Subproject D2

Numerical simulation of the loadbearing behaviour of textile strengthened conctructions

Leadership Staff Aims Methods  Results publications  diplom thesises

Leadership

Prof. Dr.-Ing. habil. Bernd Möller; leading
Chair of Statics
Institute of Statics and Dynamics of Structures

Prof. Dr.-Ing. Wolfgang Graf
Chair of Statics
Institute of Statics and Dynamics of Structures

Staff

Dr.-Ing. Andreas Hoffmann
Dipl.-Ing. Frank Steinigen

Aims

The strengthening of reinforced concrete with textile surface structures can only be realised reliably if the theoretical basics are known and if the structural behaviour under the modified conditions can be numerically simulated in each individual case. In order to increase the load-bearing capacity, new textile strengthenings developed in this SFB are used.

The numerical simulation is intended to provide both prognoses concerning global system failure and predictions of local phenomena such as shear failure or delamination.

A numerical model has been developed for analysing and assessing the state of deformation and stress of textile strengthened reinforced concrete structures. This numerical model is based on layered hybrid elements with assumed stress distribution, which are successfully applied to the physically nonlinear analysis of reinforced concrete. By introducing an arbitrary number of discretely coupled parallel reference planes the classical layer model has been enhanced so that distortions vertical to the reference planes and shear strains between the layers can be considered discretely.

To account for the local phenomena shear failure und delamination in the interface between concrete and textile strengthening the relative displacements between corresponding points on both sides of this interface are determined. This discrete modification of the displacement field vertical and parallel to the interface combined with a phenomenological dependency between stresses and relative displacements for describing shear and delamination behaviour allows for a consideration of local phenomena in the interface.

For modelling the strengthening layer consisting of a textile mat structure embedded in a matrix of fine concrete both a smeared and a component orientated constitutive material description are introduced.

Fig. 1: Beam under cyclic loading - stress and crack state.



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Methods

In view of the physically nonlinear numerical analysis of textile strengthened reinforced concrete structures with the aid of layered hybrid elements with assumed stress distribution the classical layer model has been enhanced by introducing an arbitrary number of discretely coupled reference planes so that distortions vertical to the reference planes and shear strains in interfaces between the layers can now be considered.

Fig. 2: Multi-reference-plane model.


Results

The load-bearing behaviour of four textile strengthened reinforced concrete structures was simulated with the developed algorithms. The first two examples were used for verifying the numerical model. They are recalculations of tests carried out in the project parts C1 and D1. The load-bearing behaviour of real constructions – a slab-and-beam floor and a folded plate structure – was investigated in the examples three and four. The physically nonlinear behaviour of reinforced concrete was taken into account.

Fig. 3: Folded plate structure - stress and crack state.



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Publications

2010

  • Steinigen, F.; Graf, W.; Kaliske, M.: Numerical modelling of textile strengthened RC structures including a smeared crack approach. In: Mechtcherine, V.; Kaliske, M. (eds.): Fracture and Damage of Advenced Fibre-reinforced Cement-based Materials, Aedificatio Publishers, Freiburg, 2010, pp. 223-230
  • Steinigen, F.; Graf, W.; Kaliske, M.: Compact RC structures with textile strengthening: Computational models and application. In: Zingoni, A. (ed.): Advances and Trends in Structural Engineering, Mechanics and Computation, Taylor & Francis Group, London, 2010, pp. 289-292
  • Graf, W.; Sickert, J.-U.; Steinigen, F.; Kaliske, M.: Numerical simulation of RC structures under impact loads - Ideas, models and examples to the consideration of uncertain data. In: Sas, P.; Bergen, B. (eds.): Proceedings of ISMA2010 International Conference on Noise and Vibration Engineering including Uncertainty in Structural Dynamics (USD2010), Katholieke Universiteit Leuven, 2010, pp. 5027-5042
  • Freitag, S.; Steinigen, F.; Graf, W.; Kaliske, M.: Numerical Long-Term Simulation of TRC Strengthened RC Structures. In: Brameshuber, W. (ed.): Proceedings of the International RILEM Conference on Material Science (MatSci) - Volume I, 2nd International Conference of Textile Reinforced Concrete (ICTRC), Aachen, RILEM Publications S.A.R.L., Bagneux, 2010, pp. 319-329
  • Sickert, J.-U.; Steinigen, F.; Graf, W.; Kaliske, M.: Numerische Simulation textilbetonverstärkter Plattenstrukturen. In: Anwendertagung Leichter bauen - Zukunft formen, Dresden, 2010, TUDALIT-Magazin S.14, Volltext (21 S.) CD-DOM
  • Graf, W.; Freitag, S.; Sickert, J.-U.: Uncertain structural processes and neural network application. In: 4th European Conference on Computational Mechanics (ECCM 2010), Paris, 2010. – CD-ROM
  • Graf, W.; Kaliske, M.; Sickert, J.-U.; Pannier, S.: Konzepte zur Beurteilung der Robustheit von Tragwerken. 14. Dresdner Baustatik-Seminar, TU Dresden, Institut für Statik und Dynamik der Tragwerke, 2010, S. 69-91

2009

  • Steinigen, F.; Graf, W.; Hoffmann, A.; Kaliske, M.: Rehabilitation of existing spatial RC structures with textile strengthening. In: Kuczma, M. (Hrsg.); Wilmanski, K. (Hrsg.); Szajna, W. (Hrsg.): Proceedings of the 18th International Conference on Computer Methods in Mechanics – CMM2009, Zielona Góra, 18.–21.5.2009. Zielona Góra : The University of Zielona Góra Press, 2009, pp. 443-444
  • Steinigen, F.; Graf, W.; Hoffmann, A.; Kaliske, M.: Nachträglich textilverstärkte Stahlbetontragwerke - Strukturanalyse mit unscharfen Daten. In: Curbach, M. (Hrsg.), Jesse, F. (Hrsg.): Textile Reinforced Structures : Proceedings of the 4th Colloquium on Textile Reinforced Structures (CTRS4) und zur 1. Anwendertagung, Dresden, 3.-5.6.2009. SFB 528, Technische Universität Dresden, D–01062 Dresden : Eigenverlag, 2009, S. 301-312 URN: urn:nbn:de:bsz:14-ds-1244047124333-78222
  • Graf, W.; Sickert, J.-U.; Steinigen, F.: Numerical simulation of structures using generalized models for data uncertainty. In: Brebbia, C.A.; Carlomagno, G.M. (eds.): Computational Methods and Experimental Measurements XIV Southampton : WIT Press, 2009, pp. 511-521
  • Sickert, J.-U.; Graf, W.; Steinigen F.: Structural dynamics under consideration of imprecise probability. In: Papadrakakis, M.; Lagaros, N.D.; Fragiadakis M. (eds.): ECCOMAS Thematic Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COMPDYN2009), Rhodos, 2009. p. 186, Volltext (11 S.), CD-ROM
  • Graf, W.; Kaliske, M.; Hoffmann, A.; Sickert, J.-U.; Steinigen, F.: Computational models for textile reinforced concrete structures. In: Ghafoori, N. (ed.): 5th International Structural Engineering and Construction Conference (ISEC-05), Las Vegas, 2009. London : Taylor & Francis/Balkema, pp. 589-594
  • Möller, B.; Graf, W.; Sickert, J.-U.; Steinigen, F.: Fuzzy random processes and their application to dynamic analysis of structures. Mathematical and Computer Modelling of Dynamical Systems (MCMDS) 15 (2009) 6, pp. 515-534 – doi: 10.1080/13873950903375338
  • Graf, W.; Jenkel, C.; Pannier, S.; Sickert, J.-U.; Steinigen, F.: Numerical structural monitoring with the uncertainty model fuzzy randomness. International Journal of Reliability and Safety 3 (2009) 1/2/3, pp. 218-234
  • Geißler, G.:The Cohesive Crack Tip Model within the Finite Element Method - Implementations, Enhancements, Applications. Dissertation, Dresden: Fakultät Bauingenieurwesen, Technische Universität Dresden, 2009.

2008

  • Chudoba, R.; Möller, B.; Meskouris, K.; Zastrau, B.; Graf, W.; Lepenies, I.: Numerical Modeling of Textile Reinforced Concrete. In: Dubey, A. (edt.): Textile-Reinforced Concrete. Proceedings of ACI Fall Convention. Kansas City, November 2005. SP-250CD—11, 2008 – CD-Rom
  • Graf, W.; Hoffmann, A.; Kaliske, M.; Möller, B.: Die Statik bleibt dynamisch. In: 12. Dresdner Baustatik-Seminar. TU Dresden, Institut für Statik und Dynamik der Tragwerke, 2008, S. 67-86
  • Sickert, J.-U.; Kaliske, M.; Graf, W.: Fuzzy stochastic earthquake analysis of structures. In: COST C26: Urban Habitat Constructions under Catastrophic Events. Datasheet, International Symposium, University of Malta, 2008
  • Sickert, J.-U.; Kaliske, M.; Graf, W.: Strengthening of earthquake damaged structures by means of textile reinforced structures. In: COST C26: Urban Habitat Constructions under Catastrophic Events. Datasheet, International Symposium, University of Malta, 2008
  • Steinigen, F.; Graf, W.; Kaliske, M.; Sickert, J.-U.: Numerical monitoring of textile reinforced concrete structures. In: Topping, B.H.V.; Papadrakakis, M. (eds.): 9th Internat. Conference on Computational Structures Technology, Athens, 2008. Proceedings, Civil-Comp Press : Stirlingshire, 2008, p. 183, Volltext (12 S.), CD-ROM
  • Kaliske, M.; Graf, W.: Numerisches Tragwerksmonitoring und Prognose des Tragwerkverhaltens. In: Wagner, W. (Hrsg.): Baustatik-Baupraxis 10. Bericht, Universität Karlsruhe (TH), 2008, S. 183-192

2007

  • Curbach, M.; Graf, W.; Jesse, D.; Sickert, J.-U.; Weiland, S.: Segmentbrücke aus textilbewehrtem Beton - Konstruktion, Fertigung, numerische Berechnung. In: Beton- und Stahlbetonbau 102 (2007) 6, S. 342-352 – doi:10.1002/best.200700550
  • Graf, W.; Hoffmann, A.; Möller, B.; Sickert, J.-U.; Steinigen, F.: Analysis of textile reinforced concrete structures under consideration of non-traditional uncertainty models. Engineering Structures 29 (2007) 12, pp. 3420-3431

2006

  • Steinigen, F.; Möller, B.; Graf, W.; Hoffmann, A.: Numerical simulation of textile reinforced concrete considering dynamic loading process. In: Hegger, J.; Brameshuber, W.; Will, N. (eds.): Textile Reinforced Concrete – Proceedings of the 1st International RILEM Conference, Aachen, 2006. RILEM, pp. 275-284
  • Steinigen, F.: Numerische Simulation des Tragverhaltens textilverstärkter Bauwerke. Dissertation, Veröffentlichungen Institut für Statik und Dynamik der Tragwerke, Heft 11, TU Dresden, 2006
  • Möller, B.; Graf, W.; Hoffmann, A.; Sickert, J.-U.; Steinigen, F.: Textile reinforced concrete structures under uncertain dynamic loading processes. In: Mota Soares, C. M. et al. (eds.): 3th European Conference on Computational Mechanics (ECCM), Lisboa, 2006. Book of Abstracts, Springer, Dordrecht, p. 750, CD-ROM
  • Möller, B.; Graf, W.; Hoffmann, A.; Sickert, J.-U. Simulation of load-bearing capacity of structures by fuzzy random processes In: Topping, B.H.V. (ed.): 8th Internat. Conference on Computational Structures Technology, Gran Canaria, 2006. Proceedings, Civil-Comp Press, Stirlingshire, 2006, pp. 421-422, Volltext CD-ROM
  • Freitag, S.; Graf, W.; Hoffmann, A.; Pannier, S.; Sickert, J.-U.; Steinigen, F.: Tragwerke aus Textilbeton – unscharfe numerische Simulation. In: Ruge, P.; Graf, W. (eds.): 10. Dresdner Baustatik-Seminar. Dresden, 2006, S. 123-132 – PDF-Datei, 544 kB

2005

  • Möller, B.; Graf, W.; Hoffmann, A.; Steinigen, F.: Numerical simulation of structures with textile reinforcement. Computers and Structures 83 (2005) 19-20, p. 1659-1688 – doi: 10.1016/j.compstruc.2004.11.024
  • Steinigen, F.; Möller, B.; Graf, W.; Hoffmann, A.: Textile reinforced RD folded plate structures considering cyclic loading and damage. In: Hofstetter, G.; Meschke, G.: Numerical Modelling of Concrete Cracking, EUROMECH Colloquium 460, Innsbruck, 2005. CD-ROM
  • Möller, B.; Graf, W.: Tragwerksprozesse in der Baustatik. In: Möller, B: Baustatik-Baupraxis 9, TU Dresden, 2005, S. 381-393
  • Graf, W.; Möller, B.; Hoffmann, A.; Steinigen, F.; Bartzsch, M.: Numerical models concerning RC structures with textile strengthening. In: Hara, T. (ed.): 3th Intern. Structural Engineering and Construction Conference, ISEC-03 Tokuyama College of Technology, Shunan, 2005. Taylor & Francis / Balkema, London, Rotterdam, pp. 175-183
  • Möller, B.; Graf, W.; Hoffmann, A.; Sickert, J.-U.; Steinigen, F.: Rehabilitation of existing spatial RC structures with the aid of textile strengthening. In: Ramm, E.; Wall, W. A.; Bletzinger, K.-U.; Bischoff, M.: 5th International Conference on Computation of Shell & Spatial Structures, Salzburg, 2005. Book of Abstracts, p. 240, paper (4 pp.), CD-ROM
  • Möller, B.; Graf, W.; Hoffmann, A.; Sickert, J.-U.; Steinigen, F.: Tragwerke aus Textilbeton – Berechnungsmodelle, Anwendungen. In: Bautechnik 82 (2005) 11, S. 782-795 – doi:10.1002/bate.200590231

2004

  • Möller, B.; Brückner, A.; Ortlepp, R.; Steinigen, F.: Verstärken mit textilbewehrtem Beton - Experimente und numerische Simulation. In: Beton- und Stahlbetonbau 99 (2004) 6, S. 466-471 – doi:10.1002/best.200490118
  • Chudoba, R.; Graf, W.; Meskouris, K.; Zastrau, B.: Numerische Modellierung von textilverstärktem Beton. Beton- und Stahlbetonbau 99 (2004) 6, S. 460-465 – doi:10.1002/best.200490117
  • Möller, B.; Graf, W.; Hoffmann, A.; Steinigen, F.: Numerical models concerning structures with multi-layered textile strengthening. In: Topping, B. H. V. (ed.), 7th Int. Conference on Computational Structures Technology, Lisboa, 2004, Proceedings, Civil-Comp Press, Stirling, Abstract, pp. 97-98, Volltext (21 S.), CD-ROM
  • Graf, W.; Möller, B.; Hoffmann, A.; Steinigen, F.: RC-Structures with multi-directional, multi-layered textile strengthening. ECCOMAS 2004, University of Jyväskylä, 2004, Book of Abstracts, Vol. II, p. 80, Volltext (17 S.), CD-ROM
  • Möller, B.; Graf, W.; Hoffmann, A.; Sickert, J.-U.; Liebscher, M.: Numerische Simulation des Sprengabbruches von Tragwerken. In: 8. Dresdner Baustatik-Seminar. TU Dresden, Lehrstuhl für Statik, 2004, Bericht, S. 41-68
  • Bartzsch, M.; Graf, W.; Möller, B.; Sickert, J.-U.: Modification of structures with uncertain parameters. In: Neittaamäki, P. (ed.) ECCOMAS 2004. University of Jyväskylä, 2004, Book of Abstracts, Vol. II, p. 82, paper (17 S.), CD-ROM
  • Bartzsch, M.; Graf, W.; Möller, B.: Modification of Composite Structures using Fuzzy Processes. In: Iyengar, NGR.; Kumar, A. (eds.): ICCMS-04. IIT Kanpur, 2004, Proceedings, pp. 636-645

2003

  • Graf, W.; Möller, B.; Hoffmann, A; Steinigen, F.: Models and experiments concerning structures with multi-directional, multi-layered textile strengthening. In: Anagnostopoulos, P.; Carlomagno, G.M.; Brebbia, C.A. (Eds.): Computational Methods and Experimental Measurements XI. Halkidiki 2003, WIT Press, Southampton, Boston, pp. 611-620
  • Möller, B.; Steinigen, F.; Graf, W.; Hoffmann, A.: Berücksichtigung von zyklischer Belastung und Schädigung bei der numerischen Simulation von Textilbeton. In: Curbach, M. (Ed.): Textile Reinforced Structures. Proceedings of the 2nd Colloqium on Textile Reinforforced Structures (CTRS2), Dresden, Germany, 29.9.2003-1.10.2003. Dresden: Sonderforschungsbereich 528, Technische Universität Dresden, 2003, pp. 423-434
  • Steinigen, F.; Möller, B.; Graf, W.; Hoffmann, A.: RC structures with textile reinforcement and strengthening. In: Bicanic, N.; de Borst, R.; Mang, H.; Meschke, G. (Eds.): Computational Modeling of Concrete Structures. Proceedings of the Euro-C Conference 2003, St. Johann im Pongau, A. A. Balkema, Lisse, pp. 759-768
  • Sickert, J.-U.; Graf, W.; Hoffmann, A.; Möller, B.; Steinigen, F.: Uncertain safety: textile strengthened reinforced concrete constructions. In: Techtextil-Symposium 2003, Frankfurt/M., CD-ROM

2002

  • Graf, W.; Möller, B; Hoffmann, A.; Steinigen, F.: Numerical simulation of RC structures with textile reinforcement. In: Mang, A. H.; Rammerstorfer, F. G.; Eberhardsteiner, J. (eds.): Fifth World Congress on Computational Mechanics. Vienna, 2002, 10 pp., http://wccm.tuwien.ac.at
  • Möller, B.; Graf, W.; Hoffmann, A.; Steinigen, F.: Nachträgliche Verstärkung von Stahlbeton-Konstruktionen mit textilen Bewehrungen. In: Baustatik – Baupraxis 8. TU Braunschweig, 2002, S. 161–173

2001

  • Graf, W.; Hoffmann, A.; Möller, B.; Steinigen, F.: Numerical simulation and experimental measurements of RC-structures with textile  reinforcements. In: Brebbia, C. A.; Carlomagno, G. M.; Villacampa, Y. (Eds.): Computational Methods and Experimental Measurements X. Alicante 2001, WIT Press, Southampton, Boston, pp. 387-396
  • Möller, B.; Graf, W.; Hoffmann, A.; Steinigen, F.: Numerische Simulation des Tragverhaltens textilverstärkter Bauwerke. In: 1. Fachkolloquium Textilbeton. RWTH Aachen, 2001, S. 233-244 (PDF-Datei, 1182 kB)
  • Vassilev, T.: Bewertung von Modellen zur numerischen Simulation textilverstärkter Stahlbeton-Konstruktionen. Veröffentlichungen des Lehrstuhls für Statik. H. 3 (2001), TU Dresden
  • Graf, W. et al.: Aspekte der Theorie und Berechnung von Tragwerken. In: Festschrift Prof. Dr.-Ing. Bernd Möller 60 Jahre. TU Dresden, Lehrstuhl für Statik, 2001, S. 359–381

2000

  • Möller, B.; Graf, W.; Hoffmann, A.; Steinigen, F.: Textile Bewehrungen für leichte Beton-Konstruktionen. In: 4. Dresdner Baustatik-Seminar. Technische Universität Dresden, Lehrstuhl für Statik, 2000, Bericht, S. 47–66
  • Möller, B.; Beer, M.; Graf, W.; Hoffmann, A.: RC-folded plate structures with textile reinforcement. In: Onate, E. (Ed.): ECCOMAS Barcelona. 2000, CD-Rom
  • Möller, B.; Graf, W.; Hoffmann, A.; Steinigen, F.: Long term damage processes in RC-folded plate structures with textile reinforcement. In: Selvadurai, A. P. S.; Brebbia, C. A. (Eds.): Damage and Fracture Mechanics VI. Montreal, WIT Press, Southampton, Boston, 2000, pp. 119-128
  • Möller, B.; Graf, W.; Hoffmann, A.; Steinigen, F.: Long term damage processes in RC-folded plate structures with textile reinforcement. In: Selvadurai, A.P.S.; Brebbia, C.A. (Eds.): Damage and Fracture Mechanics VI.  Montreal, WIT Press, Southampton, Boston, 2000, pp. 119–128

1999

  • Möller, B.; Graf, W.; Hoffmann, A.; Beer, M.: Ultimate limit load of RC-folded plate structures with textile reineforcements. In: Carlomagno, G.M.; Brebbia, C.A. (Eds.): Computational Methods and Experimental Measurements IX. Sorrento 1999, WIT Press, Southampton, Boston, 1999, pp. 453–462
  • Möller, B.; Graf, W.; Hoffmann, A.; Kluger, J.: Judgment of damage in RC-folded plate structures using a global dynamical damage indicator. In: Fryba, L.; Naprestek, J. (Eds.): EURODYN, Prag 1999. A. A. Balkema Publ., Rotterdam, 1999, pp. 599-604

1998

  • Möller, B.; Beer, M.; Graf, W.; Hoffmann, A.: FE-Modellierung von Composite-Konstruktionen aus Stahlbeton und textilen Verstärkungen. In: Finite Elemente in der Baupraxis. TU Darmstadt, Berlin : Ernst u. Sohn, 1998, S. 151-160

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Diplomarbeiten

  • Christiane Morgner – "Erweiterung des Multi-Referenzebenen-Modells um ein
    nichtlineares räumliches finites Stabelement"
  • Frank Steinigen – "Aufbau der WindowsNT-Version von FALT-FEM"
  • André Zillmann – "Entwurf einer Windows-Benutzeroberfläche für Statiksoftware"
  • Mike Thieme – "Simulation textilverstärkter Stahlbetonkonstruktionen"

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