5.9.0 with unique capabilites will be released this summer
users and prospects,
we hope you
are doing well, staying safe and healthy.
ATENA 5.7 version already represented a huge step forward with some
remarkable new features such as ASR, corrosion or durability
modelling. Before we finished the previous version, we had already started
working on ATENA 5.9 knowing that we would like to enhance the existing
features as well as add some new ones.
announce that have successfully accomplished our mission by preparing a new ATENA 5.9.
for you. Not only did we further develop and tested the reinforcement
modelling and durability, but we also added some exciting new features such
as 3D printing of concrete, improving our program interface (ATENA Center)
in order to simplify the navigation through ATENA, and modifying the
program protection system, by enabling you to use software hardlocks
instead of regular USB protection keys. It means accessing ATENA is now a
lot easier, especially for those who have to deal with difficult custom
processes when we are shipping the software to their attention.
Do not miss a
chance to evaluate a 5.9. beta version by renewing your ATENA maintenance license.
In case you are actively using ATENA and your maintenance is valid, please
do not hesitate to ask us to test this new beta version or follow the news
on our website.
you to send us your comments or tips for improvements. This would be highly
appreciated. Thank you in advance.
forward to continuing our cooperation and launching new partnerships with
those of you who are not yet ATENA users.
regards from Prague
Your Cervenka Team
v5.9.0 new features
ATENA v5.9.0 will be
released in May as a public beta version. All users with valid maintenance
support are eligible for downloading and evaluating this new step in ATENA
it contains the following major new developments and changes:
- ATENA Center
is a new frontend interface, which provides an easy navigation through
various ATENA system software tools, tutorials, documentation and example
- 3D printing
modelling of concrete can be simulated by ATENA now. In
addition to the numerical model, the user can provide the printing path and
printing speed along with time dependent material properties to simulate
the printing process. This new feature can be used to simulate and verify
the structural stability during the printing process or the behavior of the
final structure taking into account the effect of the printing process on
its final strength, reliability or durability.
1: ATENA Center for easy navigation and access to programs, tools,
documentation, tutorials and examples.
2: Modelling of 3D printing is one of the main new features in ATENA. The
figure shows the cracking in the simulation of a 3D printed concrete
segment for a pilot building in Czech Republic.
- APIS FRC –
new tool for the automatic determination of input data for Fibre-reinforced
concrete materials (FRC) from standard three or four point bending tests.
report generation allows for tailored generation of typical
reports that can be further customized or enhanced based on the
requirements of each project you are working on.
- Durability and corrosion
modelling has been enhanced and input dialogs are
simplified with generation wizards and help tools for easier definition of
input parameters for chloride ingress, carbonation and corrosion modelling.
- New reinforcement cycling material
was implemented on the basis of Dodds & Restrepo model, which
supports more intuitive definition of input parameters for dynamic and
seismic analysis of RC structures. In addition, the cycling reinforcement
models are available now also for the smeared reinforcement model.
- Improved reinforcement bond
model can consider the effect of reinforcement corrosion or
temperatures during fire analysis on the bond strength.
This means the provided slip law is scaled by temperature and corrosion
hardlocks are available for ATENA in addition to the
standard USB protection hardlocks. This simplifies the distribution as
there is no need for any shipping, and this option can be also advantageous
for network installations.
- Plus many
other minor improvements, additional increase in analysis and post-processing
speed for large scale models, and various bug fixes.
Červenka, V., Červenka, J.: Biomechanical Simulation of Peyronie’s Disease, Applied
Bionics and Biomechanics, vol. 2021, Article ID 6669822, 6 pages, 2021, https://doi.org/10.1155/2021/6669822.
shows ATENA application to biomechanics. A pathological disorder of human penile
function, known as Peyronie’s disease, is characterized by the formation of
plaque particles within the tunica albuginea. The plagues in the shape of
rigid plate form in the scars as a result of the imperfect healing process.
3: Mesh discretization of the penis model.
4: Von Mises stress distribution in tunica albuginea with plague. Case A.
Due to high
stiffness, plagues are the source of pain and anomalous deformations during
erectile penis function. The authors simulate the biomechanical behavior of
the penile structure by a 3D finite element model. The numerical model is
based on the real geometrical shape and the tissue structure with
consideration of large nonlinear deformations.
erection is modeled by the initial strains imposed on the corpus cavernosa.
The stress analysis is performed in a case study of various plague
locations. The Peyronie’s syndrome manifested by the penis angular
deviation simulated by the analysis is compared with the clinical data. The
computational simulations provide a rational explanation for the clinical
observations on patients. The objective is to apply the proposed modeling
approach for the development and validation of treatment methods based on
the application of shock waves.
5: Deformed state of the penis in scale 1 : 1 showing angular deformation due to
6: Crack pattern at peak load 148kN, cracks > 0.05 mm in the static
A., Kalfat, R., Al-Mahaidi, R., Cervenka J., Pryl, D.: Numerical and experimental
investigation into the fatigue life of FRP bonded to concrete and anchored
with bidirectional fabric patches, Elsevier Ltd., 4/2021, https://doi.org/10.1016/j.engstruct.2021.112335.
shows application of ATENA fatigue model. It presents a summary of numerical and
experimental investigations conducted to evaluate the fatigue performance
of externally-bonded FRP laminates anchored with bidirectional fibre patch
anchors. The anchored laminates were bonded to reinforced concrete (RC)
blocks and subjected to various cyclic loading scenarios. Parameters such
as the stress range, peak cyclic stress level, and the corresponding number
of cycles prior to failure were noted. The results were used to generate an
S-N curve relationships.
A finite element model was developed and calibrated based on the
experimental results. Modelling of experimental specimens was performed
using the ATENA Science program for non-linear FEA in RC structures.
Calibrated control and anchored models were developed to represent the
actual specimen used in the experimental test. For validation purposes, all
the material properties used in the calibration of FEA were based on
experimental measurements as well as theoretical models and research
findings. The simulations showed successful calibration modelling of static
and fatigue tests that produced good correlations with the experimental
measurements on the basis of ultimate static capacity, fatigue number of
cycles, strain readings, and mode of failure.
ATENA modelling of anchored FRP strengthening tests in static and fatigue
loading you can see in this video.
7: Deformed shape and crack widths after failure due to fatigue loading.
8: Example of deteriorated Gerber saddles in RC road bridges.
G., Masi A., Picciano V.: Durability of Gerber Saddles in RC Bridges: Analyses and Applications
(Musmeci Bridge, Italy), Infrastructures 2021, 6, 25., https://www.mdpi.com/2412-3811/6/2/25
ATENA durability model
has been used in this interesting paper on assessment of safety levels of
critical infrastructures such as bridges that are essential to modern
societies and their vital services. Bridges with reinforced concrete
structures are subject to deterioration due to corrosion. Gerber saddles
are among the key components which are especially exposed to environmental
actions. In this paper, a framework for the durability analysis of these
components is proposed, considering the simultaneous presence of permanent
loads and environmental actions under the form of chloride ions. Nonlinear
numerical simulations adopting the finite element code ATENA are performed,
accounting for chloride ingress analyses. The presence of cracks (due to
applied loads and/or design/construction defects) which may speed-up
corrosion propagation, steel reinforcement loss, cracking and spalling, and
their effects on the load-bearing capacity is considered.
framework has been applied to the Gerber saddles of a prominent reinforced
concrete (RC) bridge, namely the Musmeci bridge in Potenza, Italy.
Durability analyses made it possible to evaluate the saddles’ strength
capacity at the time of construction, after forty-five years since the
construction, and at an extended time of fifty years. The results show that
corrosion can influence both the ultimate load capacity and the collapse
9: (a) Crack pattern and (b) reinforcement stress distribution at peak load
considering ATENA new reinforcement corrosion model.
and Development Projects
completed in 2020