December 27, 2013

What are Web Doubler plates used for in RISAConnection?

For moment connections in RISAConnection there is an option to place web doubler plates on the column web. These plates act as a reinforcement for the column web to prevent panel zone shear failure. As shown below, when the flanges of a beam in a moment connection connect to a column they form a force couple which causes the column to kink.


If the column web is too thin to handle that kink then it will fail through tearing or buckling. In order to prevent this failure on connections which have a high amount of panel zone shear you can use web doubler plates. These plates are applied directly to the web, and welded all around.


When using these plates they are considered to increase the column web thickness, which in turn increases the panel zone shear capacity significantly. As an engineer be sure to use these web doublers only when absolutely necessary though. They are very expensive to fabricate, and often a design featuring a column with a thicker web is ultimately cheaper.

Tags: RISAConnection

You may also be interested in

Nov 8, 2018 | Tips & Tricks
Mat Slab Overturning and Sliding Safety Factors

RISAFoundation v11.0 includes two new tabs in the Safety Factors resul...
Read More

Aug 21, 2019 | Tips & Tricks
RISA-3D v18 Sneak Peek Videos

The new release of RISA-3D is right around the corner! Check out our t...
Read More

Jul 12, 2019 | Tips & Tricks
Implementing Realistic Behavior for T/C Members in RISA-3D

Tension or Compression (T/C) Only members are commonly used in steel b...
Read More

Jun 20, 2019 | Tips & Tricks
Understanding Wall Panel Forces with Rigid Diaphragms

Rigid diaphragms represent a plane of very high rigidity and distribut...
Read More