M.Arslan Umar

AoA Can the steel plate (connected to column) replace the cantilever sections. If not, then which type of sections would be more suitable?

AoA, Sir can you please share the connection details of Steel pile and cap plate? Regards

AoA Dear members, I have a few questions regarding the topic mentioned above. Is there possibility of resting an RCC flat slab over steel columns? Is there any research paper/article regarding that? What and how will the connection be made? What will be the connection response against sesimic activity? Thanks and regards

Thanks and Regards

AoA Members, 1) As per UBC torsional irregularity exists if "Maximum story drift, computed including accidental torsion, at one end of the structure transverse to an axis is more than 1.2 times the average of the story drifts of the two ends of the structure". In our general practice, we compare the ratio of maximum displacement to average displacement with 1.2 to confirm if the torsional irregularity exists or not. But as per the above stated UBC Statement, we should consider the story drift instead of displacement. What could be then the possible reason for considering displacements instead of Story drift? 2) If ratio of Story drifts are to be considered for torsional irregularity check, then In ETABS 2016 there are two types of tables for drifts, one is " Story Max/Avg Drifts" and the other is "Diaphragm Max. / Avg. Drifts"(Pic Attached). Which is to be considered and what is the difference in between story drifts and diaphragm drifts? 3) What does accidental torsion means in the above statement and how it is calculated? Regards

Sir In that case, to satisfy the soil pressure due to moment is there any solution other than improving the bearing capacity?

But the question is why it is then satisfying in the middle portion where even the load is greater as compared to on the boundary. The load is less on the boundary still it is not satisfying the Bearing Capacity Soil Pressure Limit.

I am designing the Raft Foundation for G+8 Story Structure in SAFE. The Soil Pressure (Against Service Load) is exceeding the bearing capacity near to the exterior boundary of the Raft whereas at center where the Load is maximum soil pressure is in limits. What could be the possible reason?

AoA Sir, In that case if the building is nearly an Arc having Columns at varying angles, the Etabs would give the base shear reactions in localized axes. How could we then determine the total base shear of columns in global axes for the exact determination of building system in each direction? Regards,

A little Query further to my previous question: Can there be two structural Systems for a same building in X and Y direction?

Got it! Bundle of Thanks

Assalamualikum, How to check if my modeled building is having DUAL system or IMRF system.? In other words how to check if shear taken by Frame is more than 25% of the total shear.