sp Column fixity condition

[ATHS]

I am unclear on which options to choose for design of a pier column. The pier column will be between a pier cap and drilled shaft. The length of column is about 26 ft. My understanding is it will be a sway frame in y axis for sure but not 100% clear on x axis (y being the axis parallel to bridge a x being perpendicular to bridge). In addition, I am not clear on the end conditions to choose. End conditions has always caused my problem. Some explanation on end condition of the pier column would be greatly appreciated.

 

[HTURKAK]

You did not provide a lot of information here. What about bridge deck ? Do the deck girders supported on bearings or monolithic with pier ? Is the pier column single column pier or rigid frame pier composed of columns ?

Pls provide more info. a sketch also would help to get better responds.




According to the grace of God which is given
unto me, as a wise masterbuilder, I have laid the foundation, and another buildeth thereon. . . .
I Corinthians 3:10

 

[ATHS]

@HTURKAK
It is a 9" concrete deck and the girders would be supported on the elastomeric bearing. Please see attached reference for a similar bridge.

 

[HTURKAK]

I just see your respond. My timezone is ( UTC+7) In your case,

- ALONG Y axis , sway cantilever column ( although the pc girders provide some restrain with friction ) , and free to rotate at the top .The last figure ( free to sway and rotate at the top and fixed at the bottom ). Lef should be around 2.1 *Lo ( for design )

- Along X axis, sway frame but rotation limited due to frame action . The 5th figure ( free to sway but no rotation at the top and fixed at the bottom ). Lef should be around 1.05 *Lo ( for design )



According to the grace of God which is given
unto me, as a wise masterbuilder, I have laid the foundation, and another buildeth thereon. . . .
I Corinthians 3:10