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  1. Luceid

    Confined Concrete Backbone Difference: Fiber Hinge Result weaker than Nonlinear Material Data

    Hm - I've only used fiber sections with wall shells, not columns, so I'm not too sure about that
  2. Luceid

    Confined Concrete Backbone Difference: Fiber Hinge Result weaker than Nonlinear Material Data

    Can you provide any other screenshots of the setup of the nonlinear material and the fiber hinges? Always easy to double check that there isn't some user input error....I'll check my fiber hinges in a model I'm working on to compare later today.
  3. Luceid

    PE Civil Structural Exam

    Agreed with above ^ the NCEES practice exam is by far the closest to reality. Other books I did practice questions with were significantly more difficult and had me really struggling to manage time
  4. Luceid

    Valid Pin Boundary Condition?

    Will it provide moment resistance? To some extent...yes as almost always. The moment would be resolved as base plate bearing on the concrete and tension in the bolts. But depending on the elongation and movement, this becomes more and more like a pin. Engineering judgement as always
  5. Luceid

    ETABS ASCE 41-17 Auto Plastic Hinges

    If you double-middle click while in the plot, does it fix itself? I think the X-axis is just scaled improperly
  6. Luceid

    Truss Roof – Joint Force Imbalance Due to TRP Plate Modeling

    How much of "not in equilibrium" are we talking? It depends on the relative stiffness of the elements, if your plates are super thick, maybe 0.001 isn't enough to make them completely negligible relative to the truss chord stiffness. If they have stiffness, they will attract some force. I'm...
  7. Luceid

    Wall reactions

    If this is what you want - you need to turn off the setting that applies restraints at wall mesh nodes that are coincident with the edge between two restraints. This will force the mesh to only have supports at the ends of the wall, which may or may not be realistic. The setting is somewhere in...
  8. Luceid

    Protected Zone - Directly welded moment connection

    Isn't this essentially the pre-Northridge type of moment connection that directs damage into the column? Is this being used in a seismic case?
  9. Luceid

    Deciding the lateral force resisting system.

    Yeah - the diaphragm isn't really spanning far between lines of support, there's definitely some simple calcs you could do to vet the diaphragm forces.
  10. Luceid

    Use of eccentricities values to counter the torsion in ETABS.

    I am not sure what you are tryin to achieve here. Can you provide an image of the building itself, as in some cases, torsion could very well be the first mode.
  11. Luceid

    Calculation of crack widths in foundation design

    Interestingly, if you follow a crack width calculation process per CIRIA's guidelines, increased concrete cover makes things worse because the crack actually gets wider as cover increases, bringing you closer to whatever limit you set. For rafts with significant hydrostatic uplift, this is a...
  12. Luceid

    SAP2000 measurements

    You can also right click a frame and go to the geometry tab to see its length
  13. Luceid

    SAP2000 measurements

    It's either Edit->Measure->Line or View->Measure->Line
  14. Luceid

    Boundary Zones for Core Walls

    ...as a full section per ACI 318-19, does the entire core become a complete boundary element all the way around, if the boundary element length (c-0.1*lw or c/2) is longer than the thickness of the "flange" wall (as shown below)? I can understand the rationale - if the flange is in fact all...
  15. Luceid

    Loads/Units shown on drawings

    This is where my head is at - I would be real bummed to get burned by silly things like this, as it seems like has happened
  16. Luceid

    Loads/Units shown on drawings

    Do some drawings not? I am not yet licensed, but I feel like I would be pretty nervous using abbreviations if they aren't explicitly defined somewhere, even for the common stuff.
  17. Luceid

    Simpson Strong-Link

    From some limited experience - I have been around folks who were using the yield-link connection on SMF's in Southern California. During the design process Simpson seemed to be very responsive in a design assist manner, and a lot of the detailing work is done in the back end (similar to any...
  18. Luceid

    question about determinacy

    Does this hinge actually give you an additional equation? Since it's still hooked up at the top....
  19. Luceid

    Draw Special Joint

    Interesting - that's annoying! I usually just use the replicate and move tools to copy joints that already exist from frames, shells etc. This is surprising though, I have definitely used the special joint tool.
  20. Luceid

    Draw Special Joint

    Also - try both graphics modes (Standard vs DirectX), crashes seem to occur more often in DirectX, anecdotally

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