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Posts tagged: seismic
3 posts tagged with “seismic”.
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
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
Wind or Seismic Governs — And Why the Answer Changes Up the Height
Comparing base shears tells you almost nothing. The governing action flips between shear, overturning, and drift — and between wind and seismic — at different levels of the same building. Here's how to read it.
8 min read