VERSION HISTORY
LIRA-FEM
- Mass redistribution
- Damping ratio
- Seismic isolators
- Pushover Analysis
- Finite element "Joint"
- New types of perfectly rigid body (PRB)
- Nonlinear behaviour of soil
- New type of force
- Nonlinear custom cross-sections
- Accounting for orthotropy
- Analysis parameters
- Analysis of reactions
- Stresses and forces
- Dynamics
- Nonlinearity
- Finite elements
- Calculation and Performance
Nonlinear analysis
- Modified the general algorithm of nonlinear iterative analysis. Updated accuracy criteria and iteration control logic which reduces the number of inefficient iterations and shortens calculation time.
- Diagrams for behavior of nonlinear elastic restraints (FE 295/296) can now be extended to ordinate 0, thus modeling failure/deactivation of restraints.
- Modernized the operation of iterative bar and plate FEs within the nonlinear deformation model, including adjustments to unloading algorithms, force calculations, and consideration of nonlinear material properties.