MASS User Documentation

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Ductile Shear Walls

Bug Notification

Bug Notification: Drift Values instead of Elastic Deflections used for Inelastic Rotational Demand

The current MASS approach in Version 4.0 means that linear elastic deflections are over-corrected in a way that largely overestimates demand, making ductility verifications far more difficult.   Many shear wall designs require that a ductility verification be performed and satisfied. While the software has a number of systems in Read more…

By Brad Crumb, 1 year ago
Technical

Failed the Ductility Verification? How to Pick a Higher εmu, the Maximum Compressive Strain

The addition of boundary elements to MASS Version 4 (as well as CSA S304-14) means that failing a ductility verification is not the end of the line   Boundary elements allow for the confinement of reinforcement in compression. Not only does this unlock more flexural capacity as steel in compression 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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