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
- RC Expert
- Analysis & design of steel structures
- Soil
- Cross-Section Design Toolkit
- Documentation improvements
LIRA-FEM 2025 R2 Update 1
- Restored import of spaces from IFC files (spaces above the first floor were not imported).
- Fixed bug where only floors were generated during IFC import, but the structural objects of the building were not loaded.
- New command Allow Intersections to cancel the No Intersection command. The command supports the work with a group of selected objects. Previously, the prohibition of intersections could only be removed through Manage Links dialog box.
- Fixed bug: the height of the retaining wall changed if there is a pit with walls in the model.
- Fixed bug: the specified levels were not transferred when a building is copied from one model to another.
- Improved algorithm for generating a triangulation mesh at the intersection of walls, and at the intersection of walls and slabs.
- Improved algorithm for generating perfectly rigid body (PRB) in the zone of intersection between slabs and walls.
- Improved algorithm for generating the combined behaviour of walls and slabs in cases where the wall is very close to the slab edge but not absolutely parallel to it.
- Fixed bug: program failure when saving a project in previous version of LIRA-CAD module.
- Fixed bug: program failure when changing parameters of a load-bearing wall to load type and assigning a user-defined material.
- Fixed bug: program failure when interacting between LIRA-CAD and Grasshopper nodes.
- Fixed bug: the loads were duplicated in floor slabs, stairs, and prisms when transferring a model from LIRA-CAD module.
- Fixed bug: the loads (forced displacement along a line, bimoment along a line, harmonic load at a node, and warping) were not transferred to LIRA-FEM.
- Fixed bug: incorrect switching between project floors.
- Fixed bug: in the blast node, modified algorithm for applying loads to objects of the model.
- Fixed bug: columns were lost when saving a project to SAPFIR-3D 2021
- Fixed bug: a beam (modelled as a bar analogue with plates in the horizontal plane) generated an incorrect stiffness description in LIRA-FEM
- Fixed bug: special elements cannot be transferred to LIRA-FEM
- Fixed bug: the procedure for export of the model to an IFC file was slowed down.
- Enhanced auto-snap of loads from space to floor slabs and inclined slabs (loads were incorrectly linked to inclined slab).
- New option to insert a vertex into a circle (in wall and slab).
- Enhanced generation of wind load on floor slabs, displacement of a building along the height (that is specified in the building properties) is considered.
- Added option: rotation angle of the building (specified in the building’s properties) is considered in the following cases:
- for the meshed model of the retaining wall;
- for a single grid line in the meshed model;
- when generating a pit, copying from a base point, and mirror copying a pit.
- Improved link between punching analysis results and the floor slab when importing analysis results of reinforcement from LIRA-FEM. Previously, punching results from the floor slab may be incorrectly displayed on the view with reinforcement in foundation slab in cases where the floor slab and foundation slab were located on the same storey.
- Corrected presentation of rebar dowels from the foundation slab to the column when the base point of the column section is shifted relative to the centre of mass.
- Modified account of the hd parameter in the calculation of piles.
- Modified calculation of the Sp parameter with account of the pile widening.
- Modified option: group editing of elasticity matrix parameters when specifying the stiffness of orthotropic slabs with the elasticity matrix. The Undo/Redo commands are also modified.
- Modified procedure for updating the assigned values steel stiffness for profiles selected based on the results of steel analysis.
- Fixed bug: specified coordinates of the torsion centre for an unequal angle were lost when the steel tables were edited manually.
- Fixed bug: finding the moment of inertia for a cross (section) composed of angles.
- The warning message issued when the soil settlement Sp resulting from soil punching under the equivalent pile foundation is zero has been revised for clarity.
- When analysing piles, the computation of the Fd parameter has been refined for cases where no seismic action is defined in the model.
- When analysing a soil model with piles, the consideration of loads from excavated soil has been refined.
- Fixed bug: when creating a load from constructed soil.
- Accelerated transfer of unification groups of steel elements to the local STC mode for calculation of deflection.
- Fixed bug: the area of punching shear reinforcement was displayed incorrectly in the Information about node dialog box in case of an additional punching shear load contour in the node.
- The warning message issued when calculating the reserve factor for reinforcement according to SP PK EN 1992-1-1:2004/2011 (Republic of Kazakhstan) has been revised for clarity.
- When viewing standard tables with analysis results, the TXT and HTML formats have been restored.
- When calculating design combinations of forces (DCF), the generation of the E1 combination group has been restored (to account for progressive collapse).
- Restored option: to set the Req parameter in pile diameters when calculating piles.
- Modified calculation of pile stiffness when contours of equivalent foundations overlap.
- The handling of mutually exclusive load cases in the 'Combinations of loads and actions' system has been refined.
- Restored option: to create posters from the Report Book.
- Fixed bug: reconnecting to the LiraFEM.exe when using LIRA-FEM API objects.
- Fixed bug: possible incorrect transfer of forces in analysis of reinforcement in RC slabs.
- In check of RC sections by ultimate limit states, the 'Clarify pattern of crack propagation' parameter has been refined.
- Restored option: to display the graph of dynamic coefficient for dynamics modules 57 (DBN B.1.1-12:2014, Ukraine) and 58 (SNIP KR 20-02:2009, Kyrgyzstan).
- Fixed option: to find out the average value of uneven surface load when generating a mosaic plot with load values.
- Fixed bug: possible failure of Autodesk Revit when exporting an analytical model to LIRA-FEM.
- Restored option: to display analysis results for steel section by the serviceability limit state for several design options.
- Added option: to control the correctness of nodal loads when importing a meshed model created in LIRA-CAD module.
- Fixed bug: in calculating combinations of loads and actions when several DCL tables are generated from a single Combinations of loads and actions table.
- Fixed an infinite loop in the analysis of reinforcement for bar elements with a variable number of intermediate reinforcing items (DBN B.2.6-98:2009).
- Clarified identifier and snap for the punching shear contours of floor slabs and the load contours of foundation slabs created in LIRA-CAD module.
- Analysis of some steel sections is accelerated, improved accuracy in dividing steel structural elements into sub-elements.
- Values of calculated moments of inertia for some steel sections have been refined.
- Fixed bug: in calculating soil resistance when converting imported loads to the loads in the SOIL system.
- Fixed bug: in calculating soil resistance below the foundation base when there are several layers of soil under the base.
- Refined the determination of the compressible layer depth Hc when its lower boundary lies within weak soils.
- For fire resistance analysis problems, the order of parameters in the thermal load description line for the Thermal radiation conversion law has been clarified.
- Corrected option to transfer wind loads to Beam-type bar elements created in LIRA-CAD module to the FE design model.
- For problems with super-elements, restored option to display analysis results for principal and equivalent stresses for combinations of forces in plate elements inside super-elements.
- Refined the calculation of the weight of water-saturated soil in analyses of collapsible soils.
- Fixed bug: in text tables with analysis results for principal and equivalent stresses in problems that contain more than 500 combinations of forces.
- The ReSpectrum module for generating response spectra and converting accelerograms, seismograms, and velocigrams has been updated.
- When calculating the local buckling of steel elements, the procedure for selecting sections taking into account plasticity in seismic problems has been refined.
- Updated Ukrainian rolled steel tables (2025) have been added:
- channels (TU U 24.1-05393056-003:2020)
- rectangular and square pipes (DSTU 8940:2019, EN 10219)
- round pipes (DSTU 8943:2019)
- angles (DSTU 2251-2018, EN 10056-1:2017)
- Corrected labels for the x- and y-axes of the spectrum graph for the dynamics module 41 - Calculation by response spectrum method.
- Updated steel tables recommended by the USCC (Ukrainian Steel Construction Center).
- When generating tables with combinations of loads and actions, the default value for the coefficient for inactive loads has been corrected according to SP PK EN 1990:2002+A1:2005/2011.
- Fixed bug: possible failure when a design model (that contains nodal loads Time history analysis) is packed.
- Corrected processing of thermal loads in the solver.
- Clarified number of integration points when calculating shear stiffness in 4-node FE of a thick plate.
- Enhanced analysis of reinforcement according to Karpenko's theory for the 2nd and 5th patterns of crack propagation when tension dominates over tangential stresses.
- Refined the analysis of reinforcement for plates according to Karpenko’s theory when the generalised compressed-zone height exceeds the limit value.
- Increased tolerance to check the geometry when generating bar analogues (BA).
- The area of transverse reinforcement specified with pilot reinforcement (PR) has been refined.
- The calculation of the safety factor in combinations with progressive collapse has been corrected, taking into account the modified algorithm of neutral axis.
- Restored option to display the results for physically nonlinear analysis (iterative and step-type elements) for problems with time history analysis.