March 26, 2016

Improved Wall Panel Results

Wall Panel Forces Spreadsheet

The power of RISA is the easy to access output. The Wall Panels have all the calculations and forces displayed in the Detail Report and now the new Wall Panel Forces gives you a quick way to get all the forces across the base of the wall. This new spreadsheet can be found in the Data Entry toolbar or the Results menu.

Masonry Wall Summary Report

The Masonry walls now have a Summary Report in the Detail Report. This gives you all the information on the wall, drawing of the wall with regions and openings, and results for the unity, reinforcement and lintels.

Tags: RISA-3D, Walls, New, Spreadsheets

April 7, 2020 | RISA-3D, Concrete, New, Shear Walls

Understanding Out-of-Plane Shear Capacity of Concrete Wall Panels

When designing concrete shear walls for lateral loading, RISA-3D includes design checks for both in-plane and out-of-plane shear. In the condition where a concrete wall is under both axial tension and out-of-plane shear, the out-of-plane shear limit state for a specific region within the concrete wall detailed report includes the details shown below: This limit state may cause users to ask the question: “why is the a phi*Vns term listed when no out-of-plane shear reinforcement is present?” The answer is that when calculating the out-of-plane shear capacity of the concrete wall, RISA-3D considers Shear Friction developed at the crack interface. ACI 318 code defines shear friction as the shear transfer across any given plane, such as an existing or potential crack, an interface between dissimilar materials, or an interface between two concretes cast at different times. In this case, the existing/potential cracks condition applies. When axial tension and out-of-plane shear are applied to the concrete wall, cracks will form across the wall thickness as explained by the simplified force diagram shown below: The shear sliding at the crack generates tensile forces Fs in rebar. In return, these tensile forces, Fs cause compression forces, Fc at the concrete crack interface. The…

October 30, 2020 | RISA-3D, Walls, RISAFloor, New, v15, v19, Cold Formed Steel

Cold Formed Steel Wall Design Now Available

Cold-formed steel framing is a durable, reliable and cost-effective option for low-rise and mid-rise building projects. With the release of RISA-3D Version 19 and RISAFloor Version 15, cold formed steel (CFS) walls are now available for analysis and design. Walls that have been designated as lateral in RISAFloor will be transferred into RISA-3D when utilizing the Director feature. Currently, CFS walls are only available when the AISI S100-16: ASD or LRFD code is selected from the Model Settings. To draw CFS walls in RISA-3D, simply choose CFS from the Wall Material dropdown menu in the Properties Panel. The design for the CFS walls will follow the criteria assigned in the Design Rules. The Wall Design Rules may be modified through the Wall Design Rules spreadsheet, or through the Wall Definition Editor by selecting the ellipsis to the right of the Design Rule in the Properties Panel. CFS wall sheathing material options include Wood Structural sheathing, Steel Sheet sheathing, Gypsum board panels and Fiberboard. The sheathing material may be selected in the Wall Design Rules spreadsheet or within the Wall Panel Definition Editor. The program will design the optimal sheathing size based on the thickness requirements and shear demands. The Segmented…

January 18, 2017 | Walls, RISAFoundation, New, Masonry

Masonry Retaining Walls now Available

Now available in RISAFoundation v9 is the ability to design masonry retaining walls and strip footings with the latest US codes. Simply define your masonry wall and reinforcement parameters in the Wall Footing Definition Editor and then draw your wall footing. Once you’ve drawn your wall and applied your loading you can solve the model and we will design the masonry wall based on the applied loading and the hydrostatic lateral forces…