Hello i would like to know what needs to be considered in order to ensure beam - column joint is stronger, especially when the beam width is greater than column width,lets assume my beam is 400mm x 600mm while column is 250mm × 300mm.
Is there any special detailing needs to be considered with this kind of geometry?
Can RCDC design this kind of joint using BS 8110?
Beam width can never be grater than column width in concrete members. It must be equal or smaller than column width.
Analysis result will let you know if you have to increase column width or you can reduce your beam width.
May you elaborate for me ,the reason behind this scenario that the beam width should be smaller or equal to column width?
If its vice versa what will happen?
Hi,
BS 8110 do not provide guidelines for the column and beam joint check. I would suggest you use BS EN 1992-1-1-2004 (Base /Custom) code available in RCDC. in some scenarios, beam width can be more than the column width. However, it is recommended to provide vertical and horizontal links in the column beam junction. Providing links along both the directions in joint will make sure the confinement of the joint. Also, it will make sure that the load from the beam is effectively transferred to column. Generally, it is recommended to do this type detailing where structure lies in low risk of Seismic zone. for high-risk seismic zones, I would suggest you perform column beam joint check using BS EN 1992-1-1-2004 code.if you use the BS EN 1992-1-1-2004 (Base /Custome) for such a case, it is very difficult to pass the column beam joint check. The flexural capacity of the column must be 1.3 times the beam flexural capacity meeting at that joint. So, generally if you want to perform column beam joint check, column size would be more than the beam sizes.
Answer Verified By: Joseph Lucas Magare
Thank you Abhijeet for the detailed explanation.
I have tried to google the vertical and horizontal link sample detail to get a clear picture on how the detailing has to be done but i did not see it,if possibl3 may you help me with a snap showing a sample detail showing how to provide vertical and horizontal link on column beam junction