Hi all
I would like to apply a load of 200 kg on my gangway with a safety margin so 300 kg but the results I get seem wrong to me.
Could someone help me?
assemblage.zip
assemblage.zip
Hello
Several friendly remarks if you are willing to accept them on your simulations .
1°) No need to do the simulation on the complete footbridge because it makes the mesh too complex without any additional added value given the number of supports on the poles and in wall mounting.
2°) you use the beam mode for your frame while the grating cannot be treated as a beam. You have to switch all your objects to volume (the mixed mode does not seem possible in your case). Right-click on all "volume bodies" with the image of a beam. Select ==> Treat as volume.
3°) If the parts called "Support" are not welded on the "frame" in the platinum frame, your simulation will be wrong because the contacts between components cannot be "global contacts". If the frame is placed on "support" then you must have a contact of the type "on flat surfaces" with translations in X and Z (click ==> Fixed geometry then ==> advanced ==> "on flat surfaces" ==> Translation and choose 0 for the Z since you have not respected the XYZ in your assembly.
In one of your simulations, gravity is wrong because it is not placed with a downward direction but with a direction that goes towards what is assumed to be the wall (towards the "support" rooms).
AMHA There are too many errors in the different types of contact and worse some are redundant and SW is allergic to it. You can't say that all the objects are connected and put bolts in addition, for example. Saying that it's integral when obviously you have slippage or if you have welds between the "Frame" part and the "support" parts you have to make weld junctions.
Off-topic note (HS)
[HS ON]
There are some big design mistakes in my opinion
1°) the standards on this type of assembly are rather 5000 N/m² which takes into account the natural frequency and a dynamic load and the safety coeff).
2°) the "platinum frame" parts should not be in this place in addition I don't give much of the welds that would be made on two edges only.
3°) the connection between the longitudinal C-profiles (80x8) 10 m long and those used as crossbeams ((532 mm) are incorrect because your welds will not be consistent with the sizing of the C-profile. Why C-profiles by the way and especially of this type with slopes and radii everywhere.
4°) your galvanized grating rests on 100 by 100 by 100 galvanized tube posts and hold without any fixing, so here again apart from the error due to the design, you cannot say that they are solid contacts.
4 bis. You do not have a connection on the bottom of the posts with anchor type bolts. This has an impact on the buckling of the poles.
5°) For the load, it must be applied to the entire structure if you do not choose a simplified model because otherwise the forces of 2000 N on 1m² are distributed over other parts of the walkway so you will not know anything about the behavior of the columns, especially on buckling, or even spillage.
Note : You will tell me which supplier provides you with 10 m long C-bars.
[HS /Off]
Sorry to have been a little brutal on the surface, although benevolent towards you: but in short! everything would have to be reviewed from A to Z to make a simulation that holds up (possibly with a design in the rules of the art).
And above all, specify without exception all types of connections between the parts, the most important of which is the connection between the "support" parts and the longitudinal C-profile. This is important because you don't have any reinforcement gussets, or bracing. If there is a natural shift between "support" and the building, everything will end up on the ground and the pov's people with it.
Last remark, just as friendly, if I may say so: your frame being oversized, I would start by doing the simulation on the frame on its own to size it because don't forget that the gratings already have an intrinsic self-supporting structure.
Good luck :-)
Regards ZZ
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Hello
To follow up on Zozo_mp, I think we need to define what you want to size?
For me, there are 3 main and dissociable calculations:
- the holding of the "building" alone
- Holding a "support"
- buckling of a "post"
Indeed the placement of the "platinum" is quite surprising! At first glance, I would have placed the posts in front of a "node" of the "frame" which facilitates the positioning of the frames and increases the rigidity of the whole and the distribution of stresses.
But I don't know the constraints of your project.
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A little aside: which version of SW is needed to open the project?
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