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Re: Rigid diaph. analysis with diagonal walls

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IF a skewed wall is analyzed by resolving each diagonal wall into equivalent X and Y length walls,
THEN    the resulting error can be as much as 30%.
This method should only be used by adding 30% of the Y forces to the X forces and, visa versa.
in other words
By using 100% shear plus 30% of shear affects from the perpendicular direction.

Know the method of your program.

Skewed wall stiffness in the direction of the base shear varies with the stiffnesses of walls perpendicular to that base shear direction.

All skewed wall stiffnesses reduce in the X direction when any one non-skewed wall, in the Y direction is reduced.

I wonder how the seminar by-Gosh for skewed walls worked out? Was it not given in the East Bay area near San Francisco?

David Merrick, Structural Engineer
WEIGHT, Conserves Energy, reduces noise and PROTECTS.

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