...
Extended Question: When I mesh slabs and walls at 36”-48”, there are numerous warnings which include no stiffness, negative stiffness, lost accuracy, and ill-conditioned / unstable. However, when I change the meshing option to be only at visible gridlines, the model runs without error, and forces / reactions are significantly different. Why is this?
Answer: Columns In ETABS v9 and older columns are not automatically included as meshing locations. Therefore it is important to mesh at grid lines to avoid ill-conditioning and to ensure a stable model. For ETABS 2013 (v13) and beyond, floor default meshing recognizes columns as meshing points, hence this is rarely and issue anymore
| Hidden content |
|---|
| *Related Incident:* * {incident:no=47898|comment=T/Q} |
...