Hi,
We have a building in which we have first mode as torsion mode. One of colleagues is saying that instead of correcting the geometry like adding shear walls or changing column orientation, we should find the eccentricities at diaphragms and use those increased values in the load patterns. I am sure that this is not a correct approach, but can some shed light on this. My reference code is ASCE 7-16. The torsion happens due to the difference between the center of rigidity and mass. So he is arguing that we can use the increased eccentricities value to bypass the correction of first torsion mode. I need an counter argument for this approach.
Thanks
We have a building in which we have first mode as torsion mode. One of colleagues is saying that instead of correcting the geometry like adding shear walls or changing column orientation, we should find the eccentricities at diaphragms and use those increased values in the load patterns. I am sure that this is not a correct approach, but can some shed light on this. My reference code is ASCE 7-16. The torsion happens due to the difference between the center of rigidity and mass. So he is arguing that we can use the increased eccentricities value to bypass the correction of first torsion mode. I need an counter argument for this approach.
Thanks
