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Modelling concrete strains caused by shrinkage and creep by means of effective stresses
Języki publikacji
Abstrakty
Przedstawiono nowy model odkształceń betonu, oparty na koncepcji naprężeń efektywnych. Zastosowano nową definicję naprężeń efektywnych w odniesieniu do ośrodków z dobrze rozwiniętą strukturą wewnętrzną porowatości. Wykazano, że prezentowany model może być stosowany w praktyce do analizy konstrukcji betonowych.
A new mathematical model of concrete strains, based on the concept of effective stresses, has been presented in this paper. A new definition of the effective stresses for media with a well developed inner structure of porosity, has been used. Comparison of the simulation results with the experimental data concerning autogenous strains of maturing cement paste, as well as creep and shrinkage strains of an ordinary concrete, showed that the model can be practically used for analysis of concrete structures with a sufficient accuracy.
Słowa kluczowe
Czasopismo
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Tom
Strony
209--212
Opis fizyczny
Bibliogr. 13 poz., il.
Twórcy
Bibliografia
- [1] Bazant Z. P. (red.): Mathematical Modeling of Creep and Shrinkage of Concrete. John Wiley & Sons, Chichester 1988.
- [2] Bazant Z. P., Hauggaard A. B., Baweja S.: Microprestress-solidification theory for concrete creep. I: Algorithm and verification. „Journal of Engineering Mechanics ASCE", Vol. 123 (11), 1997.
- [3] Gawin D.: Modelowanie sprzężonych zjawisk cieplno-wilgotnościowych w materiałach i elementach budowlanych. Zeszyty Naukowe PŁ, nr 853, Łódź 2000.
- [4] Lewis R. W., Schrefler B. A.: The Finite Element Method in the Static and Dynamic Deformation and Consolidation of Porous Media. 2nd edition. John Wiley & Sons, Chichester 1998.
- [5] Schrefler B. A., Gawin D.: The effective stress principle: incremental or finite form? „Int. J. Numer. Anal. Meth. Geomech.", Vol. 20, Nr. 11, 1996.
- [6] Gray W. G., Schrefler B. A.,: Thermodynamic Approach to Effective Stress in Partially Saturated Porous Media. „European Journal of Mechanics A/Solids", Vol. 20, 2001.
- [7] Gawin D., Pesavento F., Schrefler BA.: Hygro-thermo-chemo-mechanical modeling of concrete at early ages and beyond. Part II: Shrinkage and creep of concrete. „Int. J. Num. Meth. Engng." Vol. 67, No. 3, 2006.
- [8] Gawin D., Pesavento F., Schrefler BA.: Modelling creep and Shrinkage of concrete by means of effective stresses, Materials and Structures, 2006 (opublikowany on-line: doi: 10.1617/s11527-006-9165-1).
- [9] Lura P., Jensen O. M., van Breugel K.: Autogenous Shrinkage in high-performance cement paste: an evaluation of basic mechanisms. Modelling of autogenous relative humidity change and autogenous deformation. „Cement and Concrete Research", Vol. 33, 2003.
- [10] Bryant A. H., Vadhanavikkit C.: Creep, shrinkage-size, and age at loading effects. „ACI Materials Journal", March-April 1987.
- [11] Russel H. G., Corley W. G.: Time-dependent behaviour of columns in 'Water Tower Place. Research and Development Bulletin RD052.01 B. Portland Cement Association, 1977.
- [12] Baroghel-Bouny V., Mainguy M., Lassabatere T., Coussy O.: Characterization and identification of equilibrium and transfer moisture properties for ordinary and high-performance cementitious materials. „Cement and Concrete Research", Vol. 29,1999.
- [13] Bazant Z.P., Xi Y.: Continuous retardation spectrum for solidification theory of concrete creep „Journal of Engineering Mechanics ASCE", Vol. 121, 1995.
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-article-BTB2-0035-0060