VERSION HISTORY
LIRA-FEM
- Components of BIM technology
- Generating and modifying the model
- Generating and modifying the design model
- Analysis options
- Tools for evaluation of object properties and analysis results
- Analysis & design of reinforced concrete (RC) structures
- Analysis & design of steel structures
- Soil
- Cross-Section Design Toolkit
- Drawing improvements
- Documentation improvements
- Localization and regional settings
- Other improvements
Finite element "Joint"
The option "Unloading with initial stiffness" is added for the FE of joint. Unloading is performed by an elastic-plastic model with initial stiffness from the point of the current state. Re-loading is performed along the path of the previous unloading, so the joint will return to the point with the maximum strain that was achieved earlier. The relationship between the vertical stiffness and the shear stiffness for the FE of joint is shown in the figure below.
Behaviour of the FE of joint during unloading (vertical and shear stiffness)