_Footings
  3. icebloom

    Development length cog - AS 3600

    Correct, provided there is a cross bar in the corner of the cog. Without a cross bar you can only take the bar stress to 400MPa as per the clause in chapter 13.
  4. icebloom

    Hilti Profis Shear Reinforcement

    HILTI has the ability to design anchor reinforcement (not sure if to ACI, but to eurocode it does). Some of the confusion is the terminology - in America "anchor reinforcement" is the term used to denote reinforcement thats designed to take all the anchorage loads, whereas in the rest of the...
  5. icebloom

    Column Base Plate Anchor Bolts

    There has been research recently into this including by HILTI and they have developed a methodology which is included in their PROFIS software which seems to be able to achieve better results for shear with lever arm. Haven't looked into it yet in that much depth but there may be something in...
  6. icebloom

    Concrete edge breakout for multiple anchors in a single row (drag load)

    This kind of load sharing for pryout is something not really covered in the codes or in softwares like HILTI or Idea Statica as far as I know, however in the fib design guide 58 on concrete anchorage there is some more information on this. You can also find newer info in the following paper...
  7. icebloom

    Concrete edge breakout for multiple anchors in a single row (drag load)

    If you want to ensure load sharing between all the anchors you can use HILTI filling washers or similar, which allow injection of mortar or epoxy into the gap between anchor and baseplate allowing engagement of all anchors. Then your shear force per anchor will be something like V/n where V is...
  8. icebloom

    How do you know if your column base connection is a moment connection?

    I think there are hand methods with which you can do the calcs, but if you have access to FEA software or commercial software like idea statica you can do a stiffness analysis in it which gives you the joint spring stiffness. Thick baseplates can provide a moment connection, but as others have...
  9. icebloom

    Deep embedment of anchor for capacity

    We've done epoxy rebar to something like 2m or so injection depth before. Another problem is more finding a drill long enough to actually get that deep. Lookup HILTI HIT-SZ injection accessories and HIT-VL extension hoses - from memory that is what was used. I think they've also got videos on...
  10. icebloom

    AISC Chapter I - Composite Section: Stress and Strain Distribution in Composite Section

    Oehlers and Bradford have written two books on composite design which go in depth into all aspects (Composite Steel and concrete structures: fundamental behaviour, and Composite steel and concrete structures, elementary behaviour). There are also design guides and books by RP Johnston with focus...
  11. icebloom

    Ideastatica Load Transfer

    These kind of bearing connections are tricky to model in idea statica. Its almost worth just doing it by hand. You won't be able to build the model you are trying to build by connecting two members where one of the member is the angle with the load introduced via the angle. The load in this...
  12. icebloom

    Filler plates vs shim plates slotted in direction of shear - bolt strength reduction due to bending?

    With a slotted finger shim I'd say there is inherently less clamping than if you had a full filler plate as your endplates need to span horizontally across the gap. I guess it all depends on context, what is the force in the bolts, what is the gap, and what is the thickness of the plates. We...
  13. icebloom

    Filler plates vs shim plates slotted in direction of shear - bolt strength reduction due to bending?

    Thanks for the reference @human909, I will have a read. I've looked through the literature myself and found the common papers and equations for reduction in strength due to filler plates. Finger shims seem quite common and yet intuitively I'd say there is less capacity than with filler plates...
  14. icebloom

    Breakout of I-Beam Cast in Concrete

    If you look into the design of composite steel beams there are provisions in various design codes for when shear studs are welded to beam webs with the slab coming in at the web level, rather than the more common arrangement with steel decking plus studs going over the top of a steel beam. Not...
  15. icebloom

    Concrete edge (breakout) failure in shear on anchor group - Eurocode 1992-4 vs ACI 318

    Personally I think introducing undue eccentricity via a connection that seems a bit convoluted into the design simply to somehow try justify full engagement of the bolts is not the way to go. Even under moderate loads if you consider bending of the bolts in shear as the Eurocode tells you to (in...
See more

Part and Inventory Search

Back
Top