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Dear all, I came across a document mentioning the "Grenoble Method" for pile uplift verifications. I need to understand the method because we were asked to used it in one of our projects for guyed mast foundations. However, I found very limited information online, and a vague reference to an...

HDStructural, I am not sure if I explained the issue clearly. What you are describing is the common use case. I am wondering about the seismic behavior of this building (under lateral loads). Is it common to design the steel roof as a diaphragm to distribute the horizontal loads to the vertical...

Hi, I am designing a reinforced concrete building with a steel flat roof. From my calculations, it seems beneficial for this building to have a diaphragm at roof level, but here is the question: is it feasible to design a steel roof as a diaphragm? Usually, due to temperature or other factors, I...

I am retrofitting an existing building that is composed of highly irregular independent blocks. If I merge some blocks together (eliminating some of the joints), the structure becomes quite regular in plan. The joints are spaced at roughly 30m. The question is, what should I have in mind while...

In Europe, I don't think SHM techniques are codified. I expect the same for other parts of the world, as this is something very special. I have some experience with SHM through computer vision and ambient vibrations, but this is not something I do often.

Could you explain a bit more what you mean by ? I think the soil is perhaps beneficial only when compressed and an nonlinear analysis full of uncertainties is required to model this correctly. Am I right? You are right, I am using Eurocode 8. My building is irregular in plan, not only due to...

I am sorry, I was not clear. If I add an equally stiff wall on the open side, of course I can avoid the torsional modes, but I just can´t due to architectural constraints. I tried to add quite large, but separate, walls on the open side but they are no match for the enormous length wall on the...

I am trying to retrofit an existing 4 story reinforced concrete building with a typical plan as shown below. The thing is, it has a very long wall on one side, retaining the soil behind, and a very flexible structure over the rest of the floor plan. When I tried to balance the stiffness of the...

Please clarify what you mean. What is the purpose of the SDOF system? What do you need? What software do you have in mind? What is this for?

Why not model the entire structure? You could use shell elements for walls. In Eurocode 2, you have clear answers regarding your questions (I don't remember the answer by heart, but the code indicates how to take the clear span of beams supported on walls and other elements).

Good answers here already. I would like to add that perhaps you could use a tool like the one described in the video below to help you with this issue: https://www.youtube.com/watch?app=desktop&v=3kl4LHjAKio

Thank you for your answers! I forgot to mention in my original post that these are bonded post-installed anchors. Do you think using option "b2" is still valid for bonded anchors? I am thinking of leaving a portion of the anchor unbonded near the plate, but then I am afraid the code provisions...

Would you design the connection below assuming the concrete member width is b1, b2, b3 or something else (see figure below for explanation)? I couldn't find a direct reference in the codes about this situation. I am assuming b1 is overly conservative, considering that the concrete cones can...

Thank you for your reply! It is possible it is a miscommunication, but according to the electrical engineer, these are forces imposed on the structure, and the structure must be calculated to support these forces. EN 50341 does mention these forces, but leaves it to the National Annex to...

Dear all, I am a structural engineer, and the electrical engineer gave me the short circuit forces to be applied to the gantry structure. The trouble is that I can't seem to find any reference in the European norms about the consideration of these loads for my strucutral design. Do I consider...

Thanks structSU10, you are right, I hadn´t noticed. I will edit my post accordingly. I didn't find a hooked anchor though, only a headed threaded bar.

Hi, what apps do you use to design base plates for steel structures? Is there something you recommend? Any free tool available? I have been using several, but I find all of them limited to some extend. For instance: 1) Autodesk Robot Structural Analysis: I cannot specify additional...

Thanks, what about Eurocode, is there something similar to AISC 6.2.1 in Eurocode? I could find specifications only for lateral torsional buckling of purlins as a function of cladding, which is not the same issue.

For this specific task I would consider building my own tool (I normally do this kind of thing in python). I don't know all the software you mentioned, but I don't think any of them can do this kind of analysis.

Thanks for the reply! My cladding is very weak, so I am assuming 2L then... I was wondering about the roller issue. Why do you say the result is wrong if in reality there is no roller there? To me this is just a matter of statically determinate or indeterminate, not right vs. wrong. What do you...