The PLT application is intended for the analysis of plate structures of any kind according to the finite element method. The powerful graphic user interface provides numerous functions for the fast and efficient processing of this complex calculation model.
Standards
DIN EN 1992, ÖNORM EN 1992, BS EN 1992, NTC EN 1992, EN 1992, DIN 1045 / DIN 10451, ÖNorm B 4700
PLT features
 Any outline composed of straight and curved edges can be defined
 Calculation of any plate whether susceptible to torsion or not.
 Plate joints
 Optional consideration of shear deformations of thick plates
 Calculation of the deformations in state II
 Bending and shear design
 Crack width verification
 Automatic FE mesh generation
 Freely definable support conditions, spring rigidity can be calculated automatically
 Optional automatic recalculation of the spring rigidity of vertical components after editing (e.g. the storey height or the wall properties)
 Integrated beams with scalable bending rigidity
 Definition of any concentrated, distributed, line or temperature load
 Design situations due to earthquakes
 Comprehensive evaluation and representation options for the results, either in an output grid independent of the FE mesh, via ISO lines or along the result sections, if
 required
Graphic user interface
 Objectoriented input including components
 Fast input of even sophisticated outlines and unlimited editing options as well as comprehensive functions (move, copy, mirror, etc.)
 Direct import of geometric data from the CAD applications ALLPLAN and GLASER isb cad
 DXF data can be used as construction aid in the background
Design / material
 Automatic design of the plate as well as the beams when using reinforced concrete
 If you do not perform a design, you can define any orthotropic material
 Data transfer to the applications DLT for the beam design and B6+ for the punching shear analysis of columns
Area definitions
 Supporting direction areas for the definition of uniaxial supporting areas
 Bedding areas for elastic bedding, you can optionally define bedding failure
 Reinforcement areas for the defi nition of a basic reinforcement and the setting of rotated reinforcement directions by default
 Thickness areas to describe partial plate areas with different thicknesses
Supports
Point or line supports are generated via the objects column and wall, whereby the application automatically calculates the real rigidity values, if the corresponding option was activated. There are several representation options for the bearing reactions at walls, either in the form of various diagrams in kN per linear metre or in the form of points along the wall axis. You can optionally include tension spring failure for columns and walls in the calculation.
Loads
You can define single, line, distributed and temperature loads in any layout.
Mesh generator
The automatic mesh generator allows you to generate meshes with triangular and rectangular elements as well as mixed meshes.
FE analysis
The plate elements include displacement and stress approaches. A considerable benefit of these socalled hybrid elements is their accuracy with thin plates that are frequently used in building construction. Alternatively, elements in accordance with the ReissnerMindlin theorem are used for thick plates. They include the shear deformations. Superposition
The PLT application includes a fully automatic superposition feature that takes the selected regulation into account. The user can exclude particular load cases from the superposition. Each load case is assigned to a group of actions. On the basis of this assignment, the application calculates the decisive load combination including a corresponding leading ation. You can optionally perform the calculation with alternative load cases.


Tbeams
Tbeams are considered by adding the rigidity terms along the beam axis. Since the plate elements do not include normal forces, the gravity axis of the beam elements is assumed to lie in the plate plane. The rigidities are calculated using Steiner portions. The beam rigidity can be increased by entering a factor.
Bending design of reinforced concrete The design of the reinforcement is performed in accordance with the Baumann method. A cracked plate element is used as a model. The design approach assumes an orthogonal mesh reinforcement. The reinforcement direction is freely definable.
Shear design of reinforced concrete
The shear design is based on a bar structure model whereby the longitudinal reinforcement is taken into account. You can define by default any longitudinal reinforcement over the total plate outline to accelerate the analysis. The results reveal quickly where shear reinforcement can be avoided by increasing the longitudinal reinforcement.
Representation of the results
All results are shown at any grid point or along sections independently of the generated element mesh. The section representation also includes an overview of all results at a particular section. You can also display the results in the form of ISO lines.
Reinforcement data transfer
Reinforcement data are transferred in an open data format referred to as ASF. The use of these data in the target system is independent of theavailable system functions.
FEM results transfer
The ASF format allows the transfer of all data produced in the FEM calculation. These data provide for the visualization of all results in the CAD system ALLPLAN.
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