friends of ATENA software,
we hope you are doing well and this year will be
successfull for you.
the year is slowly coming to its end, we suppose you are fully busy with
finishing your interesting projects on schedule. We would like to bring your
kind attention towards the latest development in our ATENA
software, which we strive to continuously develop in order to bring the
latest achievements in the numerical modeling of reinforced concrete to your
would also like share our success stories with you because they are written by
our users. By knowing their own ATENA experience, we can
analyze what we have done well and what should be improved. To meet our users'
needs, we regularly organize our ATENA seminar for our users to
get familiar with our software's capabilities.
We wish you pleasant
reading and we look forward to introducing you any further improvements in ATENA
in the upcoming year.
With kind regards from Prague
visualization of vectors and tensorial quantities in ATENA supports new options
for user adjustments so that beautiful as well as instructive figures can be
created to show for instance the stress flow inside the structure.
Release of ATENA Software Version
ATENA version 5.7
will be released this fall. It contains important improvements to the various
features introduced in the previous years. These improvements were triggered by
the feedback of our users and clients.
Better performance in solving and
post-processing large scale analysis
software is becoming the premier solution for checking the design or assessment
of large and safety critical structures. It is therefore often useful to develop
large scale complex models involving various element types: - 1D/3D beam
elements – 2D/3D shell elements – 2D/3D solid elements. ATENA supports standard
1D beam and 2D shell elements. In addition, it includes special 3D beam as well
as shell elements, with only displacement degrees of freedom. This simplifies
the development of complex large scale models, where it is useful to combine
beam and shell elements with solid elements. Beam and shell elements can be
effectively used in areas with dominantly bending behavior, while critical shear
dominated areas can be modeled by solid elements. Based on the feedback of ATENA
users as well as our own experience of using ATENA in large scale analysis of
tall buildings, we have improved the speed of analysis and
namely postprocessing almost 100 times compared to version 5.6.
Such large models are demonstrated in the figures in this newsletter, which
shows results from performance based design of a multistorey buildings supported
by nonlinear analysis.
modeling - new model for Alkali-silica-reaction in
Alkali-silica reaction (ASR) is a reaction in concrete
between alkali hydroxides and reactive siliceous aggregates.
from a pushover analysis of a reinforced concrete building, top - deformed shape
and crack pattern, bottom - stresses in the main reinforcement.
modeling of pushover analysis of a high rise building. Left bottom window shows
calculated crack widths and crack pattern. Right window shows the deformed shape
with the principal compressive stress in concrete.
process causes the development of expansion strain in concrete, which may cause
secondary cracking and can significantly reduce the concrete strength. This new
material is part of our ongoing effort to provide engineers with an efficient
tool to evaluate the durability of reinforced concrete structures. ATENA models
now cover the most important aspects of durability of reinforced concrete
structures such as chloride and carbonation process, reinforcement corrosion and
ASR. The durability features are all available now in the new version 5.7, and
they have been developed during a research project DURACERV funded by Czech
Technological Agency under the project #TA04031458.
in the run-time and post-processor program ATENA Studio
has by now become the most popular software in the ATENA simulation system. It
allows runtime visualization of the analysis process as well as full
post-processing capabilities even while the analysis is still running and the
iterative process is not yet completed.
very useful insight into the iterative process helps to discover any modeling
errors and gives useful hints how to eliminate any divergence problems. This
program has been further improved in the version 5.7.
main improvements are:
- faster post-processing of large scale
models, speed increase almost 100 times
- new display of local element
coordinate systems, especially useful for beam and shell elements
colored display of tensorial quantities such as principal stresses and
- new colored display of vector quantities of forces and
- improvements in the visualization and definition of
moment, normal and shear force diagrams and 1D evolution graphs of beam and
- plus many other minor improvements and
new features and improvements:
The latest version of Microplane M7
model from Prof. Zdenek Bazant and Prof. Ferhun Caner has been implemented to
improve the behavior of M7 material model for the modeling of brittle materials
such as concrete, rock or masonry.
Improvements in the tensile fatigue model
that enables to consider the fatigue damage in concrete material in high cycle
Tata Consultancy Services Campus Chennai, below ATENA analysis of the RC slab on
top of the campus tower.
Testing Laboratory Service
in the cloud. Our new product, the Virtual Testing Laboratory Service,
just reached a public BETA version. We would like to invite you to try it.
allows you to use our software
ATENA and other tools on cloud based computers. These are created instantly,
with all needed software pre-installed.
can be uploaded/downloaded via this web application. To connect cloud computers
created via VTLS you will need some RDP
client software. Computers can be operated from any operating systems
including mobile platforms iOS and Android.
FE analysis for concrete hinges
FE analysis for concrete hinges
Hinges (Fig.1) are used in Bridge columns and in Tunnel linings. In the last
years concrete hinges gained an increasing interest in monolithic construction,
because they are economic, durable and ecological. Current design standards for
concrete hinges are based on the guidelines of Leonhardt and Reimann. Nowadays
design standards require a semiprobabilistic safety-concept for the
Service-Limit-States as well as for the Ultimate-Limit-States. Leonhardt’s
guidelines focus more on the Service-Limit-States, and therefore TU-Wien tested
several concrete hinges up to their bearing capacity to derive new, substantive
design standards. The Institute for Mechanics of Materials and Structures used
an external micro-mechanical approach developed by Hlobil et al. for editing the
input parameters. ATENA Science is used to model concrete under
high triaxial compression [Kalliauer2018ActaMechanica] using the
Menétrey-William-failure-surface, which was later improved by Červenka.
Experiments at TU-Wien.
Stresses all three directions (left: loading direction, middle: horizontal
direction, right: thickness direction).
stress ratio of approximately 1:0.5:0.3 (Fig. 2) occurs on the compressive side
of the hinge [Kalliauer2018ActaMechanica], leading to a compressive strength of
two times the uniaxial compressive strength [Kalliauer2018ActaMechanica]. Also
this triaxial stress path leads to a glancing intersection with the
failure-meridian [Kalliauer2018ActaMechanica], ATENA Studio can
predict the bearing capacity within the experimental scattering without any
Master thesis of Kalliauer includes a more detailed analysis, such as (a)
parameter identification (Fig.3), including the influence on stresses and
strains as well as on the bearing capacity, (b) convergence studies, including
mesh dependency, (c) influence on different material models, (d) stress
distributions in the cross section, (e) dependency of front-side-notches and (f)
a statistical sensitivity Analyses carried out in SARA Studio
Institute for Mechanics of Materials and Structures want to thank the ATENA
hotline support for having answered all the questions.
Dependence of the fracture Energy an the plastic strains (left: low fracture
energy; right: high fracture energy).
Stochastic Analysis in Sara Studio for the bearing capacity.
KALLIAUER, J., SCHLAPPAL, T., VILL, M., MANG, H. & PICHLER, B.: Bearing
capacity of concrete hinges subjected to eccentric compression: multiscale
structural analysis of experiments; Acta Mechanica, Springer Nature, 2018;
pp.849-866, DOI: 10.1007/s00707-017-2004-3
KALLIAUER, J., SCHLAPPAL, T., MANG, H. A. & PICHLER, B. (Ed.: MESCHKE, G.,
PICHLER, B. & ROTS, J. G.): Parameter identification as the basis for Finite
Element simulations of Ultimate Limit States of concrete hinges; Proceedings
Euro-C 2018 conference, ISBN
978-1-138-74117-1, Feb. 2018, pp. 689
Advanced User Seminar 2019
users of ATENA software,
would like to invite you to our ATENA Advanced User Seminar
2019. The seminar will take place in Prague, the Czech Republic
on February 20-22 in Czech language and June 12-14, 2019 in English
In 2016 the content of the seminar was rearranged
compared to the previous years. We decided to concentrate on fewer topics, but
provide deeper coverage and more hands-on experience with particular problems.
Based on the feedback from our hotline support, we selected several topics,
where we expect that ATENA users could benefit most from more indepth
explanation or background information:
- Overview of new ATENA version 5.6.
- Modeling contact problems in ATENA.
- Modeling strengthening of reinforced concrete structures.
- Modeling of construction process in ATENA for bridges and tunnels.
- Modeling of fiber-reinforced concrete structures.
You Can Meet Us
fib Congress 2018
ACI Fall 2018
Las Vegas, USA
Concrete Days 2018
Al-Saoudi, A., Al-Mahaidi, R.,
Kalfat, R., Cervenka, J.: Finite Element
Investigation of the Fatigue Performance of FRP Laminates Bonded to Concrete,
Composite Structures, Volume 208, 15 January 2019, Pages 322-337, https://doi.org/10.1016/j.compstruct.2018.10.001
J., CERVENKA, V., LASERNA. S.: On Crack Band Model in Finite Element Analysis of
Concrete Fracture in Engineering Practice, Engineering Fracture Mechanics,
Volume 197, 2018, Pages 27-47, ISSN 0013-7944.
J., CERVENKA, V., SYKORA, M., MLCOCH, J.: Evaluation of Safety Formats for
Structural Assessment Based on Nonlinear Analysis, Proceedings Euro-C 2018
conference, ISBN 978-1-138-74117-1, Feb. 2018, pp. 669-678
V., CERVENKA, J, KADLEC, L.: Model Uncertainties in Numerical Simulations of
Reinforced Concrete Structures - Structural Concrete Journal fib, Journal of
International Federation for Structural Concrete. DOI: 10.1002/suco.201700287,
D., CERVENKA, V., GRACA-E-COSTA, R.: Model Uncertainty in Discrete and Smeared
Crack Prediction in RC Beams under Flexural Loads. Engineering Fracture
Mechanics. 199 (2018) 532-543
K., SMILAUER, K., JENDELE, L., CERVENKA, J.: Prediction of Reinforcement
Corrosion due to Chloride Ingress and its Effects on Serviceability, Engineering
Structures 174 (2018), pp. 768-777
P., SUSANTI, E., VALEK, M., NOVAK, D., PUKL, R.: Bearing Capacity of Masonry
Walls in Churches - Numerical Investigation, 11th International Conference on
Structural Analysis of Historical Constructions "An interdisciplinary approach",
Cusco, Peru, September 2018
R., CERVENKA, V.: Uncertainty Aspects in Fracture-Mechanical Analysis of
Concrete Structures, 16th International Probabilistic Workshop (IPW2018),
Vienna, Austria, September 2018
R., CERVENKA, V., NOVAK, D.: Shear Failure of Very Large Concrete Beam:
Modelling using Random Fields, CSM8 - 8th Conference on Computational Stochastic
Mechanics, Paros, Greece, June 2018
R., LEHKY, D., NOVAK, D.: Towards Nonlinear Reliability Assessment of Concrete
Transport Structures, IABSE Conference "Engineering the Developing World", Kuala
Lumpur, Malaysia, April 2018
R., SAJDLOVA, T., CERVENKA, J.: Design of SFRC Precast Tunnel Segments Supported
by NLFEA, 3rd FRC ACI-fib-RILEM Joint International Workshop "Fibre Reinforced
Concrete: from Design to Structural Applications", Desenzano, Italy, June