Three Sided Masonry Wall Open Front structure with Stiff Diaphragm

[Rajshrn]

I have got a 4 storey masonry shear wall building, which is sort of like an open corridor type structure with walls on only 3 sides. I have attached a layout of the structure. Evidently, I have more than adequate walls in the y-direction to brace my structure and just enough in x-direction. My floors are one-way spanning solid reinforced concrete slabs. With this type of structure, I am relying on my diaphragm to provide cantilevered action and transfer all y-axis seismic forces to the central walls. Would anyone have any reference materials on designing of these types of structures, or possibly a set of restrictions? The NewZealand code does not mention much about these types of structures. I am also getting first modes of vibration as torsion but my deflections are relatively low.

 

[JoshPlumSE]

When you say "central walls" are you referring to the walls at the center corridor which are really close to the center of the structure? Or, are you referring to the multiple interrupted walls just prior to the cantilevers? These are much closer to the perimeter of the building and would be a better location.