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Question on fixity

Question on fixity

Question on fixity

(OP)
Dear all,

I am wondering if there's any typical guidelines or rule of thumb to determine fixity at supports of (say)bridge piers...

Thankx

RE: Question on fixity

I think you need to elaborate a little bit. Are you talking about establishing a % of fixity to put into a program based on what the physical field conditions are?

RE: Question on fixity

Most bridge piers are supported by piling and these, relative to the pier itself, don't have a lot of fixity/stiffness.  I know that we either assume a rotational pin, or, if we want to get more exact, model the piling for about 5 or more feet and fix the bottom of the piling.  That way, the rotational stiffness of the piling are included in the model.

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