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Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Analytical model for prediction of size-dependent stress-strain curves of high-strength concrete in uniaxial compression
Accounting for post-peak ductility in the design of reinforced concrete elements is important in many respects, especially for preventing brittle structural failures, accounting for moment redistribution in statically indeterminate structures, and providing sufficient energy absorption in structures subjected to seismic-type loading. The uniaxial compressive response of concrete prisms or cylinders is generally accepted to represent sufficiently well the compression zone of flexural reinforced concrete members. This paper presents an analytical approach for considering the influence of specimen size (slenderness) on the complete stress-strain curves for normal- and highstrength concrete cylinders in compression, which may be necessary for the accurate design of a reinforced flexural member or in nonlinear analyses of concrete structures. The uniaxial compressive response of concrete is considered using a strain localization-based model that accounts for the size-dependent stress-strain response. This model is formulated based on experimental data from uniaxial cylinder tests in which specimens of different slenderness ratios were investigated. The compressive response of the concrete is modeled by dividing the concrete into a bulk and a damaged section response, and an expression is proposed for the critical damage strain in terms of the concrete compressive strength. The predicted response of the specimens investigated was found to correlate quite well with the experimental observations.
Analytical model for prediction of size-dependent stress-strain curves of high-strength concrete in uniaxial compression
Accounting for post-peak ductility in the design of reinforced concrete elements is important in many respects, especially for preventing brittle structural failures, accounting for moment redistribution in statically indeterminate structures, and providing sufficient energy absorption in structures subjected to seismic-type loading. The uniaxial compressive response of concrete prisms or cylinders is generally accepted to represent sufficiently well the compression zone of flexural reinforced concrete members. This paper presents an analytical approach for considering the influence of specimen size (slenderness) on the complete stress-strain curves for normal- and highstrength concrete cylinders in compression, which may be necessary for the accurate design of a reinforced flexural member or in nonlinear analyses of concrete structures. The uniaxial compressive response of concrete is considered using a strain localization-based model that accounts for the size-dependent stress-strain response. This model is formulated based on experimental data from uniaxial cylinder tests in which specimens of different slenderness ratios were investigated. The compressive response of the concrete is modeled by dividing the concrete into a bulk and a damaged section response, and an expression is proposed for the critical damage strain in terms of the concrete compressive strength. The predicted response of the specimens investigated was found to correlate quite well with the experimental observations.
Analytical model for prediction of size-dependent stress-strain curves of high-strength concrete in uniaxial compression
Analytisches Modell zur Vorhersage der größenabhängigen Spannungs-Dehnungskurve von hochfestem Beton bei uniaxialem Druck
Umberto, J. (Autor:in) / Borges, A. (Autor:in) / Bittencourt, T.N. (Autor:in)
2002
12 Seiten, 10 Bilder, 1 Tabelle, 14 Quellen
Aufsatz (Konferenz)
Englisch
| British Library Conference Proceedings | 2002
Uniaxial Stress-Strain Curves of High Strength Concrete
| NTIS | 1990
Uniaxial stress-strain curves of high strength concrete
| TIBKAT | 1990
Empirical Stress-Strain Model for Unconfined High-Strength Concrete under Uniaxial Compression
| British Library Online Contents | 2010