Lesson 1: Introduction to Shearwalls
Lesson 4: Shearwall Design: Capacity vs. Deflection Based Force Distribution
Lesson 9: Modelling Techniques and Tips
Course Summary

Part 7: Seismic Information and Seismic Irregularities

Introduction

This video explains seismic information and irregularities in shearwall design. It introduces two key tables: Seismic Information, which details mass, forces, and story shear capacity, and Seismic Irregularities, which identifies structural irregularities per NBC. A key focus is ensuring the overcapacity ratio between the first and second stories remains within a given rangeto prevent soft story conditions.

Learning Outcomes

By the end of this lesson, you will be able to:

  • Interpret seismic design results by analyzing the Seismic Information and Seismic Irregularities tables in Shearwalls Program.
  • Evaluate overcapacity ratios between building stories to ensure compliance with CSA O86 and prevent soft story conditions.
  • Identify seismic irregularities in accordance with NBC, understand their impact on structural stability, and determine if they cause design failures.
  • Recognize Program limitations in detecting certain irregularities and understand when alternative analysis methods may be required.

Instructional Video (Part 7 of 7)

Video Run Time: 04:04 minutes

This video utilizes two project files and they are available for download below.