Buckling analysis

Is there a slab (ie diaphragm back to the lateral stability system) at the bottom of the wall and top of the columns?

The cantilever length , size of the columns are not provided..

Apparently the deep beam is supported on the top of columns , that is, the columns do not extent to top of beam ..

I will suggest to extent the columns up to top ( thicken the deep beam at column locations ), develop STM model to calculate the required reinf.. and look to the following doc.


CIRIA GUIDE 2 The design of deep beams in reinforced concrete

Appendix C Buckling strength of deep beams.

Good luck..

Thank you for your help.
There is slab at the bottom that I didnt draw so it is not really a cantilever wall although I made it so when I used strut tie model.
The ‘cantilever length’ is around 4m and columns below is 300mm*1000mm
Yes the slab is lateral restrained by other shear walls.
I have done the strut tie analysis and will provide confinement at nodes to further enhance the capacity. It is just the buckling that bothers me. I dont know if I can take say 1-3m as the length of the wall and design it using two way bulking since I have no interacting walls here.
I will check the guide you recommend. Thanks