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