Tilt Up Wall Deflection
Tilt Up Wall Deflection
(OP)
I'm looking for any information someone may have on determining the deflection, and more importantly the stiffness of a tilt up wall panel for an in-plane shear load. I'm currently working on a structure w/ 9" thick exterior, tilt-up, special reinforced concrete panels, and numerous interior special steel moment frames. I'm performing a lateral analysis of the structure, and am trying to determine how much of the seismic load ends up in the frames, and how much ends up in the walls. A typical individual wall panel is approximately 21' long and 30' tall, with numerous panels making up wall lines in the 42' to 300' range.
I've got a copy of the PCI manual which has info on the stiffness of the wall based on cantilever action. But, what I'm really wondering about is the composite action of the walls. How would one account for the connection of the panel to the foundation, and the individual connections from wall to wall.
Any and all information would be greatly appreciated.
Thanks,
Erik
I've got a copy of the PCI manual which has info on the stiffness of the wall based on cantilever action. But, what I'm really wondering about is the composite action of the walls. How would one account for the connection of the panel to the foundation, and the individual connections from wall to wall.
Any and all information would be greatly appreciated.
Thanks,
Erik






RE: Tilt Up Wall Deflection
RE: Tilt Up Wall Deflection
I think you are overanalysing this one. Look at the cantilevered panels individually and I am sure you will find that they are much much stiffer than the portal frame.
The distribution of load will largely depend on the diaphragm and will only really depend on the stiffness of the walls/portal frames if the diaphragm is rigid.
Getting composite action out of all the panels is difficult and (as hokie66 stated)can cause more problems than it is worth.
Think of the simplest possible option, and if it works then leave it that way. Only add complexity when the simple solution doesnt work.
csd
RE: Tilt Up Wall Deflection
Thanks in advance,
Erik