ATENA version 5.3

Since version 5 ATENA includes a new product ATENA Studio, which brings the run-time control and post-processing comfort to a new level, which surpasses the high standard that was previously introduced by our ATENA Engineering 2D & 3D software. In version 5, there is no need to import results to GiD for post-processing.

The key ATENA v5 features are:

 ATENA Studio :

  • a unified run-time and post-processing program. This unique program allows full-blown post-processing even while the analysis is in progress
  • the unmatched ATENA crack visualization is now also available in ATENA Science
  • the new cut and clipping planes for visualization of results inside the analyzed structure
  • the new selection feature allows a seamless control of the text output of selected quantities at selected locations
  • a new animation feature is now directly in ATENA, so there is no need to use GiD for post-processing
  • activities/layers  streamline the visualization of complicated 3D results. Activities can be also defined according to a value range of a selected output quantity
  • the contour plots are available for a rich set of output quantities at nodes, elements as well as integration points
  • a unique visualization of integration point quantities
  • 2D graphs can be used to display the evolution of ATENA monitoring points during the analysis. In ATENA Studio, a monitoring point can be created even after the analysis is computed, and the data are automatically extracted from the saved results
  • the signal option for locating individual nodes,  elements and supported or loaded nodes

The new release of ATENA software, version 5.3 brings you many new exciting features:

(a) improved robustness and validation of ATENA for seismic and dynamic analyses
(b) support for the new Austrian tunnelling method
(c) improved 3D beam elements for efficient modelling of large scale high rise building frames
(d) improvements in high-cycle fatigue model for concrete in tension
(e) support for parametric definitions in ATENA input/command file
(f) new extrude option enables pure brick meshes in extruded regions in ATENA 3D
(g) probabilistic module SARA/RLACS available also for ATENA Science
(h) plus many other improvements, corrections and bug fixes in ATENA 2D/3D, GiD Interface, ATENA Science and ATENA Studio.

 

(a) Improved robustness and validation of ATENA software for seismic and dynamic analyses. The dynamic capabilities of the new ATENA version has been tested to improve the program efficiency and robustness for analysing seismic problems. ATENA can be used now to perform static pushover analysis as well as subjecting the structure to the ground motion and evaluate its behaviour under this complex scenario using all available nonlinear models for concrete, masonry, steel or interfaces. The Fig.1 shows the program response in the two storey building experiment performed at ISPRA during the ESECMaSE project. See video here.

(b) Support for the new Austrian tunnelling method is included in ATENA Science now. The user can define the activation or removal of parts the structural model to simulate the various construction cases. The redistribution of the forces between the removed parts and the new ones can be controlled through user defined parameters.


Fig.1: Simulation of seismic experiment in ISPRA                   Fig.2: Simple example of tunnel construction process modelling in ATENA Science
laboratories

(c) Improved 3D beam elements increase the program efficiency in handling large scale models of multi-storey frame structures such as high rise buildings. The 3D beam elements can be used in combination with shell and/or solid elements to create efficient models for large scale analysis of frame structures. In the ideal approach, the bending elements are modelled using these special beam or plate/shell elements. The beam-column joints where shear failure mode can be expected should be modelled using solid elements. Similar modelling approach can be also used at the column-plate connections, where the punching failure mode should be verified by a finer model with solid elements (Fig. 3). The ATENA beam and shell elements can be easily combined with solid elements such that the most comprehensive, accurate and efficient approach could be use for checking your structures.

(d) Improvements in ATENA fatigue model for effective simulation of high cycle fatigue of concrete in tension. This fatigue model has been further improved to increase its robustness. The basic idea of this model is to simulate the effect of high-cycle fatigue, but using only a limited number of cycles. The model of your structure is subjected to several load cycles. Each cycle effectively represents several hundred or thousands of cycles, and the corresponding damage is calculated based on this information. This unique approach enables efficient evaluation of the fatigue damage as well as the damage distribution during the loading process. Have a look for yourself at Fig.4, how this fatigue model was used to analyse the fatigue strength of a carbon fibre sheet connection to concrete.


Fig.3: Example of building analysis in new ATENA                 Fig.4: Example fatigue analysis from project at Swinburne University of Technology by Mr.
using the combination of the new 3D beam elements             Atheer Al-Saoudi (Investigation of the Performance of FRP Anchorage Devices in RC
with 3D shell and solid elements                                             Bridge Beams Subjected to Fatigue Loading)
 

(e) Parametric definitions are now supported in the input/command file. In the new version of ATENA, it is possible to introduce mathematical operations, define and assign values to variables. This can be effectively used for batch processing and parametric definition of the numerical models for various parametric studies. See Fig.5 for a glimpse of the new parametric input in ATENA command file.

(f) Extrude meshing option in ATENA 3D. This very interesting new feature in ATENA 3D extends the type of macro-elements/regions for which brick elements (hexahedra) can be used. Any macro-element, which contains two opposite topologically identical surfaces, can be automatically meshed with brick (hexahedra) elements, which simplifies the modelling and increases the accuracy. Such macro-elements/regions are for instance typically created by the extrude operation (See Fig.6).


Fig.5: Example of parametric definition of material                    Fig.6: The right part of the figure shows the hexahedral mesh using the new extrude option
properties and structure geometry in ATENA input file              in ATENA v5.3, the left part shows the tetrahedral mesh in previous ATENA version

 

 

(g) Probabilistic module SARA/RLACS is available now also for ATENA Science. Any value in the ATENA  input/command file can be selected for randomization. The advanced probabilistic methods of FREET such as LHS, FORM, correlation matrix, simulated annealing can be used to perform accurate reliability prediction using the elite nonlinear models of ATENA. This totally new module is documented on the Fig.7 showing the full probabilistic evaluation of the design strength of a long-span (18 m) reinforced concrete girders with large openings.


Fig.7: Load displacement diagrams obtained by                      Fig.8: Lognormal distribution for load capacities obtained by probabilistic study
calculations in program RLACS and ATENA


Maintenance and support

We strongly support our users in their analytic work with ATENA. Support is mainly provided by email and phone calls. The solution to many questions can be found also in our FAQ & Online Forum. New versions of ATENA are released every year.

Maintenance is provided for free for one year after the software purchase. After that is it can be prolonged at annual rate coresponding to 15% of the program price.

  • System requirements

    • Minimum: PC with MS Windows XP SP2 / Windows Vista SP1, 512 MB RAM, 40 GB HDD, GPU with OpenGL 1.1 and 1024x768 resolution.
    • Recommended: PC with MS Windows 7, 64 bit 8 GB RAM, 500 GB HDD, GPU with OpenGL and HW acceleration, designed for CAD (nVidia FX, AMD FireGL, etc.)

    » Full product specifiaction & system requirements

 

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