portal one side braced other
portal one side braced other
(OP)
hi how do you determine the effective stiffness in ordor to calculate how horizontal load is shared if in a structure you have portal on one side and braced frame the other (in the same plane obviously)






RE: portal one side braced other
Mike McCann
MMC Engineering
Motto: KISS
Motivation: Don't ask
RE: portal one side braced other
Do you have an analysis packege available?
RE: portal one side braced other
As a quick estimate, the lateral stiffness of a single portal column (pinned bottom, free translation and fixed rotation top) is 3*E*I/L^3. Whereas the lateral stiffness of the brace is A*E/L*(sin(angle))^2 (I haven't looked at a textbook for those equations, they are off the top of my head so their could be errors).
The brace component of the lateral stiffness will more than likely be the major contributor.
RE: portal one side braced other
I am guessing that maybe one frame or the other is an existing structure and you are adding to it?
RE: portal one side braced other
Michael.
Timing has a lot to do with the outcome of a rain dance.
RE: portal one side braced other