Subproject E3

Safety assessment of textile strengthened structures

Director  Staff  Goals  Methods  Results  Publications  Diplom thesises

Director

4th Founding periode

Dr.-Ing. Jan-Uwe Sickert
Institute for Structural Analysis

1st - 3rd Founding period

Prof. Dr.-Ing. habil. Bernd Möller; leading
Prof. Dr.-Ing. Wolfgang Graf
Institute for Structural Analysis

Staff

Prof. Dr.-Ing. Wolfgang Graf (advisory)
Prof. Dr.-Ing. habil. Michael Kaliske (advisory)
Prof. Dr.-Ing. habil. Bernd Möller (advisory)
Dipl.-Ing. Christian Jenkel

Goals

[Removed image: http://rcswww.urz.tu-dresden.de/%7Estatik/sfb/download/e3_b2.gif Alternative text: Image caption: ]

Fig. 1: Probability density function
with fuzzy limit state function and
multi modal importance dansity function
ot the FAIS algorithm.

The reliability of structures depends on their lifetime and a multitude of single effects such as material damage, mechanical damage, corrosion, number and quality of maintenance. It is time-dependent. Therefore, the safety assessment of existing structures is always the evaluation of a specific case for which in most cases the number of observations is insufficiently large for a statistical evaluation free of doubt.

The development of models and algorithms to describe the uncertainty concerning the analysis of textile-strengthening structures in a different way started in the 1st working period. The uncertainty was modelled by either fuzziness or fuzzy randomness. It has been found, that fuzzy randomness constitutes an essentially extensive basis compared with fuzziness. Fuzzy randomness includes both randomness and fuzziness as special cases and provides the consideration of different types of uncertainty (randomness, fuzziness and fuzzy randomness) simultaneously.

Therefore, in the 2nd working period the theory to fuzzy randomness is expanded and the safety concept 1 based on it is developed further and extended, e.g with the introduction of fuzzy random functions in order to describe spatial and time dependencies of uncertain fluctuating input variables.

On the basis of the fuzzy probabilistic safety concept, the to safety assessment inverse task will be solved in the 3rd working period, i.e. design of the textil reinforced strengthening. The set of permissible solutions for the safety goal oriented design is evaluated by the aid of the robustness measure. Each single uncertain input parameter is assessed according to structural reserves and sensitivity. This algorithm supports the choice of a deterministic design variant.

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Methods

The basis for the development of the safety concepts are the uncertain data analysis, the fuzzy structural analysis, the fuzzy probabilistic safety assessment, the possibility theory based safety assessment and the compilation of structural damage. The application of the concepts for the safety evaluation of textile-strengthened buildings requires the integration of the computation model of the subproject D2 "Numerical simulation of the load-bearing behaviour of textile strengthened constructions". The material parameters, geometry, and load variables of existing structures and textile-reinforced strengthening layers possess also data uncertainty, which cannot be described by stochastic models satisfyingly. This in particular informal data uncertainty can be better modelled with fuzzy randomness or fuzziness.

Uncertainty models

Uncertain data analysis

  • Uncertain data analysis (PDF-file, 153 kB - in German)

Sructural analysis with uncertain parameters

  • Fuzzy structural analysis (PDF-file, 1020 kB)
  • Fuzzy stochastic structural analysis using the Fuzzy stochastic finite element method (FSFEM) (PDF-file, 770 kB)
  • Uncertainty in damage assessment of structures (PDF-file, 570 kB)

Safety assessment

Time-dependent fuzy random data uncertainty leads to uncertain time variant reliability. The reliablity of textil strengthened structures can computed under consideration of the available data with three different safety concepts.

[Removed image: http://rcswww.urz.tu-dresden.de/%7Estatik/sfb/download/e3_b1.gif Alternative text: Image caption: ]
Fig. 2: Fuzzy probabilistic time-dependent limite state concept.
  • In the safety concept 1 fuzzy probability density functions are introduced to quantify uncertainty. The characteristic parameters of this functions are fuzzy variables with membership functions. Together with fuzzy material, fuzzy geometry and fuzzy load parameters this fuzzy distribution parameters form the space of fuzzy bunch parameters . The fuzziness of the fuzzy bunch parameters is mapped onto new uncertain safety measures (fuzzy failure probability, fuzzy reliability index) by the aid of a new numerical concept. The extension principle is replaced with an optimization problem. The new uncertain safety measures follow from the vague data basis. The "ordinary" probabilistic safety assessment is included in this concept as a special case. The fuzzy failure probability is probabilistically "exactly" determined on using simulation methods. In the 2nd working period the Fuzzy Adaptive Importance Sampling (FAIS) was developed. (PDF-file, 770 kB) The fuzzy reliability index is computed on the level of the first order reliability method (FORM). (PDF-file, 430 kB)
  • In the safety concept 2 the existing failure possibility is computed by the aid of fuzzy analysis and the possibility theory and confronted to the permissible failure possibility. The possibility theory based safety concept was developed to code conform state. (PDF-file, 510 kB)
  • Furthermore, a semi probabilistic safety concept is developed which is conform with current available codes. By aid of this concept certain and uncertain partial safety factors for fuzzy random structural and load parameter could be determined.

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Results

The methods and algorithms specified above are transferred into software, which are used for the solution of the example problems.

Uncertain data analysis

  • Determination of the membership function (fuzziness) - tensile strength of filaments NEG-ARG155-01 (PDF-file, 67 kB - in German)
  • Determination of the membership function (fuzziness) - tensile strength of filament yarn NEG-ARG620-01 (PDF-file, 143 kB - in German)
  • Determination of the fuzzy probability distribution function (fuzzy randomness) - Young's modulus of filament yarn NEG-ARG620-01 (PDF-file, 64 kB - in German)
  • Determination of the fuzzy probability distribution function (fuzzy randomness) - tensile strength of textile reinforced strengthening layers (PDF-file, 99 kB)

Structural analysis with uncertain parameters

  • Computation of the fuzzy random load displacement dependency of the textil strengthened plate which was experimentally investigated in the subproject D1 (PDF-file, 204 kB - in German)
  • Computation of the fuzzy displacement of a textile strengthened folded-plate structure (PDF-file, 124 kB - in German)

Possibility theory based safety assessment

  • Safety assessment of an unstrengthened and a strengthened folded-plate structure for the serviceability limit state (PDF-file, 307 kB - in German)

Fuzzy probabilistic safety assessment

  • Computation of the fuzzy reliability of a T-beam floor construction considering the ultimate limit state (PDF-file, 156 kB)

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Publications

2011

  • Sickert, J.-U.; Graf, W.; Pannier, S.: Numerical design approaches of textile reinforced concrete strengthening under consideration of imprecise probability Structure and Infrastructure Engineering 7 (2011), pp. 163–176 – doi:10.1080/15732471003588700

2010

  • 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
  • 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.; Kaliske, M.; Sickert, J.-U.; Pannier, S.; Freitag, S.: Neural Networks and Imprecise Probability Concepts for the Design of Industry-Sized Structures. In: Khalili, N.; Valliappan, S.; Li, Q.; Russell, A. (Eds.): Proceedings of the 9th World Congress on Computational Mechanics (WCCM), Sydney, 2010, pp. 72-73
  • Sickert, J.-U.; Pannier, S.; Graf, W.; Kaliske, M.: Efficient Numerical Reliability Based Design of TRC Strengthening Layers for Complex 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. 307-318
  • Pannier, S.; Sickert, J.-U.; Graf, W.; Kaliske, M.: Tailored metamodels for fuzzy reliability based optimization task. In: Rodrigues, H. et al. (eds.): Proceedings of the 2nd International Conference on Engineering Optimization (EngOpt), Lisboa, 2010, pp. 264-265, Volltext (10 S.) CD-ROM
  • Graf, W.; Sickert, J.-U.; Pannier, S.; Kaliske, M.: Robust design with uncertain data and response surface approximation. In: Beer, M.; Muhanna, R.L.; Mullen, R.L. (eds.): Proceedings of the 4th International Workshop on Reliable Engineering Computing (REC 2010), Singapore, 2010. Singapore : Research Publishing Services, 2010, pp. 554-574 – doi:10.3850/978-981-08-5118-7_027
  • Graf, W.; Freitag, S.; Kaliske, M.; Sickert, J.-U.: Recurrent Neural Networks for Uncertain Time-Dependent Structural Behavior. Computer-Aided Civil and Infrastructure Engineering 25 (2010) pp. 322-333 – doi:10.1111/j.1467-8667.2009.00645.x
  • 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

  • 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
  • Freitag, S.; Graf, W.; Kaliske, M.; Sickert, J.-U.: Prediction of Structural Behaviour with Recurrent Neural Networks for Fuzzy Data. In: Topping, B.H.V.; Tsompanakis, Y. (eds.): Proceedings of the First International Conference on Soft Computing Technology in Civil, Structural and Environmental Engineering, Funchal, 2009. Stirlingshire : Civil-Comp Press, 2009, Book of Abstracts, paper 28, Volltext (20 S.), CD-ROM – doi:10.4203/ccp.92.28
  • Sickert, J.-U.; Graf, W.; Pannier, S.: Entwurf von Textilbetonverstärkungen - computerorientierte Methoden mit verallgemeinerten Unschärfemodellen. 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. 313-324 URN: urn:nbn:de:bsz:14-ds-1244047293129-54264
  • Piotrov, A.; Liebscher, M.; Pannier, S.; Graf, W.: Grouping detection of uncertain structural processes by means of cluster analysis. In: 7. European LS-DYNA Conference, Salzburg, 2009. Proceedings, S. 128 and CD-ROM (11 S.)
  • Sickert, J.-U.; Pannier, S.; Graf, W.; Jenkel, C.: Robustness assessment of structures incorporating generalized uncertainty models. In: Furuta, H.; Frangopol, D.M.; Shinozuka, M. (eds.): Safety, Reliability and Risk of Structures, Infrastructures and Engineering Systems, Proceedings of the 10th International Conference on Structural Safety and Reliability (ICOSSAR2009). London : Taylor & Francis, p. 111, Volltext (8 S.), CD-ROM
  • Pannier, S.; Sickert, J.-U.; Graf, W.: Patchwork approximation scheme for reliability assessment and optimization. In: Furuta, H.; Frangopol, D.M.; Shinozuka, M. (eds.): Safety, Reliability and Risk of Structures, Infrastructures and Engineering Systems, Proceedings of the 10th International Conference on Structural Safety and Reliability (ICOSSAR2009). London : Taylor & Francis, p. 531, Volltext (8 S.), CD-ROM
  • Möller, B.; Liebscher, M.; Pannier, S.; Graf, W.; Sickert J.-U.: An inverse solution of the lifetime-oriented design problem. In: Structure and Infrastructure Engineering: Maintenance, Management, Life-Cycle Design and Performance (2009), online available – doi:10.1080/15732470802658946
  • Reuter, U.:Modellierung ungewisser Daten des Bauingenieurwesens und Anwendung der Modelle in Statik und Dynamik. Habilitationsschrift, Dresden: Fakultät Bauingenieurwesen, Technische Universität Dresden, 2009.

2008

  • 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
  • Möller, B.; Reuter, U.: Prediction of uncertain structural responses using fuzzy time series. Computers & Structures 86 (2008) 10, pp. 1123-1139 – doi:10.1016/j.compstruc.2007.09.002
  • Möller, B.; Beer, M.: Engineering computation under uncertainty capabilities of non-traditional models. Computers & Structures 86 (2008) 10, pp. 1024-1041 – doi:10.1016/j.compstruc.2007.05.041
  • Graf, W.; Möller, B.; Bartzsch, M.: Uncertain processes and numerical monitoring of structures In: Muhanna, R.; Mullen, R.L. (eds.): Proceedings of 3rd Internat. Workshop Reliable Engineering Computing (REC), Georgia Tec, Savannah, 2008. pp. 155-170
  • Beer, M.; Liebscher, M.: Designing robust structures a nonlinear simulation based approach. Computers & Structures 86 (2008) 10, pp. 1102-1122 – doi:10.1016/j.compstruc.2007.05.037
  • Freitag, S.; Graf, W.; Pannier, S.; Sickert, J.-U.: Reliability of structures under consideration of uncertain time-dependent material behaviour. In: Dubois, D. et al. (eds.): Adcances in Soft Computing 48. Soft Methods for Handling Variability and Imprecision. Berlin : Springer, 2008, pp. 383-390 4th Internat. Conference on Soft Methods in Probability and Statistics, Toulouse, 2008
  • Pannier, S.; Sickert, J.-U.; Graf, W.: Optimization under consideration of uncertain input quantities. In: GAMM-Tagung, Bremen, 2008. – CD-ROM
  • Sickert, J.-U.; Graf, W.; Pannier, S.: Strengthening with textile reinforced concrete reliability based design with imprecise probability. In: Bondindi, F.; Fangopol, D. (eds.), 1st International Symposium on Life-Cycle Civil Engineering, Varenna. CRC Press, Boca Raton, Taylor & Francis Group : London, 2008, pp. 463-468
  • Graf, W.; Pannier, S.; Sickert, J.-U.: Response surfaces models for uncertain structural analysis. In: Schreffler, B.; Perego, U. (eds.): 8th World Congress Computational Mechanics, Venedig, 2008. Abstract, CD-ROM
  • Jenkel, C.; Graf, W.; Pannier, S.; Sickert, J.-U.: Structural health monitoring under consideration of uncertain data. In: 7. LS-DYNA Forum 2008, Bamberg. Kap. F-I, pp. 1-10
  • Pannier, S.; Sickert, J.-U.; Graf W.: Optimization under consideration of uncertain input quantities. PAMM 8 (2008) pp. 10781-10782 – doi:10.1002/pamm.200810781

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
  • Möller, B.; Graf, W.; Sickert, J.-U.; Reuter, U.: Numerical simulation based on fuzzy stochastic analysis. Mathematical and Computer Modelling of Dynamical Systems 13 (2007) 4, pp. 349-364
  • Möller, B.; Graf, W.; Liebscher, M.; Sickert, J.-U.; Pannier, S.: An inverse solution of the lifetime oriented design problem. In: 3rd Int. Conference Lifetime Oriented Design Concepts ICLODC 2007, Bochum, 2007. pp. 21-40
  • Sickert, J.-U.; Möller, B.; Graf, W.: Fuzzy Stochastic Finite Element Analysis. In: Kanda, J.; Takada, T.; Furuta, H. (eds.): Application of Statistics and Probability in Civil Engineering - Proceedings of the ICASP 10, Tokyo. Balkema, Leiden : Taylor & Francis, 2007, pp. 253-254, CD-ROM, pp. 1-9
  • Möller, B.; Graf, W.; Hoffmann, A.; Sickert, J.-U.: Uncertainty models for safety assessment of textile reinforced concerte structures In: Grosse, C. U. (ed.): Advances in Construction Materials 2007. Berlin : Springer, 2007, pp. 67-74
  • Möller, B.; Reuter, U.: Uncertainty Forecasting in Engineering. Berlin : Springer, 2007

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
  • Möller, B.; Graf, W.; Sickert, J.-U.; Beer, M.: Time-dependent reliability of textile strengthened RC structures under consideration of fuzzy randomness. Computers and Structures 84 (2006) 8-9, pp. 585-603
  • Möller, B.; Reuter, U.: Prediction of structural responses with fuzzy time series. In: Muhanna. R. (ed.): 2nd Workshop on Reliable Engineering Computing, Savannah, GA. 2006, Kluver Academic Publ., 2006, 21 pp.
  • Möller, B.; Reuter, U.: Random processes with uncertain data. In: Spanos, P.D. (ed.): Workshop Computational Stochastic Mechanics 2006, Rhodes. 9 pp.
  • 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.; Reuter, U.: Forcasting of structural responses using fuzzy time series. In: Liu, W. K.; Chen, J. S. (eds.): Seventh World Congress on Computational Mechanics, Los Angeles, 2006. keynote lecture, paper 674
  • Graf, W.; Möller, B.; Bartzsch, M.: Modification of structures as an uncertain process. In: Liu, W. K.; Chen, J. S. (eds.): Seventh World Congress on Computational Mechanics, Los Angeles, 2006. paper 673
  • Sickert, J.-U.; Möller, B.; Graf, W.; Freitag, S.: Time-dependent reliability of strengthened RC structures. In: Hegger, J.; Brameshuber, W.; Will, N. (eds.): 1st Intern. RILEM Symposium Textile Reinforced Structures, RWTH Aachen, 2006. pp. 265-274
  • Liebscher, M.; Pannier, S.; Sickert, J.-U.; Graf, W.: Efficiency Improvement of Stochastic Simulation by Means of Subset Sampling. In: 5th LS-DYNA Forum 2006. Ulm, 2006, p. K-I-41–K-I-56
  • Graf, W.; Möller, B.; Beer, M.: Zum Einfluß der Datenbasis auf Tragwerkssicherheit und Versagensrisiko. Wissenschaftliche Zeitschrift der Technischen Universität Dresden 55 (2006) Heft 3–4, S. 49–53
  • Reuter, U.:Analyse und Prognose von Zeitreihen mit Fuzzy-Daten zur Prädiktion von Strukturantworten. Dissertation, Dresden: Fakultät Bauingenieurwesen, Technische Universität Dresden, 2006.

2005

  • 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
  • Sickert, J.-U.; Graf, W.; Reuter, U.: Application of fuzzy randomness to time-dependent reliability. In: Augusti, G. (ed.); Schueller, G. I. (ed.); Ciampoli, M. (ed.): Safety and Reliability of Engineering Systems and Structures Proceedings of the 9th Int. Conference on Structural Safety and Reliability, ICOSSAR'05, Rome, 2005. Millpress, Rotterdam, 2005, CD-ROM, Doc. MS0702, pp. 1709-1716
  • Graf, W.; Möller, B.; Bartzsch, M.: Modification of bar structures described by fuzzy processes. In: Computational Methods and Experimental Measurements XII, Malta 2005. WIT Press, Southampton, Boston, pp. 3-14
  • Möller, B.; Graf, W.: Tragwerksprozesse in der Baustatik. In: Baustatik-Baupraxis 9. TU Dresden, 2005, Bericht, S. 381-393
  • Sickert, J.-U.; Graf, W.; Möller, B.: Entwicklung und Anwendung der Fuzzy-stochastischen Finite-Elemente-Methode. In: Hülsemann, F.; Kowarschik, M.; Rüde, U. (eds.): 18th Symposium Simulationstechnique. Friedrich-Alexander Universität Erlangen, 2005, SCS Publ., Erlangen, pp. 199-204
  • Sickert, Jan-Uwe: Fuzzy-Zufallsfunktionen und ihre Anwendung bei der Tragwerksanalyse und Sicherheitsbeurteilung. Dissertation, Veröffentlichungen Institut für Statik und Dynamik der Tragwerke, Heft 9, TU Dresden, 2005

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
  • 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
  • Möller, B.; Beer, M.: Fuzzy Randomness - Uncertainty in Civil Engineering and Computational Mechanics. Berlin : Springer Verlag, 2004
  • Möller, B.; Graf, W.; Beer, M.: Discussion on "Structural reliability analysis through fuzzy number approach, with application to stability". In: Computers & Structures 82(2004) pp. 325-327
  • Möller, B.; Graf, W.; Bartzsch, M.: Modification of systems - an uncertain discontinuous process. In: 2nd Int. Conference Lifetime-Oriented Design Concepts (ICLODC 04), Proceedings, Ruhr-Uni Bochum, 2004, pp. 61-68
  • Möller, B.; Graf, W.; Ha, N. S.: Modeling the life-cycle of a structure using fuzzy processes. In: Intern. Journal of Computer-Aided Civil and Infrastructure Engineering 19(2004), pp. 157-169, Blackwell Publ., Malden, Cambridge, Oxford
  • Möller, B.; Graf, W.; Beer, M.; Sickert, J.-U.: Das Datenmodell Fuzzy-Zufälligkeit und seine Anwendungsmöglichkeiten im Ingenieurbau. In: Festschrift Prof. D. Hartmann 60. Geburtstag, Ruhr-Uni Bochum. Aachen : Shaker-Verlag, 2004, S. 97-106
  • Möller, B.: Fuzzy-Randomness – a Contribution to Imprecise Probability. In: Fuzzy Sets, Imprecise Probability and Stochastics in Engineering. Special Issue of ZAMM, 84(2004), pp. 754-764
  • Graf, W.; Möller, B.; Ruge, P.: Unscharfe Tragstrukturen in Raum und Zeit. In: Wiss. Zeitschrift der TU Dresden, 2004, H. 3-4, S. 121-126
  • Möller, B.; Graf, W.; Stransky, W.: Fuzzy-Optimization of Structures. In: ICCES´04, Madeira, 2004, Proceedings, Tech Science Press, pp. 1765-1770
  • 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, 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
  • Beer, M.: Sample-Induced Simulation of Fuzzy Randomness. In: Wojtkiewicz, S.; Red-Horse, J.; Ghanem, R. (eds.): 9th ASCE EMD/SEI/GI/AD Joint Specialty Conference on Probabilistic Mechanics and Structural Reliability, Albuquerque, NM, 2004. CD-ROM, Doc. 08_103, 6 pp.
  • Beer, M.; Spanos, P. D.: A Neural Network Approach for Representing Realizations of Random Processes. In: Wojtkiewicz, S.; Red-Horse, J.; Ghanem, R. (eds.): 9th ASCE EMD/SEI/GI/AD Joint Specialty Conference on Probabilistic Mechanics and Structural Reliability Albuquerque, NM, 2004. CD-ROM, Doc. 04_104, 6 pp.

2003

  • 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
  • Beer, M.: Ein fuzzy-probabilistisches Konzept zur Sicherheitsbeurteilung bei Unschärfe. In: Berichtskolloquium, DFG-Sonderforschungsbereich 477. TU Braunschweig, 2003, S. 99-108
  • Möller, B.; Beer, M.; Liebscher, M.: Fuzzy Cluster Design: A new way for structural design. In: Topping, B.H.V (Ed.) 9th International Conference on Civil and Structural Engineering mputing, Egmond-aan-Zee 2003, Civil-Comp Press, Stirling, pp. 285-286, CD-ROM
  • Möller, B.; Graf, W.; Beer, M.: Safety assessment of structures in view of fuzzy randomness. In: Computers & Structures 81(2003)1567-1582
  • Möller, B.; Graf, W.; Beer, M.; Sickert, J.-U.: Fuzzy Stochastic Finite Element Method. In: Bathe, K.J. (Ed.): 2nd MIT Conference, Boston, 2003, pp. 2074-2077
  • Möller, B.; Sickert, J.-U.; Graf, W.; Beer, M.: Berücksichtigung räumlich verteilter Unschärfe 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. 435–446
  • Sickert, J.-U.; Beer, M.; Graf, W.; Möller, B.: Fuzzy probabilistic structural analysis considering fuzzy random functions. In: Der Kiureghian, A.; Madanat, S.; Pestana, J.M. (Eds.): 9th Int. Conference on Applications of Statistics and Probability in Civil Engineering, San Francisco, 2003, pp. 379-386
  • Nguyen, S.H.: Modellierung unscharfer zeitabhängiger Einflüsse als Fuzzy-Prozess - Anwendung auf die Schädigung von Tragwerken und auf die Simulation von Erdbeben. Veröffentlichungen des Lehrstuhls für Statik, H. 6 (2003), TU Dresden

2002

  • Abdkader, A.; Graf, W.; Möller, B.; Offermann, P.; Sickert, J.-U.: Fuzzy-Stochastic Evaluation of Uncertainties in Material Parameters of textiles. In: AUTEX Research Journal 2 (2002), No 3, pp. 115–125, (www.autexrj.org/No5/0027.pdf)
  • Möller, B; Graf, W.; Nguyen S.H.: Modeling the life-cycle of a structure using fuzzy processes. In: Ninth Intern. Conf. on Computing in Civil and Building Engineering. Taipei, 2002, pp. 97-102
  • Möller, B.; Graf, W.; Beer, M.; Sickert, J.-U.: Fuzzy Randomness – Towards a new Modeling of Uncertainty. In: Mang, A. H.; Rammerstorfer, F. G.; Eberhardsteiner, J. (eds.): Fifth World Congress on Computational Mechanics. Vienna, 2002, 10 pp., PDF-Datei
  • Nguyen, S. H.; Möller, B.; Graf, W.: Modeling of Time-dependent Loading as a Fuzzy Process. In: Grundmann, H.; Schuëller, G.I. (eds.): Fifth European Conference on Structural Dynamics, Munich, 2002. A.A. Balkema, EURODYN 2002, Vol. 1, pp. 679-684
  • Beer, M.: Fuzziness und Fuzzy-Zufälligkeit bei der Sicherheitsbeurteilung von Tragwerken. Dissertation., Dresden: Fakultät Bauingenieurwesen, Technische Universität Dresden, 2002

2001

  • 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
  • Bartzsch, M.; Bothe, E.; Graf, W.; Möller, B.; Schneider, R.: Systemmodifikation und ihre Auswirkung auf den Schnittkraft- und Deformationszustand von Tragwerken. In: Bautechnik 78 (2001), 4, S. 263-271
  • Graf, W.; Hoffmann, A.; Möller, B.; Steinigen, F.: Numerical simulation and experimental measurements of RC-structures with textile  reinforcements. In: Brebbia, C. A. (Hrsg.); Carlomagno, G. M. (Hrsg.); Villacampa, Y. (Hrsg.): Computational Methods and Experimental Measurements X. Alicante 2001, WIT Press, Southampton, Boston, S. 387–396
  • Möller, B.; Graf, W.; Beer, M.; Sickert, J.-U.: Fuzzy probabilistic methods and its application for the safety assessment of structures. In: European Conference on Computational Mechanics (ECCM2). Krakow, 2001, CD-Rom
  • Möller, B.; Graf, W.; Ha Nguyen, S.: Uncertainty in damage assessment of structures and its numerical simulation. In: Intern. Journal of Computer-Aided Civil and Infrastructure Engineering 16 (2001), 6, S. 375–383
  • Möller, B.; Graf, W.; Sickert, J.-U.: Beurteilung des Sicherheitsniveaus textilverstärkter Bauwerke. In: 1. Fachkolloquium Textilbeton. RWTH Aachen, 2001, S. 275-286 (PDF-Datei, 248 kB)
  • Möller, B.; Graf, W.; Sickert, J.-U.: Fuzzy Finite Element Method and its Application. In: Wall, W. (Hrsg.); Bletzinger, K.-U. (Hrsg.); Schweizerhof, K. (Hrsg.): Trends in Computational Structural Mechanics, Colloquium 2001, CIMNE. Barcelona. 2001, S. 529–538

2000

  • 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.; Beer, M.; Graf, W.; Hoffmann, A.; Sickert, J.-U.: Fuzzy based reliability assessment of structures. In: IASS-IACM 2000, 4. Intern. Colloquium on Computation of Shell and Spatial Structures. Chania-Crete, 2000, CD-Rom
  • Möller, B.; Beer, M.; Graf, W.; Hoffmann, A.; Sickert, J.-U.: Modellierung von Unschärfe im Ingenieurbau. In: Bauinformatik Journal 3 (2000), 3, S. 21–25
  • Möller, B.; Graf, W.; Beer, M.: Fuzzy structural analysis using alpha-level optimization. In: Computational Mechanics 26 (2000), 6, pp. 547–565
  • Möller, B.; Graf, W.; Beer, M.: Fuzzy-Tragwerksanalyse – Tragwerksanalyse mit unscharfen Parametern. In: Bauingenieur 75 (2000), 11, S. 697–708

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
  • Möller, B.; Beer, M.; Graf, W.; Schneider, R.: Fuzzy-Methoden zur Beurteilung der Sicherheit von Stahlbeton-Tragwerken. In: Meskouris, K. (Hrsg.): 7. Fachtagung Baustatik-Baupraxis. RWTH Aachen 1999, A. A. Balkema Publ., Rotterdam, 1999, S. 229-236
  • Möller, B.; Graf, W.; Hoffmann, A.; Beer, M.: Ultimate limit loads of RC-folded plate structures with textile reinforcement. In: Computational Methods and Experimental Measurements 1999. Sorrento WIT Press, Southampton, Boston, S. 453-462

1998

  • Möller, B.; Beer, M.: Safety Assessment using Fuzzy Theory. In: Proceedings of the Fifth Congress on Computing on Civil Engineering Information Technologies in Civil Engineering. Boston, 1998, S. 756–759
  • Möller, B.; Beer, M.; Graf, W.; Hoffmann, A.: Possibility Theory Based Safety Assessment. In: Microcomputers in Civil Engineering. Blackwell Publ., Cambridge, Oxford, Special Issue: Fuzzy Logic, 1998, S. 81–91

Seitenanfang

Diplomarbeiten

  • Sieberer, Johann: Effizienzsteigerung der unscharfen Analyse durch den Einsatz neuer Simulationsmethoden
  • Menge, Robert: Fuzzy-stochastische Tragwerksanalyse unter Berücksichtigung von Stichproben mit Fuzzy-Elementen
  • Thomas Reichl: Sicherheitsbeurteilung textilverstärkter Stahlbeton-Faltwerke mit Hilfe der Possibility-Theorie
  • Matthias Stein: Entwicklung von fuzzy-probabilistischen Simulationstechniken zur Beurteilung textilverstärkter Tragwerke
  • Andreas Wester: Fuzzy-probabilistische Datenanalyse und Sicherheitsbeurteilung von eben wirkenden Stahlbeton-Stabtragwerken
  • Uwe Reuter: Ermittlung des zeitabhängigen Sicherheitsniveaus nachträglich verstärkter Stahlbeton-Tragwerke unter Berücksichtigung von Fuzzy-Zufallsfunktionen

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