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- To: seaoc(--nospam--at)seaoc.org
- From: terrence turner <tnturner(--nospam--at)glen-net.ca>
- Date: Sun, 19 Apr 1998 13:18:01 -0400
This is my question for the week. When performing a 3 dimensional dynamic time history analysis using Etabs do we have to account for the accidental eccentricity by performing another analysis with the mass shifted 5 or 10 percent of the plan dimension perpendicular to the earthquake ground motion. Normally we perform in our office, three analysis, in order to satisfy the code's torsional requirements, (1.5e +- 0.1 Dn...etc) using the equivalent lateral static method. We merge the three results thru Merger and use Reader for interpreting our results. Now that we are performing dynamic time history analysis for seismic rehabilitation projects we are in a bit of a quandry as to the right procedure to utilize to satisfy the code requirements. I am also curious as to what other engineers think about Etabs? Jon Turner
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