Hello CEE, I agree that the “Load Takedown Analysis” in Robot is not necessarily a new thing and that most of the results it provides had essentially always been possible and available through using other techniques in Robot. Despite this, I still think that the “Load Takedown Analysis” is a useful and convenient tool to have. For me, it is like having a “reasonably quick and fairly reliable” reference that one can use to check the “sense” and “the order of magnitude” of one’s work compared to that same work detailed model and analysis results. The following may be helpful: I order to avoid having to redraw or having to create a new model from scratch in cases where one desires to switch between various “structure models types or systems”, one can simply do the switch directly from an existing model of another “structure type” by going to menu Geometry>Structure Type… and choosing the desired structure model type or system that the current opened model is to be converted or to be changed to. For example, the above can be used to switch back and forth between say “3D building Design” and “Load Take Down Building Design”] I also read in one of the comments where a viewer/subscriber indicated that they could not find “moving loads” under the loads menu. This would most likely have been because their model was in a “structure type or system” that is not equipped with the “moving loads” menu option …. switching the model to say “Frame 3D Design” and then modelling and defining those “moving loads” there before switching back to say “3D Building Design” is one possible way to resolve that issue. Thank you for the videos, they are a bliss. Kind regards, DK
Hello there dear Engr. DK! sorry for the late reply, I was overbusy with tons of work in my FT job and was barely managing to record some videos and push them out. I agree, Load Takedown seems a rehash of what is possibly previous RSA but repackaged in a quicker way. Also, totally agree with your point of having it as a preliminary design and feasibility check. The suggestion of changing the analysis type is AMAZING! I usually never dare to do this because previously, (2010ish) it was a switch from 2D to 3D which included all kinds of new degrees of freedom. This "fear" of switching seems to be in my subconsious so far. Still, I totally agree with your suggestion, I just want to add that once you switch, you have to make sure that your slab model aligns with the load take-down analysis. Oh! So there is a way of adding moving loads, but it is kind of like a hack. Let me try it. Update! OMG it does work! I will screenshot your comment and post it as a post right away. Thank you very much! You are the best Regards, CEE
Hi Really thankful for your helpful videos about modeling and designing in Robot. I definitely would not find any better place or a person to teach me this than your channel. You are a hero🔥
Oh that is amazing to hear! That is exactly what I envisioned when I first created this channel. I want to provide this knowledge on a free platform like youtube to people who are interested. Thank you very much for your comment, it means the world to me. If possible, plz suggest this channel to your friends, it helps immensely. Regards, CEE
Hello Dr. CEE i follow the bridge series religiously and i cant wait for the next video. Addittionally could you please make a video for designing box culverts, expressing the truck load as an approaching surcharge is abit tricky, kindly step in.
I am going to speed up the bridge series, so expect this to be covered very soon. Thank you very much for sticking around, and expect more videos as we go. If possible, plz share this channel with your friends. It helps a lot ^_^
Hi, very nice video. Is it possible to create a video for how to analyze folded let's say 3mm steel angle to establish stresses and deflections? Thank you
Hi there and thnx for your comment. Not sure what you mean, do you mean that you want me to analyze a folded plate slab structure? pls feel free to clarify what you mean or even add a link to show what you mean. I will gladly look into it. Regards, CEE
Thank you for coming back.Not a slab.let say you have horizontal rail 3mm thick and folded right angle with legs length 50x50mm which is support cladding,I would be interested to see how to analyse this rail with dead loads and wind loads
hm.. I need to really think about it. It may be actually interesting in pedestrian bridges, where you have a side wall "glass" supported by some aluminum or metallic profiles. This side wall would be under wind loads and thus might be a cool question to dive into. I will try my best to find time for it. However, at the moment, you can see that we are covering a lot of video series, so plz remind me of your request once the bridge series concludes. All the best, CEE
Hi dear CEE, i got the feeling that autodesk does not put so much effort into rsap anymore, but im not worryied because the software is already complex enough to surpass the average structural job orders, so thats why i think rsap could be so delightful, thank you so much teacher!
Hi there Engr. Candea I think I share the same feeling, I guess you can't improve something that is so well crafted ^_^ you are most welcome. Sorry for my late reply, I had some intense working week behind me.
I will keep that in mind, but currently I have the bridge, pile and non-linear series running, so I am kind of out of time. Will definitely give it a go once I get a breather ^_^ Regards, CEE
Good. Waiting for that raft part. I think raft is also an elephant in the room cause it seems FEM have a challenge with singularities. Btw CEE, which is the best stiffening method? rigid diaphragm or a flexible one?
Rigid vs flexible diaphragm is not really a complicated issue. The thing is: if the axial stiffness of a slab is strong enough with respect to the axial loads on the slab (those would be horizontal forces) then it would work as a rigid diaphragm. A rigid diaphragm basically means that the nodes do not move horizontally with respect to each other, but only vertically (the usual deflection). I my opinion, a flexible analysis is the more accurate one, but there would not be a great difference between both. In case I mis-understood your question, please clarify. I would be glad to answer. With regard to the raft, the biggest elephant in the room is indeed the stress concentration that will be under the column on the raft. Because according to the FEM, with a single node being the connecting point between the column and the raft, you would have a high stress concentration (almost a needle on paper scenario) I will try to find a way around the limitation. Or at least explain how to interpret it. Regards, CEE
@@CivilEngineeringEssentials you got my question well Dr and thanks for the insights. Well understood. Waiting for the raft part. Will highly appreciate. May God bless you
@@CivilEngineeringEssentials Hello CEE? how about adding a rigid zone on top of the column? Won't that solve the flat slab/raft nodal stress concentration?
14:20 I found an anti-virus 😁 Geometry > Properties > Panel Calculation Model ! And just delete from there 🙌 yay! Robot does have some layers such as this; like the Sections catalog that populates when you add Beam/Column
Hi, sir thanks for this i would like also if you could take us thru some FEM basics using ABAQUS so that its easier to get the take aways as structural engineers, regards
That is an interesting suggestion, I think I will do that. But for now, I am currently overloaded with the series I am running on this channel at the moment: 1) Bridge Design 2) Autodesk Bridge Structural Design 3) Highrise building 4) regular Robot videos 5) Non-Linear FEM but I will keep your suggestion in my mind once I have some breathing room. Still, thank you very much for your comment, I really appreciate it. Regards, CEE
@@CivilEngineeringEssentials , thank you so much sir for your feedback i had also finished my design about solar panels i would like maybe to share with you the report so that maybe you get some time you can go thru. I will need your mail adress so that its easier to forward it. With you what i like its because all those bulk and unbreaked engineering knowledge , looks easy and fluid. You just get time to seat and watch and you understand everything. Thanks for the great work cause u do stimulate our mind to think beyond. Also the bridge design is the part that i want to master cause i am seeing opportunies into it. I am greatfull for your good work. 🙏
You are most welcome. the email is: civ.eng.essentials@gmail.com I will try my best to read it promptly, but no promises ^_^ Sorry for the late reply, I was uber-busy with my fulltime job ^_^
Hello CEE,
I agree that the “Load Takedown Analysis” in Robot is not necessarily a new thing and that most of the results it provides had essentially always been possible and available through using other techniques in Robot. Despite this, I still think that the “Load Takedown Analysis” is a useful and convenient tool to have. For me, it is like having a “reasonably quick and fairly reliable” reference that one can use to check the “sense” and “the order of magnitude” of one’s work compared to that same work detailed model and analysis results.
The following may be helpful:
I order to avoid having to redraw or having to create a new model from scratch in cases where one desires to switch between various “structure models types or systems”, one can simply do the switch directly from an existing model of another “structure type” by going to menu Geometry>Structure Type… and choosing the desired structure model type or system that the current opened model is to be converted or to be changed to. For example, the above can be used to switch back and forth between say “3D building Design” and “Load Take Down Building Design”]
I also read in one of the comments where a viewer/subscriber indicated that they could not find “moving loads” under the loads menu. This would most likely have been because their model was in a “structure type or system” that is not equipped with the “moving loads” menu option …. switching the model to say “Frame 3D Design” and then modelling and defining those “moving loads” there before switching back to say “3D Building Design” is one possible way to resolve that issue.
Thank you for the videos, they are a bliss.
Kind regards, DK
Hello there dear Engr. DK!
sorry for the late reply, I was overbusy with tons of work in my FT job and was barely managing to record some videos and push them out.
I agree, Load Takedown seems a rehash of what is possibly previous RSA but repackaged in a quicker way. Also, totally agree with your point of having it as a preliminary design and feasibility check.
The suggestion of changing the analysis type is AMAZING!
I usually never dare to do this because previously, (2010ish) it was a switch from 2D to 3D which included all kinds of new degrees of freedom. This "fear" of switching seems to be in my subconsious so far.
Still, I totally agree with your suggestion, I just want to add that once you switch, you have to make sure that your slab model aligns with the load take-down analysis.
Oh! So there is a way of adding moving loads, but it is kind of like a hack. Let me try it.
Update! OMG it does work! I will screenshot your comment and post it as a post right away.
Thank you very much! You are the best
Regards,
CEE
Hi
Really thankful for your helpful videos about modeling and designing in Robot.
I definitely would not find any better place or a person to teach me this than your channel.
You are a hero🔥
Oh that is amazing to hear!
That is exactly what I envisioned when I first created this channel. I want to provide this knowledge on a free platform like youtube to people who are interested.
Thank you very much for your comment, it means the world to me.
If possible, plz suggest this channel to your friends, it helps immensely.
Regards,
CEE
Hello Dr. CEE i follow the bridge series religiously and i cant wait for the next video. Addittionally could you please make a video for designing box culverts, expressing the truck load as an approaching surcharge is abit tricky, kindly step in.
I am going to speed up the bridge series, so expect this to be covered very soon.
Thank you very much for sticking around, and expect more videos as we go.
If possible, plz share this channel with your friends. It helps a lot ^_^
Hi, very nice video. Is it possible to create a video for how to analyze folded let's say 3mm steel angle to establish stresses and deflections? Thank you
Hi there and thnx for your comment. Not sure what you mean, do you mean that you want me to analyze a folded plate slab structure?
pls feel free to clarify what you mean or even add a link to show what you mean. I will gladly look into it.
Regards,
CEE
Thank you for coming back.Not a slab.let say you have horizontal rail 3mm thick and folded right angle with legs length 50x50mm which is support cladding,I would be interested to see how to analyse this rail with dead loads and wind loads
hm.. I need to really think about it. It may be actually interesting in pedestrian bridges, where you have a side wall "glass" supported by some aluminum or metallic profiles. This side wall would be under wind loads and thus might be a cool question to dive into.
I will try my best to find time for it. However, at the moment, you can see that we are covering a lot of video series, so plz remind me of your request once the bridge series concludes.
All the best,
CEE
Thanks
Hi dear CEE, i got the feeling that autodesk does not put so much effort into rsap anymore, but im not worryied because the software is already complex enough to surpass the average structural job orders, so thats why i think rsap could be so delightful, thank you so much teacher!
Hi there Engr. Candea
I think I share the same feeling, I guess you can't improve something that is so well crafted ^_^
you are most welcome. Sorry for my late reply, I had some intense working week behind me.
Could you do a tutorial modeling a structure with Eurocodes?
I will keep that in mind, but currently I have the bridge, pile and non-linear series running, so I am kind of out of time. Will definitely give it a go once I get a breather ^_^
Regards,
CEE
@@CivilEngineeringEssentials Thank you brother. You are the man. looking forward to those series. Keep doing the lords work.
Good. Waiting for that raft part. I think raft is also an elephant in the room cause it seems FEM have a challenge with singularities. Btw CEE, which is the best stiffening method? rigid diaphragm or a flexible one?
Rigid vs flexible diaphragm is not really a complicated issue. The thing is:
if the axial stiffness of a slab is strong enough with respect to the axial loads on the slab (those would be horizontal forces) then it would work as a rigid diaphragm. A rigid diaphragm basically means that the nodes do not move horizontally with respect to each other, but only vertically (the usual deflection).
I my opinion, a flexible analysis is the more accurate one, but there would not be a great difference between both.
In case I mis-understood your question, please clarify. I would be glad to answer.
With regard to the raft, the biggest elephant in the room is indeed the stress concentration that will be under the column on the raft.
Because according to the FEM, with a single node being the connecting point between the column and the raft, you would have a high stress concentration (almost a needle on paper scenario)
I will try to find a way around the limitation. Or at least explain how to interpret it.
Regards,
CEE
@@CivilEngineeringEssentials you got my question well Dr and thanks for the insights. Well understood. Waiting for the raft part. Will highly appreciate. May God bless you
@@CivilEngineeringEssentials Hello CEE? how about adding a rigid zone on top of the column? Won't that solve the flat slab/raft nodal stress concentration?
@@CivilEngineeringEssentials i think he meant a rigid zone
14:20 I found an anti-virus 😁 Geometry > Properties > Panel Calculation Model ! And just delete from there 🙌 yay!
Robot does have some layers such as this; like the Sections catalog that populates when you add Beam/Column
it is very weird, but if it works, then well, it works ^_^
Hi, sir thanks for this i would like also if you could take us thru some FEM basics using ABAQUS so that its easier to get the take aways as structural engineers, regards
That is an interesting suggestion, I think I will do that. But for now, I am currently overloaded with the series I am running on this channel at the moment:
1) Bridge Design
2) Autodesk Bridge Structural Design
3) Highrise building
4) regular Robot videos
5) Non-Linear FEM
but I will keep your suggestion in my mind once I have some breathing room.
Still, thank you very much for your comment, I really appreciate it.
Regards,
CEE
@@CivilEngineeringEssentials , thank you so much sir for your feedback i had also finished my design about solar panels i would like maybe to share with you the report so that maybe you get some time you can go thru. I will need your mail adress so that its easier to forward it. With you what i like its because all those bulk and unbreaked engineering knowledge , looks easy and fluid. You just get time to seat and watch and you understand everything. Thanks for the great work cause u do stimulate our mind to think beyond.
Also the bridge design is the part that i want to master cause i am seeing opportunies into it. I am greatfull for your good work.
🙏
You are most welcome. the email is: civ.eng.essentials@gmail.com
I will try my best to read it promptly, but no promises ^_^
Sorry for the late reply, I was uber-busy with my fulltime job ^_^