
January 3, 2019
What wood wall design method should I use?
RISA-3D is one of the few pieces of software on the market offering wood shear wall analysis and design accompanied by multiple design methods to best suit your detailing needs.
While members (beams and columns) follow conventions tied to their local axes, interpreting results for wall panels, plate elements, and design strips requires a slightly different perspective. These elements deal with both in-plane and out-of-plane behavior, and the sign conventions can change depending on the program and axis orientation. Overview Table of Sign Conventions Element Type Positive Moment (M) Shear (V) Axial (P) Notes Wall Panels – In-Plane Compression in positive local-y face Downward on right face Tension = Positive Applies to in-plane forces only Wall Panels – Out-of-Plane Compression on positive local-y face N/A N/A Defines “positive bending” convention Plates (RISA-3D) Positive Mz = Top surface in compression Shear follows right-hand rule Tension = Positive Local Z-axis defaults upward Plates (RISAFoundation) Positive Mz = Top surface in compression Shear follows right-hand rule Tension = Positive Local Z-axis defaults downward Design Strips / Support Lines Sagging = Positive (bottom fiber in tension) Downward on right face Tension = Positive Matches slab design workflows Wall Panels Wall panels report forces in both in-plane and out-of-plane directions. In-plane: Axial = Positive tension Shear = Positive when downward on the right face Out-of-plane: Positive bending = compression on the positive local-y face of…
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RISA-3D is one of the few pieces of software on the market offering wood shear wall analysis and design accompanied by multiple design methods to best suit your detailing needs.
Applying a Custom Rebar Layout in RISA-3D: To begin creating a custom rebar layout, simply click the Custom Rebar Layout button located in the Advanced tab of the ribbon toolbar.
Modeling tapered gusset plates in RISAConnection is now easier than ever. With the recent addition of the Custom Angle input, you may now enter an angle to quickly cut back a gusset edge.
The base material at the location of a weld may have less strength than the weld itself. In this case it will control the overall strength of the welded connection. In order to account for this, RISAConnection uses a weld strength reduction factor (α) which we call the Base Material Proration...
Wide Flange beam to HSS Tube column moment connections can now be designed in RISAConnection version 9 with both the US and Canadian design standards. HSS tubes may be selected as the supporting column member on either of the two moment connections:
RISAConnection assumes by default that your vertical brace connection is a one-sided connection without any outside influence or load transfer from other connected elements. Using this assumption, the design shear and axial force at the beam to column sub-connection is determined using simple...
Wide Flange Beam to HSS Tube Column Moment Connections can now be designed in RISAConnection version 9. HSS tubes may be selected as the supporting column member on either of the two moment connections:
RISAFoundation v11.0 includes two new tabs in the Safety Factors results spreadsheet that breakdown the slab’s stabilizing and destabilizing forces for each category. The new Overturn/Resist by Category and Sliding/Resist by Category tabs make it easy to understand how the program calculates the...
In RISA-3D, the current method of design for masonry lintels is Simply Supported where the masonry lintels are idealized into a simply supported pin-pin beam configuration. Now, masonry lintels can instead be analyzed using finite element analysis. With this method, the lintel will be fully...
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