fredPE
Structural
- Apr 10, 2007
- 25
So a co-worker has a core wall at an elevator and stair on a six story P/T slab building going up in Seismic Design Category D. This is a crazy postage stamp sized building where the architect is trying really hard to make the floor plan work on a tight lot. On this building, on the first floor, we have a man door into the stair coming in on the south side of the core wall, and on levels 2 through 6, we have a man door coming in on the east side.
In our situation, we have the highly stressed end of the shear wall (with boundary elements) coming down on top of what amounts to a door header. I haven't spent much time thinking about it yet, but I am trying to brainstorm how that boundary element would affect that "door header" and what other design considerations there would be. Technically, the header is 5 stories tall, so its hard to imagine how exactly it could fail. It would seem that there would be a very strange shape of concrete right at the corner that the transition takes place that would have to take the compression/tension from the boundary element of the upper walls, and transfer it through shear into the end that in-frames at 90 degrees.
Does this sound like a killer problem? Or do you just have to check the shear on that weird shape of concrete to make sure that the forces on one portion of the wall can transfer over into the neighboring corner. Thanks for any ideas.
In our situation, we have the highly stressed end of the shear wall (with boundary elements) coming down on top of what amounts to a door header. I haven't spent much time thinking about it yet, but I am trying to brainstorm how that boundary element would affect that "door header" and what other design considerations there would be. Technically, the header is 5 stories tall, so its hard to imagine how exactly it could fail. It would seem that there would be a very strange shape of concrete right at the corner that the transition takes place that would have to take the compression/tension from the boundary element of the upper walls, and transfer it through shear into the end that in-frames at 90 degrees.
Does this sound like a killer problem? Or do you just have to check the shear on that weird shape of concrete to make sure that the forces on one portion of the wall can transfer over into the neighboring corner. Thanks for any ideas.
