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Linear Elastic Static Analysis|
The linear elastic static analysis is a first order analysis that excludes nonlinearity. Linear static analysis can compute the response of the structure to various types of static loads in the form of self weight, joint loads, joint displacements, loads applied to beam elements, thermal loads applied to beam, truss and cable elements, and surface and thermal loads applied on plate and shell elements.
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Nonlinear Static Analysis-
More and more structures demand that geometric and material nonlinearities be considered for more accurate design. The geometric nonlinearity in LARSA 2000 includes both the change in geometry and the effects of geometric stiffening such as that encountered when a cable or a thin member is stressed in tension.
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P-Delta Analysis-
A very basic form of a nonlinear static analyis based on Newton-Raphson and tangent stiffness.
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Eigenvalue Analysis|
The eigenvalue analysis is performed to extract the natural frequencies and mode shapes of a structure. Eigenvalue analysis is important as a predecessor to any dynamic analysis because knowledge of the structure's natural frequencies and modes can help to characterize its dynamic response.
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Response Spectra Analysis-
This analysis can be used to determine the response of a structure to shock loading conditions for seismic analysis. Response spectra cases can have modal combinations of Complete Quadratic Combination or Square Root of Sum of Squares and spacial combinations of Square Root of Sum of Squares or Absolute Sum.
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Linear Time History Analysis-
The time history analysis computes the response of the structure to time-dependent loads which are specified as excitation records. Excitation records may be in the form of force, displacement, or acceleration and can be applied to one or more joints.
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Moving Load Analysis|
Moving Load Analysis simulates the movement of a vehicle or multiple vehicles passing over a structure. It provides a powerful method of generating the load cases for vehicles moving on user-defined paths. Vehicle paths can be curved and can pass through members and plates. Users can define their own vehicles or use one of the many standard patterns provided. The moving load analysis can be both linear and nonlinear. AASHTO and IRC vehicle definitions are provided with LARSA.
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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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Units-
Input and results data can be entered and viewed in any metric or English unit. Conversions can be performed at any time.
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