LIRA-FEM 2025 R2 Update 2

LIRA-CAD

• Restored option to specify a fixed step for triangulation points in slabs via the properties of the bar analogue.
• Fixed cases of program failure when transferring a model to LIRA-FEM.
• Fixed bug: the load from a space was duplicated if a slab with an opening was located below it and another slab was placed within that opening.
• Restored option to consider the openings in spaces that are interpreted as loads.
• Improved the conversion function: walls are now converted into beams with the beam axis coinciding with the axis of the original wall.
• Fixed bug: when the Real volumes parameter is activated, it caused the option for perfectly rigid body (PRB) generation to remain active even after the parameter was changed.
• Fixed bug: the design material properties of capitals and column bases were not transferred to or assigned in LIRA-FEM.
• Fixed bug: when column bases and capitals are selected in groups in the Parameters dialog box.
• Fixed bug: incorrect object links when copying nodes in the Generator system.
• Improved performance of the shader-based graphics on professional NVIDIA graphics cards.
• Restored option to generate the load with the custom node Linearly distributed load on objects (Services tab).
• Fixed bug in importing cross-sections in *.saf format in case the section width and height were swapped.
• Fixed bug in transferring Triangulation and Stiffness parameter values for Plate object to the design model.
• Fixed bug in selecting Spaces after the *.ifc import via the Generator system.
• Fixed bug: incorrect generation of impulse diagram by the Blast node in certain cases.
• Fixed bug: program failure that occurred when the Skews command was activated.
• Extended program response to changes in units of measurement across multiple systems of the program, including Elastic support, Snow mound, Spring, Load summation, etc.
• Fixed bug: program failure that occurred when working with column bases.
• Fixed bug: incorrect behaviour of an opening in an inclined slab.
• Fixed bug: in replacing a Special element with a Perfectly Rigid Body (PRB) when the model is transferred to LIRA-FEM.
• Fixed bug: incorrect calculation of corner reinforcement in the Reinforcement type dialog box.
• Enhanced the algorithm for collecting wind loads on side surfaces of the building.
• Improved behaviour of openings with non-standard geometry in walls.
• Fixed bug: program failure that occurred when checking pit alignment.
• Fixed bug: roof triangulation when using the Proxy object interpretation for loads.

LIRA-FEM

• Redesigned finite elements for thick slabs so that the shear locking is eliminated. As a result, correct behaviour of thick slabs is ensured for small thickness-to-span ratios typical of thin slabs, without loss of analysis accuracy.
• For the METEOR system, corrected load case numbering in the text result tables for DCF and DCL(c). It occurred when combining results of standard analyses with time-history analyses.
• Fixed data sorting in columns of input tables (column data were not sorted if the column No. exceeded the number of rows in the table).
• Fixed bug: program failure when checking pilot reinforcement (PR) in cases where reinforcement pattern in the section was defined using the condition "distance to gravity centre of reinforcement - from materials".
• Fixed bug: program failure after converting super-elements into fragments of design model and performing model packing.
• Fixed downloading of problem file that contains stiffness for orthotropic plates specified via the elasticity matrix.
• Corrected procedure for a data saving in the Borehole table dialog box (in the SOIL system) when there is a deleted comment row.
• Clarified relation between the section class and the utilization ratio for local buckling of flanges and webs according to SP RK EN 1993-1-1:2005/2011.
• Fixed bug: in determining the DCL table number during iterative refinement of pile stiffness.
• A shortened name for calculation type is implemented in materials for reinforced concrete (RC) plates.
• Restored option to check and select the steel sections composed of double channels with a gap between the webs.
• Accelerated lengthy packing for a large number of unique loads (with load-time histories) in problems with time history analysis.
• Fixed bug: program failure when synchronising result views for two problems with time history analysis.
• Fixed bug: after renaming a problem in the Model type dialog box, data in the Report Book remained linked to the previous directory on disk.
• For DBN B.2.6-198:2014, corrected the algorithm for checking steel sections, and refined the overall stability analysis for built-up laced columns made of angles.
• For DBN B.2.6-198:2014, fixed the assignment of ultimate slenderness values when changing element types of steel trusses and columns.