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Posts tagged: etabs
4 posts tagged with “etabs”.
Accidental Torsion: The Load Case Your Symmetric Building Still Needs
Your plan is symmetric, the centre of mass sits on the centre of rigidity, so torsion is zero — right? AS 1170.4 disagrees, and the eccentricity it makes you carry lands hardest on the corner elements you were least worried about.
8 min read
P-Delta in ETABS: What the Setting Actually Does, and When It Bites
Ticking the P-delta box doesn't mean you've captured second-order effects. ETABS handles one half of the problem at the global level and leaves the other half to member design — and the gap is where people get caught.
8 min read
Modal Results That Look Fine and Aren't
The model ran, the periods came out, the building drew a nice mode shape. None of that tells you the dynamics are right. Here are the checks that catch the silent errors before they reach a design report.
8 min read
Cracked Section Properties in ETABS — What Most Engineers Get Wrong
Applying 0.7 to all columns and 0.35 to all walls and moving on is the most common stiffness-modifier mistake I see — and the one with the biggest downstream consequences.
8 min read