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Skew lift with coincident joints

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scvarma

Structural
Dec 23, 2014
1
Hi,
I have modelled a frame in SACS and performed a lift analysis with two coincident hook points, one fixed and another free in vertical direction for application of 25% load to create skew loads.. but i find that members are failing due to twist ( warping ) the same structure is passing with skew load factor of 1.5 but fails when skew distribution is done for diagonal slings ...why??... what do you think is the solution ???
 
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We need a better explanation, a sketch would help.

Michael.
"Science adjusts its views based on what's observed. Faith is the denial of observation so that belief can be preserved." ~ Tim Minchin
 
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