May 10, 2017

Aluminum Design Code Update - AA ADM1-2015

The new Aluminum ADM 2015 code has been added in RISA-3D v15.0. To select this code for your design, simply open the (Global) Model Settings and under the Codes tab select AA ADM1-15:

The Detail Reports will display the code that the user has selected for their Aluminum design:

Tags: RISA-3D, New, Aluminum

September 11, 2017 | Seismic, RISA-3D, New, Analysis, Wind

Improved Drift Reporting

RISA-3D v15 now includes automatic drift definitions for diaphragms as well as simplified story drift application. The reported drift results have been updated as well, and are now much more relevant for today’s codes. Drift results will report results in red text when seismic drift exceeds the limits specified in ASCE-7 2010. In addition, deflection amplification due to 2nd order effects is now reported, and will appear in red text whenever it exceeds the AISC 14th edition requirements. Drift Definitions Spreadsheet The new Drift Definitions spreadsheet defines where the drift calculations will be performed. If the model contains diaphragms, the joints connected to that diaphragm will automatically be considered in drift calculations. In addition, Drift calculations may be performed at specific elevations (where diaphragms don’t exist) merely by specifying these elevations in the spreadsheet. The user may also specify individual joints to be used in drift calculation. This can be helpful for points that don’t line up well from floor to floor or don’t behave the same as other joints at that elevation. For example: Inclined columns Columns that span multiple stories Center of Mass locations What is Story Drift and Drift Ratio? The Drift at a given level is…

August 30, 2019 | Slab, RISAFoundation, New, Eurocode, Foundations

Foundation Design according to Eurocode 2

RISAFoundation v12 includes mat slab, concrete beam and pedestal design according to Eurocode 2. For more information, check out the video below…

October 30, 2020 | RISA-3D, RISAFloor, RISA-2D, Concrete, RISAFoundation, New, Updated Shear Contribution for Concrete (Vc) per A, Interaction of Shear Forces Acting Along Orthogona, RISAFloorES

Concrete Design according to ACI 318-19 Now Available

The new ACI 318-19 concrete code has been implemented into RISA-3D v19, RISAFloor v15, RISAFoundation v13 and RISA-2D v19. To select this code for your design, simply choose them from the Codes tab of the Model Settings: A summary of the major changes that have been incorporated include: The expansion of permissible applications for high-strength reinforcement. As a result, many requirements for strength and ductility have been adjusted. Some of these requirements include but are not limited to the the strength reduction factor, the maximum/minimum flexural reinforcement limit, and the axial compressive strength of columns. The calculation for the shear contribution of concrete (Vc) in accordance with Table 22.5.5.1.The calculation of Vc must consider axial load (Nu) and/or the flexural reinforcement ratio (ρw) when Av > Av,min. A new size effect modification factor (λs) must be considered when Av < Av,min. The consideration for the interaction of biaxial shear forces in members when Vu/ΦVn > 0.5 in both orthogonal directions. New equations for the allowable compressive strength of concrete piles based on the type of pile. Additional slab reinforcement requirements at critical sections for punching shear. Refer to the articles linked below for more information on effects that ACI 318-19…