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Old Nov 29th 2016, 07:09 AM   #1
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twisting at shear center / centroid

In the notes , the author stated that when the force is applied through the centorid of cross section , the channel will bend and twist.
but , on the second page , the author stated that the shear center lies on an axis of symmetry of member's cross sectional area...
So, i am confused whether the member will twist or not when the force P is applied thru the centroid or shear center ....

Why the shear center is located at O , which is located outside of the C channel ?

In the notes , it's also stated that to prevent twisting , the P should be applied at O , does it mean we have to apply the force thru the centoid and also at the O at the same time to prevent twisting ? i'm confused
Is there anything wrong with the notes ?
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twisting at shear center / centroid-438.png   twisting at shear center / centroid-439.png  
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Old Dec 17th 2016, 02:34 AM   #2
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Old Dec 19th 2016, 06:29 AM   #3
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