Hello,

Is it possible to model a continuous beam element with differing Beam IDs?
For example, I'm wanting to model a tied-back soldier pile wall which has a concrete-encased footing.
Model 1 - Bare steel: Works as intended. No moment-release/pin noted.
Model 2 - Concrete-encased footing: It doesn't work as intended. There appears to be a moment-release/pin at the junction.

Model Scripts:https://limewire.com/d/4aCod#W8E28xeGG1

Thank you for your help.

Hi,

You can create a continuous beam with different IDs by simply starting a new beam from an existing node of the previous beam. However, this approach doesn't work for tiebacks. Tiebacks are special beam elements generated using a closed-mode formulation, so they cannot be extended in the same way.

-Roozbeh

Thanks  for your response Roozbeh,

How is this achieved when using the "drawliner" command?
As "fromstrucnode" does not appear to be an option when drawing a beam element with an interface.

Thank you,
James

I am have the same question as James' when using "drawliner"

I've managed to connect beam one and two, but need to connect further to beam 3 and 4 (which interfaces with soil and rock dump)
I'd appreciate if you'll share, James, if you found the "hack" 

(I am not able to attach image...)

Hi, It might be possible if you divide the beam into multiple segments and connect the ends to existing nodes. I haven?t done it myself, but it?s worth trying.

-Roozbeh

Hi KnutF,

Unfortunately, I never found a solution to this problem.

Thanks,
James

Hi James,

Please upload your script here and provide a detailed explanation of what you're trying to achieve. I'll review your model and see if I can identify any potential solutions.

Roozbeh

Hi Roozbeh,

Thanks for taking the time to look at the scripts.
Please find the scripts attached.

Cheers,
JamesM

Hi James,

I reviewed Model 1, and based on my understanding, it seems you're trying to measure moment in the tieback or it's connection with other beams. If that?s the case, unfortunately, tiebacks can't be used for this purpose. Please note that tieback and cable elements are one-dimensional and do not carry moment?they are designed to carry axial force only.

Could you please confirm if that?s what you were intending?

-Roozbeh

Hi Roozbeh,

Please find linked a mark-up showing my intention - https://filebin.net/myum8oxgdefj22zk

I'm seeking a way to achieve moment continuity when modelling multiple beam elements with liners.
The problem occurs when transitioning from one 'beamid' to another.

Once again, thanks for taking the time to answer my questions and producing this impressive software.

Thanks,
James

Hi James, As I mentioned earlier, tieback elements are not standard beam elements?they do not carry any moment. Unfortunately, this means you can't use tieback or cable elements to achieve the continuity you're aiming for.

Hi Roozbeh,

You are misunderstanding the query.
I'm referring to the soldier pile element i.e. beamid 1 & 2 not the tieback element.
The issue is achieving moment continuity between the bare steel (beamid 1) & concrete footing (beamid 2) elements.
Please refer to https://filebin.net/myum8oxgdefj22zk for a visual explanation.

Thanks,
James

Got it. Unfortunately, at the moment there's no way to instruct the program to connect a new liner to an existing structural node to maintain continuity. However, that?s a useful feature to have. Let me think about it and see if I can come up with a way to give users the option to connect to existing elements. I?ll let you know once I?ve implemented a solution.

Hi James,

In the new release, I?ve added an option that allows users to choose whether to connect a new beam to an existing one. This feature is available for beam and liner elements that are attached either rigidly or through an interface.

The attached script includes a modified version of your model with moment continuity implemented. Please give it a try and let me know if you have any feedback.

Roozbeh

Perfect - Exactly what I'm after.
Thank you for being so helpful!