CSI ETABS 23.1.1 Build 4293 Win x64 English

FEM-based buckling analysis of steel sections is now available via the integrated BucklingFEM plugin, enabling detailed eigenvalue buckling analysis of steel frame elements, capturing both global and local buckling modes. Shear wall design, concrete frame design, and reinforced concrete and PT slab design per ACI 318-25 are now supported. Additional new codes include shear wall design per CSA A23.3-24 and CSA A23.3-19, concrete shell design per Eurocode 2-2004, and concrete frame design per TCVN 5574:2018.
ETABS 23.1.1 Enhancements - Date: 8-Dec-2025
Data Exchange
Importing a SAFE model into ETABS is now supported at a user-selected story level, with advanced options for merging geometry, property definitions, and load assignments.

Analysis
FEM-based buckling analysis of steel sections is now available through the integrated BucklingFEM plugin. Steel frame elements can be converted into detailed FEM models for eigenvalue buckling analysis. This enables the capture of both global and local buckling modes, providing a more realistic assessment of member stability than traditional simplified checks. This feature is limited to the Ultimate level license.

Design
Shear wall design, concrete frame design and reinforced concrete and PT slab design for ACI 318-25 are now all available.

Shear wall design according to CSA A23.3-24 and CSA A23.3-19 is now available.

Concrete shell design according to Eurocode 2-2004 is now available.

Concrete frame design according to the Vietnamese TCVN 5574:2018 code is now available.


ETABSis an engineering software product that caters to multi-story building analysis and design. Modeling tools and templates, code-based load prescriptions, analysis methods and solution techniques, all coordinate with the grid-like geometry unique to this class of structure. Basic or advanced systems under static or dynamic conditions may be evaluated using ETABS. For a sophisticated assessment of seismic performance, modal and direct-integration time-history analyses may couple with P-Delta and Large Displacement effects. Nonlinear links and concentrated PMM or fiber hinges may capture material nonlinearity under monotonic or hysteretic behavior. Intuitive and integrated features make applications of any complexity practical to implement. Interoperability with a series of design and documentation platforms makes ETABS a coordinated and productive tool for designs which range from simple 2D frames to elaborate modern high-rises.
CSI ETABS 23.0.0 Enhancements
Founded in 1975,Computers and Structures, Inc. (CSI)is recognized globally as the pioneering leader in software tools for structural and earthquake engineering. Software from CSI is used by thousands of engineering firms in over 160 countries for the design of major projects, including the Taipei 101 Tower in Taiwan, One World Trade Center in New York, the 2008 Olympics Birds Nest Stadium in Beijing and the cable-stayed Centenario Bridge over the Panama Canal. CSI's software is backed by more than three decades of research and development, making it the trusted choice of sophisticated design professionals everywhere!