Tehnički vjesnik, Vol. 24 No. 3, 2017.
Izvorni znanstveni članak
https://doi.org/10.17559/TV-20151027225413
New stress-strain model for concrete at high temperatures
Nenad Stojković
; College of Applied Technical Sciences in Niš, Aleksandra Medvedeva 20, 18000 Niš, Serbia
Dragan Perić
; College of Applied Technical Sciences in Niš, Aleksandra Medvedeva 20, 18000 Niš, Serbia
Dragoslav Stojić
; University of Niš, Faculty for Civil Engineering and Architecture, Aleksandra Medvedeva 14, 18000 Niš, Serbia
Nemanja Marković
; University of Niš, Faculty for Civil Engineering and Architecture, Aleksandra Medvedeva 14, 18000 Niš, Serbia
Sažetak
Concrete is one of the most widely used materials in civil engineering structures. Extremely high temperatures can seriously damage the concrete structure, leading to degradation of its mechanical properties. Considering high temperatures in civil engineering applications is strongly connected with the fire scenarios in which temperatures in concrete can reach 1000 °C. For using computer software for analysis of the reinforced concrete structures, it is essential to formulate constitutive stress-strain models of steel and concrete, which can be done using fundamental approach or by fitting curves to experimental data. In this paper, new stress-strain model was proposed using the two-parameter equation for fitting curves to experimental data. Verification of the model is done using experimental results available in the literature for temperatures up to 800 °C. Comparison with the models available in the literature was provided. The new model showed better agreement with experimental results, especially for the temperatures higher than 500 °C.
Ključne riječi
concrete; high temperature; stress-strain curve
Hrčak ID:
183048
URI
Datum izdavanja:
15.6.2017.
Posjeta: 2.345 *