MASS User Documentation

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Shear Design

Technical

Why is masonry shear resistance reduced for seismic effects in a shear wall design?

When Shear Resistance is Reduced, Have No Fear! Seeing the masonry component of a shear wall’s shear resistance is a part of everyday life in these uncertain times. There are three scenarios where any increased expected damage resulting from higher ductility will reduce the degree to which the masonry can Read more…

By Brad Crumb, 2 years2 years ago
Technical

Bonus Post: What happens when you treat a Multi-Storey Design as an Element when Increasing Factored in-Plane Shear ?

Does changing the analysis method effect the final results?   The process shown here is how MASS internally performs the analysis because the design is all done at the element level. If you are interested in how Vf,seismic is determined having only the information for one element available, this page Read more…

By Brad Crumb, 2 years2 years ago
Technical

Checking Vf,seismic for a Shear Wall Element

Taking seismic effects into account in MASS can be confusing. Seeing factored shear forces scaled up by over 100% in some cases may seem larger than expected. The main post found here outlines the clauses being invoked here where the requirements are broken down into two parts: (a) and (b). Read more…

By Brad Crumb, 2 years2 years ago
Technical

Why is the Factored Shear Force Scaled Up for Seismic Considerations on a Shear Wall Design?

Explaining these clauses and how they are applied   Questions about the seismic effects on shear resistance? Click here for a separate post. This page covers the scaling up of seismic forces applied to the wall. You may have noticed after running a few designs in the newly released MASS Read more…

By Brad Crumb, 2 years1 year ago
Technical

Checking Vf,seismic for a Multi-Storey Shear Wall

Taking seismic effects into account in MASS can be confusing. Seeing factored shear forces scaled up by over 100% in some cases may seem larger than expected. The main post found here outlines the clauses being invoked here where the requirements are broken down into two parts: A and B. Read more…

By Brad Crumb, 2 years2 years ago
Recent Posts
  • Change Notification: Lambda Values for Beam Density and Shear
  • Bug Notification: Drift Values instead of Elastic Deflections used for Inelastic Rotational Demand
  • Bug Notification: Seismic reinforcement spacings applied to all shear walls resisting an earthquake load
  • Notification: Seismic Shear Forces Amplification Change for Elements Above Critical Section
  • Bug Notification: Non-Seismic Lateral Companion Loads Amplified for Seismic Effects
  • Version 4.0 Feature Spotlight: Ductility Verification
  • Version 4.0 Feature Spotlight: Simplified National Building Code Seismic Design
  • Bug Notification: Out-of-Plane Shear Resistance checked only at location of maximum shear
  • Known Bugs in MASS
  • MASS Version 4.0 is now available – adds multi-storey design and more earthquake design options
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