masonry building problems
masonry building problems
(OP)
Hey everyone,
I am currently working on my master's degree thesis model of a masonry building with concrete slabs (portuguese "placa" building) so the slabs could be modeled as diaphragms, even though I decided to use thick shells to model it because of the different dead load cases. My problem is that when running the earthquake combination the deformed is completely wrong, like the building is split in two and with high shear deformation in-plane, even with diaphragms on the slabs this problem still happens (as seen in the pic).
Anyone have any idea why this could be happening? I applied area edge constraints where walls meet with slabs, I re-designed some of those shells, among other things.
Sorry for my english, it's not my native language.
Thank you in advance
I am currently working on my master's degree thesis model of a masonry building with concrete slabs (portuguese "placa" building) so the slabs could be modeled as diaphragms, even though I decided to use thick shells to model it because of the different dead load cases. My problem is that when running the earthquake combination the deformed is completely wrong, like the building is split in two and with high shear deformation in-plane, even with diaphragms on the slabs this problem still happens (as seen in the pic).
Anyone have any idea why this could be happening? I applied area edge constraints where walls meet with slabs, I re-designed some of those shells, among other things.
Sorry for my english, it's not my native language.
Thank you in advance





RE: masonry building problems
Also, try not to use area edge constrain, instead restrain the boundary condition by using joint restraint depending on boundary condition. In case you need to consider soil interaction, youse joint spring with appropriate stiffness in each direction. Lastly, make sure the automatic mesh option is not selected. It is safer to tell this guy (SAP2K) to divide the mesh by max size, in your case as it is huge building, I gues 1-0.5 should be fine.
Cheers
RE: masonry building problems
Thanks!
RE: masonry building problems
RE: masonry building problems
Rigid Body: fully rigid for all displacements
Rigid Diaphragm: rigid for membrane behaviour in a plane
Rigid Plate: rigid for plate bending in a plane
Rigid Rod: rigid for extension along an axis
Rigid Beam: rigid for beam bending on an axis
RE: masonry building problems
Cheers