GSA Analysis

 

GSA Analysis Types

 

 

Overview

 

GSA offers a wide range of structural analysis types

 

  • Static analysis

    • Linear Static

    • Static P-delta (p-delta by own load case, different load case, or previous analysis case)

    • Non-linear static

  • Dynamic analysis

    • Modal

    • Modal P-delta

    • Ritz

    • Ritz P-delta

  • Dynamic Response

    • Response spectrum

    • Harmonic

    • Linear Time History

    • Footfall 

  • Buckling

    • Modal / eigenvalue

    • Non-linear member buckling

  • Mass analysis

  • Form Finding

  • Analysis envelope

  • Model stability diagnostic analysis

 

Analysis features:

 

  • Wizards to guide users in setting up data and analyses

  • Solution methods

    • Sparse Direct & Sparse Parallel Direct

    • Conjugate Gradient

    • Active column

    • Dynamic relaxation

  • 2D skeletal frame and grid analysis

  • 3D skeletal frame and shell structural analysis

  • Non-linear

    • Strut and tie elements, fabric elements

    • Materials

    • Load increments

  • Analysis in construction stages

  • Two dimensional and axisymmetric analysis

  • Large capacity

  • Efficient and stable solution algorithms

  • Analysis of applied load, applied displacements and settlements

  • Export of data to other analysis programs

  • Selective storage of results

  • Element pre-load by prestress for initial p-delta effects

 

Analysis stage specification:

 

  • included elements per stage

  • element properties per stage

  • constraints per stage

 

When an analysis is requested the data are checked for inter-module consistency. If errors are detected, a report is prepared and the program returns to the data editing options; if not, the program proceeds with the analysis with progress being reported to the screen throughout

 

Analysis control

 

  • analysis is specified and controlled by analysis tasks

  • default analysis task is set up automatically for typical analysis: linear static analysis of all load cases

  • explicitly defined analysis tasks are defined via the analysis wizard

  • pre-analysis data checks check for inter-module consistency, reporting to the report view

  • report view messages link to related data

  • pre-analysis checks can be invoked explicitly

  • several analysis tasks can be queued for batch analysis

 

Case control

 

  • Load cases

    • load container

  • Analysis cases

    • result container

    • may be described in terms of compound load cases

  • Combination cases

    • described in terms of compound analysis cases

    • descriptions may reference other combinations

    • results calculated for combination cases on-the-fly

  • Enveloping

    • described as a special combination case

    • analysis envelopes enable enveloped results to be stored