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Keywords: smeared crack model, concrete, arc-length method, finite element modelling.

Summary

Concrete remains one of the most used building materials around the world due to the excellent material and technological properties of concrete. It is easy and relatively inexpensive to create and use. Concrete offers relatively good mechanical properties (namely the compression strenth). But the use of concrete also implies several technological and design problems. In this paper we will deal only with the problems which are induced by the limited strength in tension of this material and with selected aspects of numerical modelling of concrete in tension.

The work presented is a very small part of a research project that is aimed at preparing a feasible procedure for obtaining input data for the non-linear modelling of concrete.

The paper overviews several aspect of numerical modelling. It includes some notes about the creation of finite element models, concerning possible computational procedures and it also discusses some aspects of constitutive modelling (the range of possible constitutive models for concrete is very wide so only one approach [1] is discussed here).

The application of two-dimensional finite elements for plane stress problems is mentioned here. There are several common possibilities in the field of finite element modelling. The simplest finite element which can be used here is a three-node triangle [2]. This type of element is sometimes used for similar problems and it has several advantages (for example, the possibility of creating good inregular meshes). Its disadvantage is the fact that a linear approximation of unknowns must be used here. This implies that stresses and strains are constant on whole area of such element.

References

1: Z.P. Bazant, J. Planas "Fracture and Size Effect in Concrete and Other Quasibrittle Materials", CRC Press, Boca Raton, USA, 1998.
2: O.C. Zienkiewicz "The Finite Element Method in Engineering Science", London, McGraw-Hill, 1971.

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Front Page Browse CCP CSETS CTR IJRT Other Authors Search Purchase Guide FAQ Contact us	Civil-Comp Proceedings ISSN 1759-3433 CCP: 91 PROCEEDINGS OF THE TWELFTH INTERNATIONAL CONFERENCE ON CIVIL, STRUCTURAL AND ENVIRONMENTAL ENGINEERING COMPUTING Edited by: B.H.V. Topping, L.F. Costa Neves and R.C. Barros Paper 119 Comparison of Alternatives for Remodelling of Laboratory Tests of Concrete J. Brozovsky, P. Konecny, M. Mynarz and O. Sucharda Faculty of Civil Engineering, VSB-TU of Ostrava, Czech Republic doi:10.4203/ccp.91.119 purchase the full-text of this paper Full Bibliographic Reference for this paper J. Brozovsky, P. Konecny, M. Mynarz, O. Sucharda, "Comparison of Alternatives for Remodelling of Laboratory Tests of Concrete", in B.H.V. Topping, L.F. Costa Neves, R.C. Barros, (Editors), "Proceedings of the Twelfth International Conference on Civil, Structural and Environmental Engineering Computing", Civil-Comp Press, Stirlingshire, UK, Paper 119, 2009. doi:10.4203/ccp.91.119 Keywords: smeared crack model, concrete, arc-length method, finite element modelling. Summary Concrete remains one of the most used building materials around the world due to the excellent material and technological properties of concrete. It is easy and relatively inexpensive to create and use. Concrete offers relatively good mechanical properties (namely the compression strenth). But the use of concrete also implies several technological and design problems. In this paper we will deal only with the problems which are induced by the limited strength in tension of this material and with selected aspects of numerical modelling of concrete in tension. The work presented is a very small part of a research project that is aimed at preparing a feasible procedure for obtaining input data for the non-linear modelling of concrete. The paper overviews several aspect of numerical modelling. It includes some notes about the creation of finite element models, concerning possible computational procedures and it also discusses some aspects of constitutive modelling (the range of possible constitutive models for concrete is very wide so only one approach [1] is discussed here). The application of two-dimensional finite elements for plane stress problems is mentioned here. There are several common possibilities in the field of finite element modelling. The simplest finite element which can be used here is a three-node triangle [2]. This type of element is sometimes used for similar problems and it has several advantages (for example, the possibility of creating good inregular meshes). Its disadvantage is the fact that a linear approximation of unknowns must be used here. This implies that stresses and strains are constant on whole area of such element. References 1 Z.P. Bazant, J. Planas "Fracture and Size Effect in Concrete and Other Quasibrittle Materials", CRC Press, Boca Raton, USA, 1998. 2 O.C. Zienkiewicz "The Finite Element Method in Engineering Science", London, McGraw-Hill, 1971. purchase the full-text of this paper (price £20) go to the previous paper go to the next paper return to the table of contents return to the book description purchase this book (price £140 +P&P)
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