Quick sense check on deflection calculation

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SUMMARY

The discussion centers on the calculation of deflection in a frame's box section legs using the second moment of area. The user inquired whether to multiply the second moment of area by two due to the presence of two ventricle legs in the frame. The conclusion reached was that a good night's sleep resolved the confusion, indicating that the initial approach was correct. The mention of "Seis.x" as a seismic load scaling factor clarifies that it should be disregarded in the deflection calculation.

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  • Basic knowledge of free body diagrams
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Mech King
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Hi guys,

I just wanted a quick sense check. I have uploaded two images; one showing basic free body diagram, one showing some quick scoping calculations.

My question is, to do a simple deflection calc on the box section legs of the frame, do I just use two multiples of my second moment of area in the deflection calculation, as I have done on the second image? Since there are two ventricle legs? Ignore the value "Seis.x" in the calculation, this is just a seismic load scaling factor!

Simple problem I think, but my brain is fried from MathCad all day :/

Cheers

ImageUploadedByPhysics Forums1374246289.440818.jpg


ImageUploadedByPhysics Forums1374246317.552456.jpg
 
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Sorry, all sorted now. Good nights sleep was all that was needed :)
 
Sorry, all sorted now. Good nights sleep was all that was needed :)
 

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