Mechanicos Z

column 13 and 20 in the images shown above have eccentric beams the distance between the centroidal axis of the column and connected beams is above the limit allowed by Eurocode 8 actually columns 13 and 20 are doubly eccentric because both beams are eccentric

what software are you using for analysis and design

Thanks for your reply, may i ask you one more question? did you ever design a similar column like the ones i have here? (with ecentric beams?) did you get any extreme results?

Robot structural analysis, have you used it before?

In addition to the above i also noticed that in certain cases when i increase the shear reinforcement the shear force also increases

This is the confusing part....when i view the results for the distribution of the shear force on each frame, everything looks reasonable,however when i export the elements into the design module of the software the results i get for the shear force are extremely high. Which means that the results the software uses for the design of the elements are extremely high.

Hello everyone, I am designing a 2storey RC frame house according to EC2 and EC8 and three of the columns are impossible to design. Two of these columns 13 and 20 are of similar configuration, please see image below. They have eccentric beams connected perpendicular to the column one at each end.all columns fail at seismic load combinations. No matter how much shear reinforcement i add or how much i increase the column section it still fails at seismic combinations. I tried researching why these 3 columns fail and i found out some excessive shear forces are generated at the seismic combinations reaching up to 1000kN in the strong axis of the column.I think this is way excessive considering the fact that this is just a 2storey house and in fact the total base shear of the structure (in the design spectrum acceleration) is only about 900kN. So what do you guys think?