PE Seismic Review: How to Calculate Chord and Collector Forces

[@karimgel]

Thank you so much. Could you please post again the link example..to practice the exercise

[@kirapiwpiw4804]

hello, can you draw the free body diagram on how the forces act?

[@dylanbolton6297]

Great vid but Flexible Diaphragm means forces are distributed through tributary width, not stiffness so the 10' wall in your case scenario at the end that you mentioned would actually be the one to take greater load. If it were a Rigid Diaphragm, that would be the case but Flexible is written. Hope this helps!

[@eugenekuehl]

Can you justify this through code section? This seems to be correct as the shear flow will behave to what’s stiffer. Curious because I have a PC arguing your case.

[@dylanbolton6297]

@eugenekuehl ASCE 7-16 Section 12.3 covers this but let me know if you can't find it and I'll get more specific for ya. Like you are getting at with shear flow, if the diaphragm flexibility is roughly over 2× the in-plane stiffness of the walls, it moves enough that the walls don't play a super important role on how strong they are and then everything distributes equally

[@ibaha411]

Good effort. One caveat though; the chord is not ought to be designed with omega factor when it consists of rebars within concrete. It d require omega factor if chord members are to be connected with dry connections, but just for the connection part of it, not for chord member rebars.

[@aboudeh21]

What do you mean by dry connection?

[@ibaha411]

@@aboudeh21 E.g., mechanical connections.

[@chrissyvillafuerte872]

the download example is broken

[@bishalnayak6162]

Very usefull. Best of luck.

[@emadnadi5206]

Great video, however, you needed to show the elevation view for better illustrations

[@twigsfloat2773]

Very helpful. Thank you!

[@farzadaalam3509]

perfect

[@halilovayolu5915]

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