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Stressed Eigenvalue Analysis-
The stressed eigenvalue analysis is an extension to the basic eigenvalue analysis. The stiffness matrix includes the effects of static loads (stress stiffening) and the deformed geometry of the structure, unlike the basic eigenvalue analysis.
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Nonlinear Time History Analysis|
The nonlinear time history analysis is an extension to its linear counterpart, computing the response of a structure to time-dependent loads taking into account geometric and material nonlinearity. This analysis is invaluable for cable-stayed and segmental bridge projects, in which nonlinearity plays a vital role.
The analysis is carried out by using a combination of the Newmark-Beta time integration algorithm and either full or modified Newton-Raphson method, using iterations within each integration time-step.
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Plastic Pushover and Nonlinear Buckling|
Plastic pushover analysis is a simplified form of progressive collapse. Plastic pushover performs a nonlinear inelastic analysis on a load case, continuously loading the structure until a stopping criterion is met. The criterion is a maximum displacement at a particular joint in a particular direction.
The progressive collapse analysis uses arc length and auto-stepping for post-buckling strength.
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Influence Line and Surface Analysis-
Influence line and surface analysis is an extension to the moving load analysis used when permutations of vehicle size, position, and number need to be processed. Influence based analysis finds the worst case scenario for a large number of permutations in a fraction of the time it would take using a moving load analysis.
See Influence Line and Analysis for more information.
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Staged Construction Analysis-
Staged construction analysis is a new way to analyze a structure through time. No longer do you need to have dozens of files one for each state of the structure during its construction. LARSA understands new "construction activities," which include assembling and casting elements, applying loads, changing support conditions, stressing post-tensioning tendons, and much more.
See Staged Construction Analysis for more information.
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Element Library-
All of the analysis types on this page support a wide array of elements in LARSA's element library, including beams, cables, plates & shells, composite elements, springs, hysteretic beams and hysteretic springs, isolators and bearings, and tendons.
See Element Library for more information.
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