Page Comparison

h1. Diaphragm forces

1. Apply diaphragm forces (define diaphragm using semi-rigid option)

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{center-text}Figure 1 - Apply diaphragm forces{center-text}

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2. Display any stress or shell force for the relevant load case

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{center-text}Figure 2 - Display stress or shell force{center-text}

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3. For maximum chord forces,  draw or define a section cut where maximum chord forces are expected

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{center-text}Figure 3 - Maximum chord forces{center-text}

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4. Moments in Z are the in-plane moment in slab make sure angle is zero, refresh as required

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{center-text}Figure 4 - In-plane moment{center-text}

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5. The  value of Z moment divided by slab width is equal to compression and tension chord forces

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{center-text}Figure 5 - Compression and tension chord forces{center-text}

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6. Shear and collector forces at slab-shear wall connection, draw or define section cut next to support following wall direction

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{center-text}Figure 6 - Shear and collector forces{center-text}

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7. Make sure angle is zero, in this case shear/collector force is equal to F2 or 2559lbs as expected

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{center-text}Figure 7 - Shear and collector forces{center-text}


h1. See Also

* [Rigid vs. Semi-rigid Diaphragm|etabs:Rigid vs. Semi-rigid Diaphragm]