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Alternative Diaphragm Design: Shear VS Flexure Controlled Diaphragms!!

Alternative Diaphragm Design: Shear VS Flexure Controlled Diaphragms!!

Alternative Diaphragm Design: Shear VS Flexure Controlled Diaphragms!!

When designing a diaphragm using the alternative diaphragm method, there are two categories, shear controlled and flexure controlled, I am getting confused on how can I qualify my diaphragm according to those two categories! The definition of the ASCE7-16 is very general!

FLEXURE-CONTROLLED DIAPHRAGM: An example of a flexure-controlled diaphragm is a cast-in-place concrete diaphragm, where the flexural yielding mechanism would typically be yielding of the chord tension reinforcement. SHEAR-CONTROLLED DIAPHRAGM: Shear-controlled diaphragms fall into two main categories. The first category is diaphragms that cannot develop a flexural mechanism because of aspect ratio ,chord member strength, or other constraints. The second category is diaphragms that are intended to yield in shear rather than in flexure. Wood-sheathed diaphragms, for example, typically fall in the second category.

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