Educational Video: Shear and Torsion

I found series of videos on youtube.com illustrating the concept of shear and torsion affecting the structures during the earthquake. The instructors are from U of Illinois and supported by NSF and NEES (www.nees.org). In the video, the instructors deliver the complex concepts of shear and torsion in very simple way so that the audiences can understand the concepts very easily. Let's watch the videos below:

  

Introduction

Shear Effect

                                                         Torsion Effect

Combined Responses