LIRA-SAPR 2019

The new version of structural analysis software LIRA-SAPR 2019 is available: analysis, design, simulation of the life cycle of building structures.

April 17, 2019


FEM-solver

  • Matrix decomposition (factorization) is speeded up. For processors GenuineIntel, Intel(R) Core(TM) i7 CPU 960 @ 3.20GHz, 4 physical cores, 8 logical cores, RAM 10 Gb, acceleration is from 1.6 to 2.8 times. For processors GenuineIntel, Intel(R) Core(TM) i7-8700K CPU @ 3.70GHz, 6 physical cores, 12 logical cores, RAM 16 Gb, acceleration is from 2.5 to 4.2 times. For example, matrix decomposition for mixed (braced and unbraced) frames in high-rise buildings (5,300,000 unknowns) with the second one from the above-mentioned processors takes 16 minutes.

Mixed (braced and unbraced) frames in high-rise buildings (5,300,000 unknowns)

Mixed (braced and unbraced) frames in high-rise buildings (5,300,000 unknowns)

  • Finite elements of MindlinReissner theory (thick slab) are enhanced. Test examples show more exact results in comparison with other realizations.

Design models for verification of FE of thick slab

Design models for verification of FE of thick slab

Graph for convergence between output data for FE of thick slab and analytical solution

Graph for convergence between output data for FE of thick slab and analytical solution

  • In parameters for earthquake analysis, new option to define the total percentage of modal masses that should be accumulated, while in parameters for wind analysis with pulsation whether it is necessary to achieve the ultimate frequency. Natural vibrations are not computed if the specified number of mode shapes is reached or above-mentioned conditions are satisfied, whichever is earlier. You could define number of mode shapes as the very large number, and then it would be practically ignored as criterion for not computing natural vibrations.

Parameters for earthquake analysis

Parameters for earthquake analysis

  • Wind analysis with pulsation is available for SP 20.13330.2016 with modifications No.1 (module 21).
  • When computing natural vibrations, the program considers eccentricities defined to masses concentrated at nodes of the model. This option is available for all modules of Dynamics.
  • Stiffness parameters of design model may be modified according to user-defined coefficients.
  • New methods are presented for simulation of steady-state and transient heat transfer. New model type is introduced, special finite elements are available.

New FE types for solving heat transfer problems

New FE types for solving heat transfer problems

Steel Structures

  • For I-shaped bar with variable cross-section the program provides check according to ultimate and serviceability limit states. The check enables the user to make sure that steel structures defined in the design model will take the specified load. Output data may be presented in graphical and tabular formats. Variable sections of steel beam may be determined with: variable height of the web, variable widths of flanges and their variations.

New stiffness type in database of steel sections

New stiffness type in database of steel sections

  • Selection and check for sections of solid thin-walled shapes according to SP 260.1325800.2016.
  • New option to define the steel grade for the group of elements or to the whole model regardless of the cross-section type.

Reinforced Concrete (RC) Structures

  • For bar elements, new analysis algorithm 'Ribbed slab' is provided. New user interface is presented to determine max allowed overhangs in flanges; in this case offsets are automatically assigned for bars (ribs). In analysis of reinforcement the program corrects dimensions for the section (overhangs are determined) for every set of forces in slab, these forces are converted to the type of forces acting in bar.
  • Advanced tools are provided to define actual reinforcement pattern in complex sections. This option is available for physical & geometric nonlinear analyses, for NL engineering and to check the bearing capacity for bar sections according to valid building codes.

Option to generate and edit types of pilot reinforcement (PR) (complex section)

Option to generate and edit types of pilot reinforcement (PR) (complex section)

  • New algorithm is provided for strength analysis of RC sections by Wood theory according to SP 63.13330.2012. This algorithm enables the user to speed up analysis time and obtain improved output data as to area of reinforcement in plate elements.
  • Module for local analysis of RC structures is modified. New LARM-SAPR module enables the user to generate and preview forces in the manner similar to VISOR-SAPR module. New option is provided to define forces from combinations of type A1 - D1 for strength analysis and combinations of type A 2 - D2 to check width of crack propagation. It is also possible to define composite sections, types of pilot reinforcement (PR), parameters to analyse ribs in plates and parameters for fire resistance.
  • Analysis of composite columns according to DBN B.2.6-160:2010 is supported.
  • A set of design requirements is considered for EN 1992-1-1:2004/2011 in analysis of reinforcement.

Fire Resistance

  • New algorithm for analysis of reinforcement to provide required ultimate fire resistance. Nonlinear deformation theory by CTO 36554501-006-2006 is applied in this algorithm. Solution of this problem includes the following aspects:
    • computing distribution of temperatures across the section according to the specified time period in fire conditions;
    • further modification of physical and mechanical properties of materials according to obtained temperature fields;
    • check of bearing capacity of structure elements in normal load and, in case conditions are not adequate, increasing of reinforcement.
    Fire resistance analysis is available for standard types of sections (rectangle, ring, T-section, I-section, etc.), composite (rectangular concrete section with different patterns of stiff reinforcement and different pipe concrete sections) and plate elements.
  • It is possible to define parameters for thermal actions and then evaluate distribution of temperatures along the section. At the stage of generation of design model the user could evaluate defined location of rebars in order to avoid their overheating up to critical temperature.

more on the blog: Fire resistance

Ultimate fire resistance and fire exposure time

Ultimate fire resistance and fire exposure time

Output data for analysis of reinforcement may be presented as appropriate mosaic plots (for bar and plate elements separately). Appropriate rows are also added in the tables of selected reinforcement.

Changes in temperature within the element section

Changes in temperature within the element section

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