Greater control over link-elements in models with large displacements has been added. This new behavior applies to nonlinear static, direct-integration, and staged-construction load cases where the geometric nonlinearity parameter has been set to P-Delta plus Large Displacements.

ACI 318-19 slenderness checks for wall buckling in the out-of-plane direction are now performed for walls in a single plane (i.e. 2D pier) for uniform and general reinforcing options.

ACI 318-19 shear wall design now considers the Seismic Design Category (SDC) when determining whether a wall shear capacity check is required.

ACI 318-19 and AS 3600-2018 concrete frame design output has been enhanced with additional parameters now reported for column slenderness design. For ACI 318-19 code, these parameters are beta_dns, (EI)eff and Pc. For AS 3600-2018 code, these parameters are beta_d, φ*Mub and Pc.

A new link property was added to represent the Sumitomo Viscoelastic Damper produced by Sumitomo Rubber Industries.

Composite Beam Design codes have been added for the Indian IS 11384:2022 and the Chinese GB50017 codes.

Rebar detailing information for concrete columns and beams can now be accessed from the object right click form when detailing results are available.

The rebar detailing editor for strip rebar can now be accessed from the design strip right click form when slab detailing results are available.

1. 1. New joist design code SJI 100-2020 has been added.
2. 2. A new type of steel joist section has been added, "Custom Joist Section", whose definition includes component section data.
3. 3. A detailed calculation report has been implemented.

An enhancement has been added for Special Structural concrete shear walls per ACI 318-19. The design is now done using the amplified factored shear force, Ve = Omega_v * w_v * Vu < 3.0 * Vu) per section 18.10.3.1. This check for Special Structural Walls was not present in earlier versions.

The ETABS API has been updated to support .NET 8.

Steel connection design is now available per the AISC 360-16 and AISC 360-10 codes. This includes Beam-Beam, Beam-Column, Column-Footing, welded, and bolted connections.

The frame hinge assignment feature has been enhanced with four new preset hinge assignment distribution types:

1. 1. Beam Column, which adds a moment or PMM hinge at the ends of the frame object.
2. 2. Distributed Plasticity, which adds hinges along the length of the frame object based on a specified integration rule.
3. 3. Equal Spacing, which adds hinges at a fixed spacing along the length of the frame object.
4. 4. Continuous Support, which adds one hinge at the center of every frame element associated with the selected frame object.

An enhancement has been made to speed up direct-integration time-history load cases with additional modal damping specified for a large number of modes. For building structures, the higher-frequency modes typically respond statically to seismic and wind loading, and stiffness proportional damping is more efficient for the damping at high frequencies.

The option to disable saving of individual fiber results for Fiber P-M2-M3 frame hinges is now available. This can significantly reduce disk storage when individual fiber stress-strain results are not needed. Detailed hinge results will still be available, including the state and status of the hinge obtained from the fiber results.

Enhancement added for exporting Non-Linear links from ETABS to Perform3D. Following links types are handled:

1. 1. ETABS Damper - Exponential > Perform3D Fluid Damper
2. 2. ETABS Gap > Perform3D Nonlinear Elastic Gap-Hook Bar
3. 3. ETABS Hook > Perform3D Nonlinear Elastic Gap-Hook Bar
4. 4. ETABS Rubber Isolator > Perform3D Seismic Isolator, Rubber Type
5. 5. ETABS Friction Isolator > Perform3D Seismic Isolator, Friction Pendulum

ETABS models exported to Perform3D now include shell uniform loads in the global coordinate system. These loads will be exported to Perform3D as lumped nodal loads on the nodes which form the shell elements.

For ETABS models exported to Perform3D, frame objects that are assigned a Pier or Spandrel label will be exported to Perform3D in separate element groups based on their Pier or Spandrel label names.

ETABS models exported to Perform3D now include Line and Quad gauge elements. Translational type line gauges in ETABS will be exported as Perform3D Axial Strain Gage (2-node) components. Rotational type line gauges in ETABS will be exported as Perform3D Rotational Gage, Beam Type (2-node) components. Shear type quad gauges in ETABS will be exported as Perform3D Shear Strain Gage (4-node) components. Rotation type quad gauges in ETABS will be exported as Perform3D Rotation Gage, Wall Type (4-node) components.

Detailing of concrete and steel structures, as well as the production and management of schematic design drawings, is now available from a new Detailing menu inside ETABS. It can now handle multiple towers as well.

Detailed reinforcement from beams, slabs, column stacks, and wall stacks can now be exported from ETABS to Autodesk^® Revit^® through the CSiXRevit^TM 2023 plugin to Revit 2023.

Tributary PT tendons are now accounted for in finite element-based design of slabs and cracked-slab deflection analysis (short- and long-term).

Auto-wind load, auto-seismic load, and response-spectrum function based on ASCE 7-22 have been added.

Loads assigned to null lines and null areas applied in any local or global direction are now transferred to the underlying structural floors. In earlier versions only loads in the gravity direction were transferred.

Nonlinear shear-material state and status output for general wall hinges is now available in the database tables, deformed shape display, and performance-check output.

Support for .NET 6 has been added including a help topic in the "Key Concepts" folder.

• • Parameters for the Italian NTC 2018 response-spectrum function.
• • Design preferences and design overwrites for steel frame code CSA-S16-19.
• • Parameters for eigen and Ritz load cases.