Introduction

This video, the second in a four-part series, explores flexible diaphragm design in Shearwalls, building on the previous discussion of flexible vs. rigid diaphragm distribution. It explains that while some Canadian and US codes permit flexible-only assumptions (e.g., ASCE 7-16 for light-frame structures), NBC Part 4 requires both analyses. Engineers can determine flexibility based on diaphragm deflection exceeding twice the shear wall story drift, though the Program does not calculate this directly. A demonstration using a sample building shows how to toggle between flexible, rigid, or worst-case scenarios in Shearwalls. Running a flexible diaphragm analysis distributes forces based on tributary areas, with results guiding structural design. The next video will introduce torsional analysis in shearwall design.

Résultats de l'apprentissage

A la fin de cette leçon, vous serez capable de :

• Differentiate between flexible and rigid diaphragm distribution assumptions and their impact on shearwall design.
• Identify when flexible diaphragm distribution is permitted based on Canadian and U.S. building codes, including ASCE 7-16 and CSA O86.
• Utilize Shearwalls Program to select and analyze different diaphragm distribution methods.
• Assess shearwall deflections in the program and compare them with manually calculated diaphragm deflections to determine flexibility.

Instructional Video (Part 2 of 4)

Video Run Time: 03:51 minutes

This video utilizes one project file and it is available for download below.