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canwesteng said:...both will had similar stiffness, until the end plate yields.
canwesteng said:I think the right sketch would be a four bolt unstiffened connection, which is still classified as partial moment restraint. To be full restraint you need 8 bolts for the tension flange in a 1/3 configuration, or a stiffener.
canwesteng said:If the bolts are pre-tensioned as they should be, I don't think there is much bolt stretch until ultimate loads. Which leaves the plate itself, but extended end plate is going to be less stiff than the portion between the flanges (substantially so at the scale sketched above).
Yes, but you have a significantly lower moment arm so higher forces AND in this drawing a thinner plate. On visual inspection which is all we have here there is no way I'd call the one on the left a moment connection.canwesteng said:Which leaves the plate itself, but extended end plate is going to be less stiff than the portion between the flanges (substantially so at the scale sketched above).