ANSYS Tutorial Reinforced Concrete Beam (RC BEAM) - Static Structural
HTML-код
- Опубликовано: 22 авг 2024
- ANSYS Workbench Tutorial using Static Structural to model a RC Beam (Reinforced Concrete Beam). Failed elements or cracked and crushed elements are shown using the PLCRACK command. Deformation of the Rebar can also be outputted. This is a four point bending test of concrete.
Command Files DOWNLOAD: cutt.ly/DrDaly...
Mirror Link: tinyurl.com/yd...
![[TF2] The Russian Bear Trap](http://i.ytimg.com/vi/YFNSwz2_rOA/mqdefault.jpg)
That's a very nice video. There are not many RC examples done in Workbench. After some time, I was able to come up with a similar model (including command blocks), but it's really good to see we are on the same track!
Keep up the good work and thank you!
Igor
Thanks! If you improve the model and/or verify it with data please keep me posted!
Actually, I am analysing RC structures subjected to fire, which is basically this, but extended for higher temperatures (material data, linked thermal and structural analysis, etc).
We shall definitely stay in touch :)
Hello all. Thank you DrDalyO for this and more great tutorials! I also had the same error as many have mentioned here. The error goes like, "Switching to a different shape is not allowed while elements of ... Element type 1 is not the same shape as SOLID65." The solution is to select your concrete part and modify the mesh by doing the following: (1) right click on mesh, (2) select "method", and change the method to "multizone". Apparently SOLID65 elements should have such shape.
Hi, and thanks for putting up your concrete modeling videos. One comment on the static structural model that you have developed: Viewers should note that the coupling connection between nodes reinforcing rods and concrete by node coupling works only because of the element sizes and placement of the rods in the concrete block. You have done it so that you have coincident nodes in the elements of the concrete block and of the rods. Users will need to ensure that they use low-order bricks so that the SOLID65 bricks can be substituted. It will take more work for the "general case" in which the concrete is carved up into a multibody part so that reinforcing bars can be placed along edges of the bodies that are the concrete. With mesh density controls along the edges that are shared between the line bodies of the reinforcing bars and the concrete blocks, it should be possible to have coincident nodes that can be coupled with reinforcing bar locations that are not quite as restrictive. I am impressed with how smoothly and quickly you are able to present. Nice piece of work!
thank you for very interesting. Vedio ,,I hope is these are. available. ,, one Vedio. for. doubly reinforced. beam. also. thank you. for a nice last Vedio. about. all the ,topic of static sturcture ,,,continuo dr don't stop ,,many people are watting for you.
Thanks you so much for being more than helpful. God bless you!
Thank you DrDaylO for the video .
You have great tutorials! Can you continue making them please
Hi,
Can you make a tutorial of RC Beam/column with FRP? Really appreciate it.
Thank you>
i was about to ask this too. i think i can do that using staad but in ansys i dont know. 😅😅
Extremely helpful, I'm appreciating so much. Good luck for you!
Dear Dr, I ask you in recent version of Ansys workbench static , the bond slippage between bars and concrete can defined as built-in without command ?
Thanks you for your nice presentation.
Thank you!
These commands are not working can you explain it to me bit clear
this is the error which occur after solve
An unknown error occurred during solution. Check the Solver Output on the Solution Information object for possible causes.
I am having the same issue as well on the 2020 AnSys academic version.. I don't know the exact reason. Did you figure it out??
@@tekdhant3731 not yet but my guess it connection command which creating the problems
Thank you DrDalyO for the video! Sir, Are the commands used in this video applicable for lateral reinforcement as well? If not, what commands are to be changed ?
One correction in the video
the Solid65 and Link180 do not define the material, These are the element type that ANSYS will consider while solving the equations.
you are right they are element types than can then later carry material definitions
So good Dr.Dalyo
Thank you for the understandable tutorial.
R,MATID,12,,0
The 12 on the last line, does it represent the rebar radius, diameter or area? I saw a document were someone put in the rebar area instead.
Also, you put the concrete crushing stress value as 25 but the compressive stress from your data points for the concrete stress strain relationship is up to 30.
Please provide info on this.
Also, i modelled the same geometry on ansys 19.2, and after analysis the impactor on top slides outwards, but when i keep the contact as bonded, it stays.
Please help.
thank u very much .. I'm learning so much things from your videos .. please keep going :)
when i changed the stress strain table with high strength concrete the ansys did not solve
sir thank you very mush for the video you have no idea how i appreciate it
+Mazin Omer I am not sure whats the problem, but this model is not very stable as it is.. start by making small changes to my code to figure it out more easily.
I begin to use a uhpc.
mm/mm N/mm²
0,00000 0,00000
0,00173 75,00000
0,00184 79,29002
0,00196 83,98509
0,00208 88,27732
0,00220 93,04424
0,00232 97,32686
0,00242 101,32217
0,00255 105,37563
0,00266 109,08479
0,00275 112,06690
0,00285 115,02874
This TBDATA is based on real pressure tests (uhpc cylinder). If i exclude this
!TB,CONCR,MATID,1,9
!TBTEMP,22
!TBDATA,1,0.3,0.8,1.5,25
it works well. Now I am working on that coefficients to reach the crack/crush plots.
Only 4 digit decimal can be put on that command. I once face this issue too.
May you arrange stirrup rebar in order to learn how you provide bond between longitudinal rebar and shear rebar ?
Thank you sir for uploading this video, I am trying same analysis for another geometry but it shows an error :
*** ERROR
*** CP = 1.186 TIME= 11:47:34
Duplicate
temperature values were found. The MPTEMP command is
ignored.
please help me to get rid of these errors in this project.
Hello, I encounter the similar problem. Is there any solution for this problem? Your feedback is highly appreciated. Thank you very much.
Hello, I followed your guide step by step. I have tried for 2 days straight to solve this but the following warnings occur when trying to solve:
Poisson's ratio NU set for material 1 deleted.
Material property table exceeds the number of defined temperatures.
Number of temperatures is 1. The number of data values is 2.
Poisson's ratio NU set for material 3 deleted.
Material property table exceeds the number of defined temperatures.
Number of temperatures is 1. The number of data values is 2.
Poisson's ratio NU set for material 4 deleted.
Material property table exceeds the number of defined temperatures.
Number of temperatures is 1. The number of data values is 2.
Poisson's ratio NU set for material 5 deleted.
Material property table exceeds the number of defined temperatures.
Number of temperatures is 1. The number of data values is 2.
Poisson's ratio NU set for material 6 deleted.
And then a warning that: 'One or more bodies may be underconstrained and experiencing rigid body motion. Weak springs have been added to attain a solution. Refer to Troubleshooting in the Help System for more details.'
Can you please help me? I suspect either the command files are incorrect or something else. I have redone your exact steps multiple times and still get errors.
Thanks Dr.
i also having the same issue brother regarding to the warning. did you done it correctly? if so then please tell me how you did it?
Kindly regards
@@moeedshahid6193 me to. I used 2020 R1 and I cannot show the cracks
could you please do a detailed video on soil-structure interaction analysis and design of a building? that'd be very helpful
DrDalyO, I had previously tried out this tutorial during my PhD, but I was using APDL. I can provide some comments here, but I also have questions. 1) Your concrete stress-strain graph for concrete plateaus at peak strength but the real graph for concrete shows strain softening. As I know, v12 - v14 cannot model strain softening and I think that's why you had used the plateau here. Is the only workaround for this is to use Explicit Analysis? 2) Why was strain softening able to be modelled in v10 and earlier? Were v10 and earlier using a different solver or was that an ANSYS coding error? 3) What are the limitations in Workbench (WB) that requires one to revert back to using (parts of) APDL on certain situations? 4) Wasn't WB supposed to replaced APDL, so why do those limitations still exist in v18? Thanks.
Ok sir thanx for your good work.I will try it.
Thank you Dr Its perfect
Hello Dr Daylo,thank you for uploading the tutorial!
I want to know if I can still work on the Ansys workbench if I don't have the command inputs from solid work that you've mentioned then please let me know
Great video, thanks
Great video! Thanks!
Thank you!
Sir please explain how to give prestress to the beam
I have a problem
An unknown error occurred during solution. Check the Solver Output on the Solution Information object for possible causes.
One or more bodies may be under constrained and experiencing rigid body motion. Weak springs have been added to attain a solution. Refer to Troubleshooting in the Help System for more details.
Can you help sir..
i am also having the same issue . did you solve this ? if so then please tell me
Thank you DrDaylO for the video .
I'm new to Ansys and Is it possible to model and analyze the above without the command blocks?
Also, Is it possible to include bond strength between rebar and concrete in the analysis ??
Thanks.
because , I Need to know Carefully How to Make a good Contacts definition between main bars (top & bottom ) and links also contacts with concrete areas ,, in addition to make a good quality of mesh of Doubly Reinforced Concrete Beam ,,,Thanks Dr.
+MOHAMMED BADRI what is your question.
Hello, very nice demonstration. have you tried modeling a beam with cold joint? if the cold joint of the beam is inclined, how do you model an inclined surface how do you bond the two concrete surfaces? thank you very much
I have not actually..
awesme job, thanks man
How about modelling stirrup reinforcement to hold back shear effect? please help
I have the same question
Awesome video! Thank you!
Dear DrDalyo, Thank you for this video. Can we use SOLID65 or other elements without using commands? It will be great if you or someone else answers that.
When i made this video, there was no other way to use SOLID65 in workbench. If you use APDL its available but the interface and post graphics processing is dated. Thank you for watching!
Hello Dear DrDalyo!
Thank you for this useful video.
Could u make a video for (shear Wall or RCC wall ) with biaxial loading, how would be deformation and cracks.
Thank u very much, waiting for the video.
Me too waiting for that plz
it is really helpful video thank you very mush
Also DR. when adding the commands: /PREP7
ESEL,S,ENAME,,65
ESEL,A,ENAME,,180
ALLSEL,BELOW,ELEM
CEINTF,0.001,
ALLSEL,ALL
/SOLU
OUTRES,ALL,ALL
Do you not have to change the 'ENAME' to something else? Such as the Support so the errors do not show up?
Hello Dr Dalyo... Thanks for the video, it's been helpful. Can you please advise me on how to model prestressing in workbench assuming the same model was prestressed concrete beam. how would I add a prestressing force to the rebar.
This tutorial is awesome. Thank you so much. I have 1 question, did you ever calculate rc beam strenght by FRP sheet?
I want to solve this problem using ANSYS, using analytical method and in natural experiment. So Im open for all advices))
at last..my request has come along.....
+nikhil sharma Dear Nikhil Sharma,
Do you manage to do you?
sir ,plzz do design beam column joint design and anlysis
Dear Dr. DalyO , we are working on diffirent project ( dam design). Our problem is about solution because we have error message all the time (ERROR MESSAGE: the solver engine was unable to converge on a solution for the nonlinear problem as constrained ) . Thanks for your interest.
Really helpful video..
I want to check a sandstone behaviour can I approach in the same way ?
Dr DalyO, thank you for this very helpful video. You have mentioned that there are other tutorials that do similar static modelling for concrete/rebar from within Ansys APDL - could you point me to these tutorials please that you refer to when you get an opportunity. From APDL, I am presently endeavouring to model concrete/rebar with stirrups (eventually studying the effect of openings within the concrete beam); I have come across a few relevant tutorials using APDL but would appreciate if you or any of the community could point me to other relevant tutorials (using the APDL development environment please). Many thanks
Thank you DrDalyo for such a useful video. However I have a question that, is it necessary to use command?
I have a question. I'm doing my project on magnetorheological shear thickening polishing for brittle materials. However, I'm doing simulations with ANSYS software for CFD, and I have obtained satisfactory results. But for static structure, I want to check when cracks and fractures will occur and how the penetration of grits or abrasive particles could impact this. Could you please help me with this?
hello Sir ,can you kindly tell me what is the impactor you are talking about?Is it load?Aso will the be same for all RCC structure?
Meaning the location of where the load is applied
I think to avoid error in solution as appear when use solid65 for beam models , should choose dropped mesh for element midside nodes
Hi Dr ur video was so helpful for me just one more thing can u explain more about Concrete and Rebar commands and thank you so much
Can you create a new reinforced concrete tutorial using Ansys R19 please? R19 has a weird interface and tools are different.
I went through this example with R14 version (that's the only old version I could find). And I got these two errors:
- "An unknown error occurred during solution. Check the Solver Output on the solution information object for possible causes."
- One or more bodies may be underconstrained and experiencing rigid body motion. Weak springs have been added to attain a solution...."
I did exactly what you have shown in this video, but it is giving some warnings about poissons ratio in the Solver Output.
Thanks,
Baha
I got the R19 as well, I'm interested in compressed reinforced circular columns if you can help
I got the R19 as well, I'm interested in compressed reinforced circular columns if you can help
You can change the screen from space claim to design modeler, so that it wont be weird.
Thank you DrDaylO for the video .
I'm new to Ansys and Is it possible to model and analyze the above without the command blocks?
Also, Is it possible to include bond strength between rebar and concrete in the analysis ??
+amr ali it is possible, but you must do it in APDL
how to made it in APDL
I have the same question, the command objects don't work in my model, and I hope there is a way to enter the elements types and material properties by APDL and continue all the other steps in Workbench. I would be very grateful if you helped me
funny thing happening to my model when i add APDL. the force i apply is in Possitive Y while the deformation i get is in the opposite direction.
Dear DrDalyO,
Thank you for uploading this useful video. Expecting more informative tutorials like this.
Can you please send me the link to the entire report of NGUYEN ?
Thank you,
Regards.
Dear Dr DalyO
How can I obtain crack formation by time of analysis?
Thank you in advance.
thank u Dr for ur interesting kindly I want to ask what about pretension prestressed concrete or posttension concrete its possible to modeling it by ansys ? and if we did hole through the concrete and but in these hole beam element as tendon and bonded between them it will work ?
+Ahmed Al-dean i am not familiar with pretension or prestressed elements for this example sorry. It should be possible, please see the ansys help online.
Hello DrDayl0, could you remake this video using Ansys 19?
PLEASE DO SO
Can we use the commands for inserting only materials. I only have to input concrete material so will the command for concrete part be sufficient Or should I also add code in static structural and solution part as well?
Depends, if you are not joining any stirrups then you can just input the command in materials. You do not then need code for static structural. However if you want to display the crack/crush plots then you need commands for solution.
@@drdalyo I used the concrete part of code and inserted stress strain values I got from my experiment results (83 ) values are there. And I changed the Young's modulus value as per my requirement but the code is showing error when I ran the file
@@aakashshukla3340 yea the code is very specific so maybe try to keep the number of table data points the same and see. you need to possibly modify some lines of code also.
I have a problem my geometry is complex so it's a tetra mesh is there any way to use the same command the solve is give me error because of concrete elements
how to model stirrups
in RC beam
Thank you for the grat example, sir. I repeated it step by step and received the same results, which is good. But i couldn't receive the stress in the rebar. Is it possible in this way?
+Techcrafter You would need to use more command objects do get these results. I probably should have included this in the tutorial. In the Solution(A6), right click and add command object, insert the following code to see axial force and stress results for the beams:
/SHOW,PNG
/VIEW,1,1,1,1
allsel
ESEL,S,ENAME,,180
ETABLE,Force,SMISC, 1
ETABLE,Sxx-i,LS,1
ETABLE,Sxx-j,LS,2
PLETAB,Force
PLLS,Sxx-i,Sxx-j
allsel
+DrDalyO It worked for me, thanks!
Hi..... I got the force and stress results but cannot interpret its meaning. Are these von-mises stresses or axial stresses? Also what are the units of these forces and stresses?
hi i also repeated it step by step but i didn't receive the same results. Techcrafter could you please help me on this ??
Thankyou Dr Dalyo for the well explained tutorial, although when I tried to replicate the things some errors are appearing like- "one or more bodies may be underconstrained and experiencing rigid body motion. Weak springs have been added to attain a solution." Please tell me if you have any idea about how to overcome such error. Thanks
+rishabh shotri im not sure if this resolves that error, but i remember that i did forget to drop element midside nodes i believe when recording. Check the comments, someone else posted about it. If doesnt help, post another comment here
I am sorry, I didn't understand, I mean what exactly "drop element midside nodes" means. I do have checked for other comments, but unable to find the solution to the error. Thanks
Go to Mesh->Defaults->Element Midside Nodes-> Program Controlled/Dropped/Kept
Can you please create a post-tensioned RC concrete beam model simulation. How to simulate the cable that compress and cause bend of a beam
Fatigue analysis in abaqus using beam model
I believe that at 8:49 a recall is needed, for 12 is an area , not a radius . R meaning a real mumber?
Realy very nice vedio
+Sunil Chopdekar thanks!
please how to define the concrete behaviour in details in workbench?
how to define the bond slippage betweeb bars and concrete by combined element ?
+Abdalla Mahzouz i think by using COMBIN39 elements.. Someone else had this question but I do not know too much about this element. Please look in the help for more detail on this element type.
Hello, COMBIN39 for single F-D curve and MPC184 (translational joint) for multiple F-D curves dependent on temperature.
Thank you for this video. I tried the example out but got 40 of errors stating "Constraint equation xx has unused node 3581" where xx is a number in the range 1-40. Any assistance to solve this will be appreciated
Same for me also.. please help me to rectify this error
While solving it shows an unknown error occurred during solution ansys
Kindly help i am solving in ansys 2024 student version
Am getting an error messege, says tb,plas is no longer supported for solid 65 element.
+Vishnu SNair what ansys version are you running?
Where can i get these infos which are included in Command file ?
Must commands be added for like these analysis? Why did we enter that?
I'm looking forward for the answers. Very educating video. Thanks sir !
please see the description of the video for the command file. Yes they must be added in workbench, if you use APDL then you can do it there also.
If we model reinforcement by slicing the concrete material and provide a bounded contact with the concrete, would it be right ?
"An unknown error occurred during solution. Check the Solver Output on the Solution Information object for possible causes."i want help as i have this error message
i am also having the same issue . did you solve this ? if so then please tell me
Bro u amazing
it is excellent video. sir i want to make tapered rcc beam or haunched beam so how to give non linear section to the beam and how to make model and how to give material like concrete and rebar
''Node 4 does not lie on or near the selected elements. The CEINTF
operation produced no results for this node." I have this warning... do you have any idea what is happening?
Thank you for the tutorial. I have a question. How to match the nodes of concrete and the ones of rebars, if the rebars are positioned random in the section? Thanks!
Hi, I can see concrete material in Ansys workbench 2023. Is it okay to assign that concrete to my reinforced concrete beam?
An unknown error occurred during solution. Check the Solver Output on the Solution Information object for possible causes.
i found this error in workbench solution please solve it
have you found any solution???
NO
2021 R1 workbench allows to define MISO tabular data for the material. Does that mean using APDL command isn't necessary?
Thank you Dr.Dalyo very much for the video. I used the geometry file from your last video since it includes shear reinforcement in it. I changed the APDL code for rebar by changing the radius of the rebar appropriately. But I get an error,"Node 1578 belongs to element 124. The CEINTF operation will not consider this node/element combination" and this error continues to the rest of the nodes. Can you please help me ? Should I change the APDL code elsewhere or if else where should I ? Would be much appreciated if you could help me ?
+Sivaraman Kiran It might be because the mesh nodes do not line up nicely with the rebar. try to space the rebar evenly, so when you go to create a mesh, the element size will be a multiple of the rebar spacing so the nodes will line up. if the rebar nodes and the concrete mesh nodes are not close, you might get errors.
+DrDalyO thank u very much for ur valuable video as well as ur response. Much appreciated for u work on Ansys
Thank you sir for uploading nice video,sir my question is ,can i make a model of fibre(steel fibre,polypropyline fibre) reinforced concrete beam in Ansys software,if possible can you upload this video,
+Prasenjit Saha I have the same doubt... Did you get the solution to that ? I want to design a carbon reinforced concrete beam ....
no sir,sir if you want to wrap the beam with carbon fibre than it can be possible,some videos are available in the youtube,otherwise try in ATENA software
Prasenjit Saha I am also having the same problem as you have to create a hybrid (pp+steel fiber) rc beam with reinfo could we solve it in ansys WB
Prasenjit Saha how to define the fiber random distribution in ansys workbench if we use the fiber reinforced concrete? Have you gone through this problem?
I think you can assign the concrete material bodies as element Solid65 and use its real constant, which allows you to model smeared reinforcement
thank you Dr for video but I have a question1-it is possible use explicit dynamic as static analysis ? because its more easy for reinforcement contact definition
+Ahmed Al-dean it is possible, but not easy. you would need to use something called Dynamic Relaxation, and its only available in one of the latest versions of ansys.
+DrDalyO good question though!
Hi, want to ask. If i click the solution for maximum principle stress, the impactor is moving out from the body (concrete). why? can we lock it so that it cannot move?
sir , Can you make video on drop weight impact analysis on reinforced concrete slab/ beam and also crack pattern analysis. Really appreciate it.
Thank you.
Hey, I found your video really useful and helpful, but I was wondering if in the current ansys version there is a new way to introduce the interaction between the concrete and the steel, since there has been a lot of changes in the software since 2016, or if we still need to input a command. Im doing my college final project on ansys with a concrete beam, but im having a hard time with the interaction between the two materials.
Hi Bianca! Thanks for watching. To my knowledge I do not think they added any new features on this since then. I know its a bit of a pain but I believe using commands is still the best way. You can check my comments in the video, i believe some people posted some useful tips or even corrected some things i missed during the video. You can also email me. Best of luck!
@@drdalyo thank you!!!
@@drdalyo i sent you an email 😊, the one that's in your channel description
Please tell me how to fix this error.."AN unknown error occurred during solution. Check the Solver Output on the Solution Information object for possible causes".???
Thank you for this tutorial, it's help me a lot to use ANSYS Workbench.
But i don't understand one thing, why you use the commend APDL for stress-strain relationship, and didn't put them in engineering data?
Can i put the stress-strain relationship in engineering data? because i have to model a frame under lateral loads
why is it so important to make connection (that we did before meshing) ? is it always required to make connections when multiple bodies are involved?
Dear Dr, for Ansys 2021 R2, can we use the same method to assign the element type and material model as shown in this video? I mean you assign command for each of the geometry element. Thank you
hey dr thanks for this useful tutorial i just want to know that how to expand the symmetry to view the full beam
thanks and regards
Sir,I have a doubt.solid65 element is used for concrete . It is used for all grades like m25, m30 and so on....so how could I particularly use it for a specific grade?should I have to alter it's command
Thank you sir for uploading this video. I have doubt in concrete slab testing i analyse a slab with reinforcement and without reinforcement but the result for the both model is same. Sir pls help me in that problem
Thanks for sharing!
Hi dear friends, thanks for uploading helpful videos. I need to model a circular concrete column wrapped with carbon fiber and loaded vertically to exert axial pressure to see how it behave
Thanks
Thanks alot DrDaylO for all helpful videos.
If you do'nt mind asking few questions..?
Can I add a bottom layer of FRP sheets? if yes ? how can I match the sheets with concrete (couple)?
finally >>
@ 11:03 why you choose this value "0.001" ?
+muneerzero Hi,
Could you do that ?
how can i specify that the comands for the stress-strain curve are for compressive or tensile stress only ? concrete doesnt have the same stress-strain curve for compression and tention and i need to input both curves. How can i do that? I mean the command you used was for compression or tention ?