NEWSLETTER 2/2012 - OCTOBER
Program AmQuake was developed in cooperation between Cervenka Consulting and Wienerberger AG, Vienna. It allows engineers to design safe masonry buildings in seismic regions in accordance with the latest European standards. For more information see www.amquake.eu.
New version of AmQuake
- unified and powerful environment for all analysis types: 2D, 3D, statics, dynamics, creep, heat & moisture transport
Before the ATENA Studio
will be released officialy, users with valid maintenance can download the new version 4.3.1g from our website
Intuitive design of ATENA Studio
Simulation of Shrinkage Cracking of a Reinforced Concrete Slab
In practice, engineers often need to design a reinforced concrete foundation slab, when the main design criterion is the crack width limit at the bottom or top surface. ATENA version 5 now includes a comprehensive transport and shrinkage model that provide the necessary answers to engineers. It is possible to calculate the hydration heat, which develops in the structure based on the concrete composition and cement type. More accurate estimation of the shrinkage is possible by coupling the stress analysis with the transport model, which predicts the time dependent drying of the material through its thickness.
Fig. 1: Geometry of the reinforced concrete slab
Fig. 2: Cracking pattern and shrinkage evolution after 100 years
Fig. 3: Evolution of shrinkage in 100 years
Fig. 4: Temperature evolution in 50 days
NEWSLETTER 2/2012 - OCTOBER3/6
Identification of Material Parameters for Nonlinear Modelling of Fibre Reinforced Concrete Structures
ATENA Software can be successfully used for analysis of behaviour and failure of fibre reinforced concrete (FRC) structures. Crack initiation and development, load carrying capacity and post-critical behaviour of structures, structural parts or experimental specimens can be investigated.
Nonlinear fracture analysis accounting tensile capacity of material enables to exploit reserves, which are usually neglected or diminished in codes or in the linear analysis. Since the tensile behaviour in the FRC is dominating, the potential profit from the nonlinear analysis of FRC-based structures is much higher than in standard reinforced concrete structures.
Constitutive material models in ATENA were adopted for description of tensile properties of the FRC-material. They account for the high toughness and ductility of FRC as well as possible uncertainties and spatial variability of the material properties. Inverse analysis of different types of FRC material tests has been performed and evaluated. Based on the obtained results the optimal material input sets for practical utilization of the different numerical material models of FRC were suggested and applied in design practise.
Fig. 5: Comparison of numerically obtained crack patterns at peak load for conventionally reinforced concrete tunnel tubing (left) and fibre reinforced concrete tunnel tubing (right). In the FRC structure, the maximum crack width is significantly reduced.
NEWSLETTER 2/2012 - OCTOBER4/6
Arch Bridge 3D Model in ATENA
As you can see in the header of this newsletter, we had a nice work modelling the new slender arch bridge, which is under construction.
In this part, we would like to show you more pictures from our analysis of this amazing structure.
ATENA software was used to verify the reinforcement and crack width in the end regions of this slender arch bridge.
Fig. 1: Arch bridge geometry
Fig. 2: Numerical model of 1/4 of the bridge
Fig. 3: Numerical model of the bridge end regions with longitudinal pre-stressing tendons
Fig. 4: Maximal extend of micro-cracking, max. crack width less than 0.13 mm
Fig. 5: Maximal stress in longitudinal normal reinforcement cca 90 MPa
NEWSLETTER 2/2012 - OCTOBER5/6
Eurostars/Eureka Project SE-Lab
Cervenka Consulting has teamed up with the University of Dresden and Leonhardt, Andrä und Partner to develop an innovative virtual laboratory for modern stochastic and non-linear structural analysis methods based on massive simulation with CAD design integration through BIM and the access of public cloud and private grid for mass computing. This development will be supported by the financial funding from the European Eurostars/Eureka program.
SE-Lab is an innovative combination
(1) of sophisticated mathematical methods from computational mechanical and probabilistic engineering
(2) of computer science methods from public cloud and private grid and web-service technologies, and
(3) of construction informatics methods, from Building Information Modelling (BIM), in particular engineering information management, filtering, interoperability, model mapping and model change propagation.
CERVENKA, J., Modelling of Shear Failure of Deep Concrete Beams - Discrete and Smeared Approach Comparison, Proc. WCCM 2012, Sao Paulo, Brazil, 08. - 13. 07. 2012, ISBN 978-85-86686-69-6, pp. 297
CERVENKA, J., PROSKE, D., KURMANN, D., CERVENKA, V., Pushover Analysis of Nuclear Power Plant Structures, Proc. fib 2012, Stockholm, Sweden, 11. - 14. 06. 2012, ISBN 978-91-980098-1-1, pp. 245 - 248
CERVENKA, J., CERVENKA, V., JANDA, Z., Posouzení bezpečnosti obálek jaderných reaktorů s využitím celkového součinitele bezpečnosti, Energetika 5/2012, ISSN 0375-8842, pp. 250 - 253
HILAR, M., VITEK, J., PUKL, R., Laboratory Testing and Numerical Modelling of SFRC Tunnel, Proc. EETC 2012, Budapest, Hungary, 18. - 21. 09. 2012
JANDA, Z., CERVENKA, J., Posuzování zděných staveb dle Eurokódu 8 na seizmicitu metodou postupného přitěžování, Hradec Králové, Czech Republic, 6/2012, ISSN 1211-6017, pp. 19 - 23
JENDELE, L., ŠMILAUER, V., HLOBIL, M., ČERVENKA, J., Multiscale Hydro-thermo-mechanical Analysis of Hydrating Concrete Structures, Proc. CST 2012, Dubrovnik, Croatia, 04. - 07. 09. 2012
NOVÁK, D., FEKETE, L., PUKL, R., Statistical Analysis of Crack Widths by Virtual Modelling of Reinforced Concrete Beams, Proc. SSCS 2012, Aix-en-Provence, France, 29. 05. - 01. 06. 2012, pp. 75 - 76
NOVÁK, D., PUKL, R., Reliable/reliability Computing for Concrete Structures: Metodology and Software Tools, Proc. REC 2012, Brno, Czech Republic, 13. - 15. 06. 2012, ISBN 978-80-214-4507-9, pp. 427 - 437
NOVÁK, D., PUKL, R., Simulation of Random Behavior of Engineering Structures: From Parameters Identification to Reliability Assessment, Proc. IALCCE 2012, 03. - 06. 10. 2012, Vienna, Austria, ISBN 978-0-415-62126-7, pp. 446
NOVÁK, D., TEPLY, B., PUKL, R., STRAUSS, A., Reliability Assessment of Concrete Bridges, Proc. IABMAS 2012, Stresa, Italy, 08. - 12. 07. 2012, ISBN 978-0-41562124-3, pp. 160
PRYL, D., PUKL, R., ČERVENKA, J., Modeling High-Cycle Fatigue of Concrete Specimens in Three Point Bending, Proc. IALCCE 2012, Vienna, Austria, ISBN 978-0-415-62126-7, pp. 278
PUKL, R., CERVENKA, V., CERVENKA, J., NOVÁK, D., Computer Simulations of Concrete Bridges, Proc. IABMAS 2012, Stresa, Italy, 08. - 12. 07. 2012, ISBN 978-0-41562124-3, pp. 684
NEWSLETTER 2/2012 - OCTOBER6/6
Where You Can Meet Us
Upcoming Events, Exhibitions and Presentations
IALCCE October 03-06, 2012 Austria, Vienna
CCC October 04-06, 2012 Croatia, Plitvice
Probabilistic November 15-16, 2012 Germany, Stuttgart
Slovak Concrete days October 25-26, 2012 Slovak Republic, Bratislava
Czech Concrete days November 21-22, 2012 Czech Republic, Hradec Kralove
BetonTage Ferbuary 07-09, 2013 Germany, Ulm
Framcos March 10-14, 2013 Spain, Toledo
fib April 22-24, 2013 Israel, Tel Aviv
IABSE May 06-08, 2013 Netherlands, Rotterdam
SCCS May 27-29, 2013 Japan, Tokyo
ICOSSAR June 16-20, 2013 United States, New York
SCMT August 19-21, 2013 Japan, Tokyo
CONSEC September 23-25, 2013 China, Nanjing
UHPRFC September 30- October 2, 2013 France, Marseille