Assigning Loads To Frames
Assigning Loads To Frames
(OP)
I want to run a space frame with and i dont know how to apply uniform loads on the beams.i used rectangular shell elements with very very small bending thickness (0,000000001.Are the uniform loads assigned correctly to the beams this way





RE: Assigning Loads To Frames
RE: Assigning Loads To Frames
Diquan
RE: Assigning Loads To Frames
RE: Assigning Loads To Frames
The Straus7 does it because is one element that you define and has no property, it only transform uniform surface load into uniform beam loads.
Maybe i have seen it in etabs, i will respond you soon if such a thing is possible with etabs.
RE: Assigning Loads To Frames
p.s sorry for my english!:)
RE: Assigning Loads To Frames
RE: Assigning Loads To Frames
Diquan
RE: Assigning Loads To Frames
RE: Assigning Loads To Frames
"Note that you don't have to divide the frame, you can draw special joints using the 'snap to line' or offset options"
I do not understand ?
RE: Assigning Loads To Frames
Why would you want to draw special joints instead of dividing the frame? Imagine 8 meter long girders intersected with secondary beams (or intersected by floor system mesh modeled with shells or whatever). You can draw special joints on girders then use those joints to draw and connect those secondary beams. SAP will internally divide the girders to handle load transfer between the girder and secondary beams, but it will report results and design the girders using their true 8 meter length. Whereas if you 'divide' the girders to do this, you would have maybe 4 or 5 or more different moment diagrams representing 1 girder, making design more difficult.
RE: Assigning Loads To Frames
RE: Assigning Loads To Frames
Using special joint such we have describe by giving the offsets for joints one by one, for this purpose need a lot of time. Especialy when we have a complex or a big structure.
RE: Assigning Loads To Frames
RE: Assigning Loads To Frames
RE: Assigning Loads To Frames
Any kind os shells introduces in the model restictions, and the displacements of the structure is't no happens if you put load as de usual method.
I'm still working.....
RE: Assigning Loads To Frames
I have a question about slab-beam connections.
I am trying to model a slab using shell elements and the interior and edge beams using frame elements with rectangular sections. This is what I have tried-
1) Offset the beam neutral axis.
2) Then, divide the slab into smaller slabs (1/4 x1/4.
3) Create joints in the beams by replicating the slab joints (-dz).
4) Select individual slab edge joints and corresponding individual beam joints, and apply body constraint (x,y,z,r1,r2,r3).
Questions:
1) Is this a correct procedure?
2) I had to create individual body constraints for each of the joints (12 in number for a 1story 1 bay x 1 bay RC slab-frame str.). I had to do this, otherwise the beam displacements will be the same along the length. How do I do it for a model with a large number of elements?
3) How do I create points/joints on the edges of the slab without having to divide the slab into smaller slabs?
Please let me know if more info is needed to answer these questions.
Thank you