Why did you assign the imperfection to the wind case only ? Should we assign to the gravity loads as well ? e.g.; Imp.+X ( Dead + Snow + Wind +X ) , thanks
Hi, @civilengineeringwitharas4776! Take a look at time 41:20. The relevant Wind Load Cases is selected for the corresponding imperfect. However, you'll notice the program will further consider all Load Combinations automatically (lateral and gravity Load Combinations) for this imperfection application. This is shown again at time 48:20.
@@DlubalEN Can we have a node that supports both the upper and the lower flange ? lets say we have a beam to rafter connection with full depth shear plate, in this case the beam can brace both the upper and the lower flange. I have tried but I think RFEM does not have such option.
By editing the intermediate supports of the middle rafter frames, does this will automatically adjust it's effective length from column to column, which is I think around 40 ft? So that the program will consider this 40 ft effective length in computing the strength capacity and serviceability requirement of the rafter beam?
Manually setting up the lateral support is time consuming when dealing with complex structures, can RFEN intelligently and automatically detect where those points are based on adjacent elements?
Hi, Alaa! RFEM 6 can detect nodes automatically along the length of a member. However, the program does not know the connection type. This is true for any FEA program. Therefore, the user must specify at each node which DOF are fixed/released/partially fixed. If you prefer to directly input the effective length (KL) for the unbraced lengths, you can do so under the Absolute Values option in the same dialog box and forgo manually setting the intermediate restraints along the member. Lastly, we suggest working with Member Representatives to quickly set and modify the intermediate restraints for members which belong to the same representative group. Hopefully this helps!
Why did you assign the imperfection to the wind case only ? Should we assign to the gravity loads as well ? e.g.; Imp.+X ( Dead + Snow + Wind +X ) , thanks
Hi, @civilengineeringwitharas4776! Take a look at time 41:20. The relevant Wind Load Cases is selected for the corresponding imperfect. However, you'll notice the program will further consider all Load Combinations automatically (lateral and gravity Load Combinations) for this imperfection application. This is shown again at time 48:20.
@@DlubalEN Thank you very much
@@DlubalEN Can we have a node that supports both the upper and the lower flange ? lets say we have a beam to rafter connection with full depth shear plate, in this case the beam can brace both the upper and the lower flange. I have tried but I think RFEM does not have such option.
By editing the intermediate supports of the middle rafter frames, does this will automatically adjust it's effective length from column to column, which is I think around 40 ft? So that the program will consider this 40 ft effective length in computing the strength capacity and serviceability requirement of the rafter beam?
Hi, Mr.!
After adjusting the design supports the effective lengths are changed automatically.
@@DlubalEN So by doing this so you don't need to make a set of members for the main rafters? Right?
Hi, Mr.!
Yes, you have to define the members from column to column and all nodes on it have to be nodes "on member".
Manually setting up the lateral support is time consuming when dealing with complex structures, can RFEN intelligently and automatically detect where those points are based on adjacent elements?
Hi, Alaa!
RFEM 6 can detect nodes automatically along the length of a member. However, the program does not know the connection type. This is true for any FEA program. Therefore, the user must specify at each node which DOF are fixed/released/partially fixed.
If you prefer to directly input the effective length (KL) for the unbraced lengths, you can do so under the Absolute Values option in the same dialog box and forgo manually setting the intermediate restraints along the member.
Lastly, we suggest working with Member Representatives to quickly set and modify the intermediate restraints for members which belong to the same representative group. Hopefully this helps!