Walls in rigid diaphragm with mezzanine
Walls in rigid diaphragm with mezzanine
(OP)
I am evaluating a single story reinforced concrete structure with a mezzanine. For the sake of discussion assume a rectangular building with the mezzanine running the full length along the back (long wall). When developing the rigidities for the walls supporting the roof are the front walls twice as tall as the back walls that are attached to the mezzanine and therefore substantially less rigid although length, thickness and openings are approximately the same?






RE: Walls in rigid diaphragm with mezzanine
RE: Walls in rigid diaphragm with mezzanine
The wall that has a mezzanine at mid-height could be referred to as two spring loaded in series. But, the net results is that the roof sees nearly the same stiffness at the top of each wall.
RE: Walls in rigid diaphragm with mezzanine
If a mezzanine connects two of such walls but at the same height, of course the rigidity of the wall level under it is the same, for a mezzanine whole diaphragm.
Contrarily, if what is wanted is some diaphragm following the slope of the roof, and we forfeit any effects some mezzanine connecting just to the tall side may be adding, the case is the contrary, for for the same force atop each wall, the tall wall will displace more.
F=G·A·gamma leading to equal gamma but displacement atop is gamma·2·L where at the lower gamma·L both for the same force, hence stiffness a half for the tall wall (F related to horizontal displacement).