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Software for Civil, Structural & Geotechnic Engineers, Architects, Surveyors.

LARSA 2000's makes modeling structures and accessing results easier than ever. The front-end has been entirely redesigned since the previous version of LARSA to improve performance, usability, and power.

Advanced 3D graphics
Modelling features

Larsa 2000 Standard
Larsa 2000 Plus
Larsa 2000 4th Dimension -
- For buildings
For bridges
Larsa 2000 Section composer
Larsa 2000 Design suites

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LARSA 2000/4th Dimension for Buildings

With the release of LARSA 2000, LARSA introduced finite element analysis in the 4th dimension, time. LARSA 2000/4th Dimension for Buildings serves the buildings construction industry, which will benefit from LARSA 2000/4D's construction & collapse analysis, floor/area loading, specialized meshing, and time-dependent material properties.

LARSA 2000 is also a powerful front-end (GUI) for the engine. The front-end includes new support for infinite-level undo/redo, fully rendered graphics, and many modeling and results viewing tools. For a full feature list, please see the LARSA 2000 Front-End Feature List.

Analysis Power

Construction & Collapse
Structures evolve as they are built, and they undergo changes when elements fail. Construction & Collapse provides an integrated means of modeling structural changes during construction and hypothetical scenarios of collapse.

Staged Construction Analysis
The modeling implementation of Construction and Collapse, Staged Construction Analysis organizes the evolution of a structure over time.

For complex structures such as cable stayed, suspension and segmental bridges that have many construction stages, the starting, stopping, altering and restarting procedure is unreasonable for the analysis. Staged construction analysis automates this, saving the user hundreds of modeling hours. Staged construction is also used for analyzing the effects of time-dependent material properties.

Progressive Collapse Analysis
The analysis implementation of collapse, Progressive Collapse Analysis allows for the analysis of a structure whose elements begin to fail.

Hysteretic Beam and Spring Elements
These elements exhibit inelastic material properties after yielding, including hysteretic behavior for loading and unloading. These elements make progressive collapse analysis possible under extreme conditions.

The hysteretic beam element can be used to model columns and beams with inelastic material behavior. The bilinear and tri-linear hysteretic spring elements are ideal for modeling member connections and soil-structure interaction.

 Other 4th Dimension Features

Seismic Isolators and Bearings
Isolator and bearing elements are used to model isolation devices, energy dissipation devices and bearings. They exhibit a nonlinear force-deformation relationship with hysteretic behavior.

The nonlinear time history analysis is essential in the design of buildings for seismic loading after construction. This analysis may include cables, beams and springs with hysteretic material behaviors, and nonlinear seismic isolation elements.

Material Time Effects
The effects of concrete creep and shrinkage, tendon relaxation, and the time-effect on elastic modulus are incorporated into staged construction analysis.

Features for Buildings

Floor/Area Loading
When you have a floor, loading member by member should not be necessary. LARSA 2000 abstracts the concept of a floor, allowing "areas," rather than individual members, to be loaded.

Tendons in Two Dimensions
Please see
tendons in two dimensions.

Other Features

Section Composer
The Section Composer is essential in the analysis of any bridge with nonstandard or nonprismatic sections.

Basic Analysis
Basic Analysis Types: Linear Elastic Static, Enhanced P-Delta, Eigenvalue, Response Spectra, Linear Time History, Nonlinear Static, and Moving Load

Standard Element Library: Members, Plates/Shells, Springs

Advanced Analysis
Advanced Analysis Types: Stressed Eigenvalue, Nonlinear Time History, Nonlinear Buckling, Plastic Pushover

Steel and Concrete Design
Code checking and design plugins.