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Point of Fixity

Point of Fixity

Point of Fixity

(OP)
Can any one corroborate my definition of point of fixity in a driven pile? Is it the point at which the lateral deflection first reaches zero?

If anyone has a better or more elaborate definition, I would appreciate.

Thanks

RE: Point of Fixity

There are two different definitions, one dealing with the maximum moment and the other dealing with the point of zero rotation.  Please explain your problem, and I'll offer what I know -



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RE: Point of Fixity

Should we send him that discussion paper?

RE: Point of Fixity

(OP)
BigH,

Send the paper at this address LM_1959@hotmail.com

I just need a clear definition for lets say you have a steel or concrete pile. The pile is driven X feet into the ground, the pile extends Y feet above the ground and the pile top is supported. In computing maximum moments due to a lateral load imposed between top support and the ground. I would assume the proper way to compute moments is to use the length to the point of fixity.

Now, how do we determine the point of fixity if I do not have the services of a geotechnical engineer?

Thanks

RE: Point of Fixity

Do you have geotechnical data, or is this a preliminary design/WAG?  Will a "rule of thumb" answer be good enough?  Are we talking golf cart bridges, or multi-lane highway structures?



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