LARSA 4D

The one solution for staged construction and time-dependent analysis of bridges and buildings.

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LARSA 4D Overview

LARSA 4D is the one solution for staged construction and time-dependent analysis of bridges and buildings. Bsed on a rock-solid, truly 3D analysis engine, and with an intuitive and modern user interface, LARSA 4D is an essential tool for any construction project.

Time is the focus of LARSA 4D because it is an integral part of many current projects. LARSA 4D's Staged Construction Analysis is the most advanced time-dependent analysis in any software package, allowing the user to model not just the step-by-step activities that will take place to build the structure, but also to model time-dependent material effects, and to run analysis scenarios -- pushover, collapse, and live load -- at any point in the construction sequence.

LARSA 4D's user-interface is easy to learn, quick to use, and still more powerful than comparable software. All project data is shown and editable both through spreadsheets and graphics, making the user interface a best-of-both-worlds compared to alternatives. LARSA 4D also has infinite-level undo/redo, copy/paste to and from Excel, and modeling tools including meshing, generation, templates, and advanced drawing.

Other advanced features include 3D post-tensioning tendons, seismic and inelastic elements, bridge geometry control, and influence lines and surfaces. Read more below about these features.

Our Client Base

Projects world-wide are making use of LARSA 4D. Throughout the United States, bridge projects are using LARSA 4D's influence line and surface support for the AASHTO LRDF and LFD codes, and building projects are making use of progressive collapse analysis and hysteretic springs. LARSA software is the company standard at HDR and the standard in offices of Parsons Brinckerhoff and other renound firms. In India and the United Kingdom, new segmental and cable-stayed bridges are being designed by Halcrow using LARSA 4D's cables and tendons in a nonlinear analysis.

The LARSA team is continually developing and improving our software, staying one step ahead of our users' engineering needs. When you're ready to make the jump to the fifth dimension, we'll be waiting on the other side.

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Selected Features

Staged Construction Analysis

Staged construction analysis provides an integrated environment in which to model the changing state of a structure over time, including structural changes, load applications, and time-dependent material effects. [Read More]

Bridge Geometry Control

LARSA 4D has advanced tools for modeling segmental and curved bridges, reducing the user's dependence on unintegrated, specialized applications for defining geometry. [Read More]

Post-Tensioning with 3D Tendons

Tendons are modeled as three-dimensional curves and take into account the time-dependent properties of their materials, including creep, shrinkage, and relaxation. [Read More]

Influence Line and Surface Analysis

Influence Line and Surface Analysis in LARSA 4D simulate the application of live load to a structure on a design lane. Design lanes can take any path through a structure, curved or straight, with or without eccentricity. [Read More]

Parametric and Nonprismatic Sections

The Section Composer is an advanced tool for modeling cross-sectional properties using parametric section definitions. Parametric sections improve efficients by allowing reuse and resizing without computing the coordinates of the exterior shape. Parametric sections can be turned into nonprismatic sections by applying any user-provided formula to any parameter or point. [Read More]

Element Library and Load Types

LARSA's element library comprises basic elements including beams and plates, seismic elements, and inelastic elements. [Read More]

Basic Analysis Types

LARSA's basic analysis types fulfill a wide range of uses, from a simple static analysis to an earthquake analysis of bridges and buildings. [Read More]

Advanced Analysis Types

Projects need the advanced analysis types only found in LARSA 2000/4D. These features take bridge and building projects to the next dimension. [Read More]

Using LARSA 4D & Modeling Tools

All of the tools you'll need to create your structures can be found within LARSA. [Read More]

Getting Results

Beyond graphics and spreadsheets, LARSA 2000/4D provides a number of unique tools for processing analysis results. [Read More]