If column are beneath basement wall (shear wall),there are any chance of future problem? 1

[dr. rifat]

Hello Engineers,

I am uploaded two column layout,please leave a comment about marked column.


Thanks in advanced.

http://imgur.com/a/NGsmx

RIFAT

 

[KootK]

Are the affected beams and columns part of moment frame lateral load resisting systems? Or just gravity load framing members?

I like to debate structural engineering theory -- a lot. If I challenge you on something, know that I'm doing so because I respect your opinion enough to either change it or adopt it.

 

[dr. rifat]

Affected beams and columns are the part of moment resisting systems of lateral load

RIFAT

 

[KootK]

If the beams are part of moment frames in the East-West direction, then you're probably stuck with option one. Option two wouldn't provide the flexural continuity between beams that you'd want for a moment frame. That said, option one isn't great either. having to kink the beams at the column joints will be a contructability and detailing nightmare, especially if those joints need to undergo plastic hinging. As much as possible, I'd seek to align your beams and columns along a common line.

I'm not clear on where the shear wall factors into this. Is there to be a shear wall constructed above these beams?

I like to debate structural engineering theory -- a lot. If I challenge you on something, know that I'm doing so because I respect your opinion enough to either change it or adopt it.

 

[dr. rifat]

This is semi basement construction,thats why we provide shear wall.Height 9'.

I think if we implement option 2,how to construct floor beam?There may be congestion of reinforcement in beam-column-shear wall junction.Also is there any chance to transfer back fill pressure into the column?

RIFAT

 

[KootK]

Is your moment frame actually beside the basement shear wall rather than beneath it? If so, I'd expect the shear to get drawn to the wall rather than the moment frame. I'm really not sure that I understand your situation here. Could you post some sections or elevations? Obviously, you have some detailing and constructability issues as your beam column joints. What are your other concerns? Unbalanced soil pressure will find its way into the building lateral system as a whole but should not impact your coming much if they're inboard of the basement walls.

I like to debate structural engineering theory -- a lot. If I challenge you on something, know that I'm doing so because I respect your opinion enough to either change it or adopt it.

 

[KootK]

I see your point about option two now. The columns would relieve pressure from the backfill, particularly where the long axis of the columns is perpendicular to the walls.

I like to debate structural engineering theory -- a lot. If I challenge you on something, know that I'm doing so because I respect your opinion enough to either change it or adopt it.

 

[dr. rifat]

I didn't complete the design or any section,its just preliminary plan.I want to sure that which is structurally safe.

RIFAT