ETABS Tutorial 14: Understanding Accidental Torsional Effects in ELF and RSA Methods

This video explains the accidental torsional concept in ASCE 7-10 and shows how to include this effect correctly in the Static and Dynamic analysis methods, using the help of ETABS software.

This video simplifies the process of correctly incorporating accidental torsion in both Static and Dynamic analyses. It shows how to include accidental torsional effects in the static Equivalent Lateral Force (ELF) procedure, and how to compute the Ax factor from ELF results and apply torsion amplification through specified eccentricities for each diaphragm.

Also, a detailed explanation of the available options for including the accidental torsional effect in the Response Spectrum Analysis (RSA) method is provided, highlighting the limitations in determining the Ax factor due to the total combined response obtained from the RSA method. It also provides insights into the correct way of determining the Ax factor using the RSA method.

0:00 Comprehensive Review of Previous Work
0:53 Changes due to the Transition to the New Model
3:12 Accidental Torsion Concept in ASCE 7-10
4:40 Accidental Torsion Effects Using ELF Procedure
9:50 Torsional Irregularity Check
11:28 Accidental Torsion Effects Using RSA
17:15 Summary of This Tutorial

You can access and download the Excel sheets by clicking on the link below:
https://drive.google.com/drive/folder...