Concrete Design according to ACI 318-19 Now Available

October 30, 2020

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, and RISAFoundation v13.

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 has on concrete design as well as how these effects are implemented in RISA.

Tags: RISA-3D RISAFloor RISAFoundation RISAFloorES Concrete v15 v13 v19